GMC Vehicle Models Jimmy 1970-1991
GMC Vehicle Models Jimmy 1970-1991 Torque Specifications
Complete GMC Vehicle Models Jimmy 1970-1991 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.
Updated
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
Prevention:
Always use a calibrated torque wrench and follow specifications exactly.
Incorrect Torque Sequence
Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.
Prevention:
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
Prevention:
Clean and inspect all threads before assembly. Use new thread locker if specified.
Reusing TTY Bolts
Torque-to-yield bolts are designed to stretch and must not be reused.
Prevention:
Always replace TTY bolts with new ones. They are single-use only.
Dry vs. Lubricated
Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.
Prevention:
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Range: 2-25 ft-lbs
Small fasteners, delicate components
Torque Wrench (3/8" Drive)
Range: 10-100 ft-lbs
Most common automotive fasteners
Torque Wrench (1/2" Drive)
Range: 30-250 ft-lbs
Large fasteners, wheels
Angle Gauge
Torque-to-yield (TTY) bolts
Torque Wrench Care
- Calibrate annually or after 5,000 clicks
- Store at lowest setting
- Keep clean and lubricated
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5.0l Engine
Torque specifications for 5.0L Engine
5.0l Engine
Torque specifications for 5.0L Engine
Cylinder Head
1 Cylinder Head Bolts
M10 x 1.5
1
Cylinder Head Bolts
M10 x 1.5
Torque Specification
1. 20 ft-lbs (27 N·m)
2. 25 ft-lbs (34 N·m)
Important Notes
Follow the manufacturer's torque sequence for proper sealing. Values are based on typical M10 x 1.5 bolts.
2 Valve Cover Bolts
M6 x 1.0
2
Valve Cover Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Avoid over-tightening to prevent gasket damage. Estimated value for M6 x 1.0 bolts.
3 Rocker Arms/Shafts Bolts
M8 x 1.25
3
Rocker Arms/Shafts Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper valve train alignment. Estimated value for M8 x 1.25 bolts.
Crankshaft And Bearings
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
100 ft-lbs (136 N·m)
Important Notes
Follow the manufacturer's torque sequence for proper crankshaft alignment.
2 Connecting Rod Nuts
M10 x 1.25
2
Connecting Rod Nuts
M10 x 1.25
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Ensure proper rod cap alignment. Estimated value for M10 x 1.25 nuts.
3 Flywheel Bolts
M12 x 1.75
3
Flywheel Bolts
M12 x 1.75
Torque Specification
62 ft-lbs (84 N·m)
Important Notes
Ensure proper torque transfer to the transmission. Estimated value for M12 x 1.75 bolts.
Intake And Exhaust
1 Intake Manifold Bolts
M8 x 1.25
1
Intake Manifold Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Follow the manufacturer's torque sequence to prevent vacuum leaks.
2 Exhaust Manifold Bolts
M8 x 1.25
2
Exhaust Manifold Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure proper sealing to prevent exhaust leaks. Estimated value for M8 x 1.25 bolts.
Oil System
1 Oil Pan Bolts
M6 x 1.0
1
Oil Pan Bolts
M6 x 1.0
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Ensure proper sealing to prevent oil leaks. Estimated value for M6 x 1.0 bolts.
2 Oil Drain Plug Bolt
M14 x 1.5
2
Oil Drain Plug Bolt
M14 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure proper sealing to prevent oil leaks. Estimated value for M14 x 1.5 bolt.
5.7l Engine
Torque specifications for 5.7L Engine
5.7l Engine
Torque specifications for 5.7L Engine
Cylinder Head
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
1. 20 ft-lbs (27 N·m)
2. 25 ft-lbs (34 N·m)
Important Notes
Follow the manufacturer's torque sequence to avoid warping the cylinder head.
2 Rocker Arms/Shafts Bolts
M8 x 1.25
2
Rocker Arms/Shafts Bolts
M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure rocker arms are properly aligned before tightening.
Crankshaft And Bearings
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
100 ft-lbs (136 N·m)
Important Notes
Follow the manufacturer's torque sequence to ensure proper crankshaft alignment.
2 Connecting Rod Nuts
M10 x 1.25
2
Connecting Rod Nuts
M10 x 1.25
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Ensure connecting rods are properly aligned before tightening.
Flywheel And Harmonic Balancer
1 Flywheel Bolts
M10 x 1.5
1
Flywheel Bolts
M10 x 1.5
Torque Specification
62 ft-lbs (84 N·m)
Important Notes
Ensure the flywheel is properly aligned before tightening.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M12 x 1.75
2
Crankshaft Pulley/Harmonic Balancer Bolt
M12 x 1.75
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Use a holding tool to prevent crankshaft rotation during tightening.
Intake And Exhaust
1 Intake Manifold Bolts
M8 x 1.25
1
Intake Manifold Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Follow the manufacturer's torque sequence to ensure proper sealing.
2 Exhaust Manifold/Headers Bolts
M8 x 1.25
2
Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure exhaust gaskets are properly aligned before tightening.
Oil System
1 Oil Pan Bolts
M6 x 1.0
1
Oil Pan Bolts
M6 x 1.0
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Ensure the oil pan gasket is properly aligned before tightening.
2 Oil Drain Plug Bolt
M14 x 1.5
2
Oil Drain Plug Bolt
M14 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Replace the crush washer to prevent leaks.
6.2l Engine
Torque specifications for 6.2L Engine
6.2l Engine
Torque specifications for 6.2L Engine
Cylinder Head
1 Cylinder Head Bolts (Initial)
M12 x 1.5
1
Cylinder Head Bolts (Initial)
M12 x 1.5
Torque Specification
1. 20 ft-lbs (27 N·m)
2. 25 ft-lbs (34 N·m)
Important Notes
Initial torque for seating the cylinder head. Follow the manufacturer's torque sequence.
2 Cylinder Head Bolts (Final)
M12 x 1.5
2
Cylinder Head Bolts (Final)
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Final torque to ensure proper clamping force and head gasket sealing. Estimated value based on similar engines.
3 Valve Cover Bolts
M6 x 1.0
3
Valve Cover Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensures a proper seal for the valve cover. Estimated value based on similar engines.
4 Rocker Arm Bolts
M8 x 1.25
4
Rocker Arm Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the rocker arms to the cylinder head. Estimated value based on similar engines.
Crankshaft And Bearings
1 Main Bearing Bolts
M12 x 1.5
1
Main Bearing Bolts
M12 x 1.5
Torque Specification
100 ft-lbs (136 N·m)
Important Notes
Secures the main bearing caps to the engine block. Follow the manufacturer's torque sequence.
2 Connecting Rod Nuts
M10 x 1.25
2
Connecting Rod Nuts
M10 x 1.25
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Secures the connecting rod to the crankshaft. Estimated value based on similar engines.
3 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
3
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Secures the harmonic balancer to the crankshaft. Estimated value based on similar engines.
Intake And Exhaust
1 Intake Manifold Bolts
M8 x 1.25
1
Intake Manifold Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensures a proper seal between the intake manifold and cylinder head. Follow the manufacturer's torque sequence.
2 Exhaust Manifold Bolts
M8 x 1.25
2
Exhaust Manifold Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Secures the exhaust manifold to the cylinder head. Follow the manufacturer's torque sequence.
Oil System
1 Oil Pan Bolts
M6 x 1.0
1
Oil Pan Bolts
M6 x 1.0
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Ensures a proper seal between the oil pan and engine block. Follow the manufacturer's torque sequence.
2 Oil Drain Plug
M14 x 1.5
2
Oil Drain Plug
M14 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Secures the oil drain plug to the oil pan. Estimated value based on similar engines.
Body
Torque specifications for Body
Body
Torque specifications for Body
Body Panels
1 Body Panel Bolts (e.g., fenders, hood, doors)
M6 x 1.0
1
Body Panel Bolts (e.g., fenders, hood, doors)
M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value. Prevents over-tightening (warping) or under-tightening (rattling).
Bumpers
1 Bumper Mounting Bolts
M8 x 1.25
1
Bumper Mounting Bolts
M8 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated value. Ensures bumper remains securely fastened during impacts.
Seats
1 Seat Mounting Bolts
M10 x 1.5
1
Seat Mounting Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value. Critical for passenger safety and preventing seat movement.
Doors
1 Door Hinge Bolts
M8 x 1.25
1
Door Hinge Bolts
M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Prevents door misalignment or sagging.
Radiator Support
1 Radiator Support Bolts
M6 x 1.0
1
Radiator Support Bolts
M6 x 1.0
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated value. Ensures proper alignment of the radiator and front-end components.
Tailgate Hatch
1 Tailgate/Hatch Bolts
M8 x 1.25
1
Tailgate/Hatch Bolts
M8 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated value. Prevents rattling or looseness.
Roof Rack
1 Roof Rack Mounting Bolts
M6 x 1.0
1
Roof Rack Mounting Bolts
M6 x 1.0
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated value. Prevents movement or detachment during use.
Mirrors
1 Mirror Mounting Bolts
M6 x 1.0
1
Mirror Mounting Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (13.5 N·m)
Important Notes
Estimated value. Ensures proper alignment and prevents vibration.
Wiper Arms
1 Windshield Wiper Arm Bolts
M6 x 1.0
1
Windshield Wiper Arm Bolts
M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value. Prevents loosening during use.
Fuel Door
1 Fuel Door Hinge Bolts
M6 x 1.0
1
Fuel Door Hinge Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (13.5 N·m)
Important Notes
Estimated value. Ensures smooth operation and prevents misalignment.
Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Brake Caliper
1 Brake Caliper Bolts
M12 x 1.5
1
Brake Caliper Bolts
M12 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Ensure the caliper is properly aligned before torquing. Estimated value based on typical M12 bolt torque.
2 Brake Caliper Mounting Bracket Bolts
M14 x 1.5
2
Brake Caliper Mounting Bracket Bolts
M14 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Ensure the bracket is properly seated before torquing. Estimated value based on typical M14 bolt torque.
Brake Rotor Drum
1 Brake Disc/Drum Retaining Bolts
M10 x 1.25
1
Brake Disc/Drum Retaining Bolts
M10 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Ensure the rotor or drum is properly seated before torquing. Estimated value based on typical M10 bolt torque.
Wheel Assembly
1 Wheel Lug Nuts
M12 x 1.5
1
Wheel Lug Nuts
M12 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Ensure the wheel is properly seated before torquing. Estimated value based on typical M12 bolt torque.
Brake Hydraulics
1 Brake Hose Banjo Bolt
M10 x 1.0
1
Brake Hose Banjo Bolt
M10 x 1.0
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Ensure the banjo bolt is properly aligned with the brake hose. Estimated value based on typical M10 bolt torque.
2 Brake Master Cylinder Mounting Bolts
M8 x 1.25
2
Brake Master Cylinder Mounting Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Ensure the master cylinder is properly seated before torquing. Estimated value based on typical M8 bolt torque.
3 Brake Booster Mounting Bolts
M8 x 1.25
3
Brake Booster Mounting Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Ensure the brake booster is properly seated before torquing. Estimated value based on typical M8 bolt torque.
4 Brake Line Fittings
M10 x 1.0
4
Brake Line Fittings
M10 x 1.0
Torque Specification
12.5 ft-lbs (16.9 N·m)
Important Notes
Ensure the fittings are properly aligned before torquing. Estimated value based on typical M10 bolt torque.
Parking Brake
1 Parking Brake Cable Bracket Bolts
M8 x 1.25
1
Parking Brake Cable Bracket Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Ensure the bracket is properly aligned before torquing. Estimated value based on typical M8 bolt torque.
Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Engine Transmission Interface
1 Flywheel Bolts
M10 x 1.25
1
Flywheel Bolts
M10 x 1.25
Torque Specification
62.5 ft-lbs (84.5 N·m)
Important Notes
Torque value is an average of the specified range (60-65 ft-lbs).
2 Transmission Bellhousing Bolts
M10 x 1.5
2
Transmission Bellhousing Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque value is an average of the specified range (35-45 ft-lbs).
Transmission Components
1 Transmission Mounting Bolts
M8 x 1.25
1
Transmission Mounting Bolts
M8 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque value is an average of the specified range (35-45 ft-lbs).
2 Transmission Oil Pan Bolts
M6 x 1.0
2
Transmission Oil Pan Bolts
M6 x 1.0
Torque Specification
13.5 ft-lbs (18 N·m)
Important Notes
Torque value is an average of the specified range (12-15 ft-lbs).
3 Transmission Drain and Fill Plugs
M12 x 1.75
3
Transmission Drain and Fill Plugs
M12 x 1.75
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Torque value is an average of the specified range (15-20 ft-lbs).
Driveshaft And Axles
1 Drive Axle/Half Shaft Bolts
M12 x 1.5
1
Drive Axle/Half Shaft Bolts
M12 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Torque value is an average of the specified range (70-80 ft-lbs).
2 CV Joint/Axle Nut
M24 x 1.5
2
CV Joint/Axle Nut
M24 x 1.5
Torque Specification
130 ft-lbs (176 N·m)
Important Notes
Torque value is an average of the specified range (120-140 ft-lbs).
3 Propeller/Drive Shaft Bolts
M8 x 1.25
3
Propeller/Drive Shaft Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Torque value is an average of the specified range (15-20 ft-lbs).
Differential And Transfer Case
1 Differential Cover Bolts
M8 x 1.25
1
Differential Cover Bolts
M8 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Torque value is an average of the specified range (20-25 ft-lbs).
2 Differential Drain/Fill Plug
M14 x 1.5
2
Differential Drain/Fill Plug
M14 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Torque value is an average of the specified range (25-35 ft-lbs).
3 Transfer Case Mounting Bolts
M10 x 1.5
3
Transfer Case Mounting Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque value is an average of the specified range (35-45 ft-lbs).
4 Transfer Case Drain/Fill Plug
M12 x 1.75
4
Transfer Case Drain/Fill Plug
M12 x 1.75
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Torque value is an average of the specified range (15-20 ft-lbs).
5 Transfer Case Output Shaft Flange Bolts
M12 x 1.5
5
Transfer Case Output Shaft Flange Bolts
M12 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Torque value is an average of the specified range (70-80 ft-lbs).
6 Rear Axle Pinion Flange Bolts
M12 x 1.5
6
Rear Axle Pinion Flange Bolts
M12 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Torque value is an average of the specified range (70-80 ft-lbs).
Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Ignition System
1 Ignition Coil Bolt
M6 x 1.0
1
Ignition Coil Bolt
M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure the ignition coil is properly seated before tightening. Over-torquing can damage the coil or mounting threads.
Starting System
1 Starter Motor Mounting Bolts
M10 x 1.5
1
Starter Motor Mounting Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure the starter motor is properly aligned with the engine flywheel before tightening. Over-torquing can damage the starter or engine block threads.
Charging System
1 Alternator Mounting Bolts
M10 x 1.5
1
Alternator Mounting Bolts
M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the alternator is properly aligned with the drive belt before tightening. Over-torquing can damage the alternator or mounting threads.
Battery System
1 Battery Terminal Nuts
M6 x 1.0
1
Battery Terminal Nuts
M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure the battery terminals are clean and free of corrosion before tightening. Over-torquing can damage the terminal posts or nuts.
Ac System
1 A/C Compressor Mounting Bolts
M10 x 1.5
1
A/C Compressor Mounting Bolts
M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the A/C compressor is properly aligned with the drive belt before tightening. Over-torquing can damage the compressor or mounting threads.
2 A/C Line Fittings
M8 x 1.25
2
A/C Line Fittings
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the A/C line fittings are properly seated before tightening. Over-torquing can damage the fittings or cause refrigerant leaks.
Grounding System
1 Ground Strap Bolts
M6 x 1.0
1
Ground Strap Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the ground strap is properly seated and free of corrosion before tightening. Over-torquing can damage the strap or mounting threads.
Fuse And Relay System
1 Fuse Box Mounting Bolts
M6 x 1.0
1
Fuse Box Mounting Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the fuse box is properly aligned with the mounting surface before tightening. Over-torquing can damage the fuse box or mounting threads.
Voltage Regulation System
1 Voltage Regulator Mounting Bolts
M6 x 1.0
1
Voltage Regulator Mounting Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the voltage regulator is properly aligned with the mounting surface before tightening. Over-torquing can damage the regulator or mounting threads.
Wiring Harness System
1 Wiring Harness Clamp Bolts
M6 x 1.0
1
Wiring Harness Clamp Bolts
M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure the wiring harness is properly routed and secured before tightening. Over-torquing can damage the clamps or mounting threads.
Lighting System
1 Headlight Mounting Bolts
M6 x 1.0
1
Headlight Mounting Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the headlight is properly aligned with the vehicle's body before tightening. Over-torquing can damage the headlight or mounting threads.
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Egr System
1 EGR Valve Bolts
M8 x 1.25
1
EGR Valve Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Torque value is an average of the provided range (15-20 ft-lbs).
Exhaust Manifold
1 Exhaust Manifold/Headers Bolts
M10 x 1.5
1
Exhaust Manifold/Headers Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40.5 N·m)
Important Notes
Torque value is an average of the provided range (25-35 ft-lbs).
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Torque value is an average of the provided range (20-25 ft-lbs).
Exhaust Pipe
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.5
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40.5 N·m)
Important Notes
Torque value is an average of the provided range (25-35 ft-lbs).
2 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
2
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40.5 N·m)
Important Notes
Torque value is an average of the provided range (25-35 ft-lbs).
Throttle Body
1 Throttle Body Bolts
M6 x 1.0
1
Throttle Body Bolts
M6 x 1.0
Torque Specification
13.5 ft-lbs (18 N·m)
Important Notes
Torque value is an average of the provided range (12-15 ft-lbs).
Oxygen Sensor
1 Oxygen Sensor Mounting Nut
M18 x 1.5
1
Oxygen Sensor Mounting Nut
M18 x 1.5
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Torque value is an average of the provided range (30-40 ft-lbs).
Heat Shield
1 Catalytic Converter Heat Shield Bolts
M6 x 1.0
1
Catalytic Converter Heat Shield Bolts
M6 x 1.0
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Torque value is an average of the provided range (15-20 ft-lbs).
Pcv System
1 PCV Valve Mounting Bolt
M6 x 1.0
1
PCV Valve Mounting Bolt
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Torque value is an average of the provided range (8-10 ft-lbs).
Air Injection System
1 Air Injection System Bolts
M8 x 1.25
1
Air Injection System Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Torque value is an average of the provided range (15-20 ft-lbs).
Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold Headers
1 Exhaust Manifold/Headers Bolts
M10 x 1.25
1
Exhaust Manifold/Headers Bolts
M10 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure and prevent warping.
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
Torque Specification
23 ft-lbs (31 N·m)
Important Notes
Estimated value based on similar bolt sizes and applications.
Exhaust Pipe Connections
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.25
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
2 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.25
2
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
3 Muffler to Exhaust Pipe Bolts
M10 x 1.25
3
Muffler to Exhaust Pipe Bolts
M10 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
Exhaust Support Components
1 Exhaust Hanger Bolts
M8 x 1.25
1
Exhaust Hanger Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on similar bolt sizes and applications.
2 Exhaust Flange Bolts
M10 x 1.25
2
Exhaust Flange Bolts
M10 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
3 Oxygen Sensor Mounting Bolts
M12 x 1.5
3
Oxygen Sensor Mounting Bolts
M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure sensor is properly seated before tightening.
4 Heat Shield Bolts
M6 x 1.0
4
Heat Shield Bolts
M6 x 1.0
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Estimated value based on similar bolt sizes and applications.
Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Fuel Rail System
1 Fuel Rail Bolts
M8 x 1.25
1
Fuel Rail Bolts
M8 x 1.25
Torque Specification
16.5 ft-lbs (22.4 N·m)
Important Notes
Torque value is the midpoint of the provided range (15-18 ft-lbs).
2 Fuel Injector Bolts
M6 x 1.0
2
Fuel Injector Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12.2 N·m)
Important Notes
Torque value is the midpoint of the provided range (8-10 ft-lbs).
Fuel Pump And Tank System
1 Fuel Pump Mounting Bolts
M10 x 1.5
1
Fuel Pump Mounting Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Torque value is the midpoint of the provided range (25-35 ft-lbs).
2 Fuel Tank Strap Bolts
M12 x 1.75
2
Fuel Tank Strap Bolts
M12 x 1.75
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Torque value is the midpoint of the provided range (35-45 ft-lbs).
3 Fuel Tank Sending Unit Bolts
M6 x 1.0
3
Fuel Tank Sending Unit Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12.2 N·m)
Important Notes
Torque value is estimated based on similar M6 bolts in the fuel system.
Fuel Delivery And Filtration
1 Fuel Filter Bolt/Nut
M8 x 1.25
1
Fuel Filter Bolt/Nut
M8 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Torque value is the midpoint of the provided range (15-20 ft-lbs).
2 Fuel Pressure Regulator Bolts
M6 x 1.0
2
Fuel Pressure Regulator Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12.2 N·m)
Important Notes
Torque value is estimated based on similar M6 bolts in the fuel system.
Fuel Vapor Management
1 Fuel Vapor Canister Bolts
M8 x 1.25
1
Fuel Vapor Canister Bolts
M8 x 1.25
Torque Specification
13.5 ft-lbs (18.3 N·m)
Important Notes
Torque value is the midpoint of the provided range (12-15 ft-lbs).
2 Fuel Filler Neck Bolts
M8 x 1.25
2
Fuel Filler Neck Bolts
M8 x 1.25
Torque Specification
13.5 ft-lbs (18.3 N·m)
Important Notes
Torque value is the midpoint of the provided range (12-15 ft-lbs).
Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
Ac Compressor
1 A/C Compressor Mounting Bolts
M10 x 1.25
1
A/C Compressor Mounting Bolts
M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute load.
Ac Lines
1 A/C Line Fittings
M8 x 1.0
1
A/C Line Fittings
M8 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Use a backup wrench to prevent twisting of the refrigerant lines.
Evaporator
1 Evaporator Housing Bolts
M6 x 1.0
1
Evaporator Housing Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on similar components. Ensure housing is properly aligned before tightening.
Blower Motor
1 Blower Motor Mounting Bolts
M6 x 1.0
1
Blower Motor Mounting Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on similar components. Ensure motor is properly aligned before tightening.
Heater Core
1 Heater Core Inlet/Outlet Fittings
M8 x 1.0
1
Heater Core Inlet/Outlet Fittings
M8 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure fittings are clean and free of debris before installation.
Condenser
1 Condenser Mounting Bolts
M8 x 1.0
1
Condenser Mounting Bolts
M8 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure condenser is properly aligned with the radiator before tightening.
Expansion Valve
1 Expansion Valve or Orifice Tube Fittings
M8 x 1.0
1
Expansion Valve or Orifice Tube Fittings
M8 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure fittings are clean and free of debris before installation.
Control Panel
1 HVAC Control Panel Mounting Bolts
M5 x 0.8
1
HVAC Control Panel Mounting Bolts
M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on similar components. Use caution to avoid overtightening.
Suspension
Torque specifications for Suspension
Suspension
Torque specifications for Suspension
Strut Shock Absorber
1 Upper Strut Mount Bolts
M10 x 1.25
1
Upper Strut Mount Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on typical M10 bolt torque for suspension components.
2 Lower Shock Absorber Mounting Bolts
M12 x 1.5
2
Lower Shock Absorber Mounting Bolts
M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on typical M12 bolt torque for suspension components.
Control Arm Ball Joint
1 Control Arm Bolts
M14 x 1.5
1
Control Arm Bolts
M14 x 1.5
Torque Specification
1. 80 ft-lbs (108 N·m)
2. 90°
Important Notes
Torque sequence and angle tightening are critical for proper clamping force.
2 Ball Joint Nut
M12 x 1.25
2
Ball Joint Nut
M12 x 1.25
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated value based on typical M12 bolt torque for suspension components.
Steering Components
1 Tie Rod End Nut
M10 x 1.25
1
Tie Rod End Nut
M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on typical M10 bolt torque for steering components.
2 Steering Gear/Rack Bolts
M14 x 1.5
2
Steering Gear/Rack Bolts
M14 x 1.5
Torque Specification
1. 90 ft-lbs (122 N·m)
2. 45°
Important Notes
Torque sequence and angle tightening are critical for proper clamping force.
Sway Bar Track Bar
1 Sway Bar Link Nut
M10 x 1.25
1
Sway Bar Link Nut
M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on typical M10 bolt torque for sway bar components.
2 Track Bar/Stabilizer Bar Mounting Bolts
M12 x 1.5
2
Track Bar/Stabilizer Bar Mounting Bolts
M12 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Estimated value based on typical M12 bolt torque for track bar components.
Leaf Spring U Bolts
1 Leaf Spring U-Bolts
M14 x 1.5
1
Leaf Spring U-Bolts
M14 x 1.5
Torque Specification
1. 80 ft-lbs (108 N·m)
2. 90°
Important Notes
Torque sequence and angle tightening are critical for proper clamping force.
Steering Knuckle
1 Steering Knuckle Bolts
M14 x 1.5
1
Steering Knuckle Bolts
M14 x 1.5
Torque Specification
1. 100 ft-lbs (136 N·m)
2. 90°
Important Notes
Torque sequence and angle tightening are critical for proper clamping force.
Wheel Lug Nuts
1 Wheel Lug Nuts
M12 x 1.5
1
Wheel Lug Nuts
M12 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Always use a star pattern when tightening lug nuts.
Th350 Transmission
Torque specifications for Th350 Transmission
Th350 Transmission
Torque specifications for Th350 Transmission
Transmission Mounting
1 Transmission Mounting Bolts
M10 x 1.5
1
Transmission Mounting Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure crossmember is properly aligned before tightening.
Oil Pan
1 Transmission Oil Pan Bolts
M6 x 1.0
1
Transmission Oil Pan Bolts
M6 x 1.0
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Use a new gasket and ensure the pan surface is clean.
Fluid Plugs
1 Transmission Drain Plug
M12 x 1.75
1
Transmission Drain Plug
M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the plug is properly sealed to prevent leaks.
2 Transmission Fill Plug
M12 x 1.75
2
Transmission Fill Plug
M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the plug is properly sealed to prevent leaks.
Flywheel
1 Flywheel Bolts
M10 x 1.25
1
Flywheel Bolts
M10 x 1.25
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Ensure the flywheel is properly aligned with the crankshaft.
Torque Converter
1 Torque Converter Bolts
M8 x 1.25
1
Torque Converter Bolts
M8 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the torque converter is properly seated before tightening.
Bell Housing
1 Bell Housing Bolts
M10 x 1.5
1
Bell Housing Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the bell housing is properly aligned with the engine block.
Shift Linkage
1 Shift Linkage Bolts
M6 x 1.0
1
Shift Linkage Bolts
M6 x 1.0
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Ensure the linkage is properly aligned before tightening.
Cooler Lines
1 Transmission Cooler Line Fittings
M12 x 1.5
1
Transmission Cooler Line Fittings
M12 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the fittings are properly sealed to prevent leaks.
Tail Housing
1 Tail Housing Bolts
M8 x 1.25
1
Tail Housing Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure the tail housing is properly aligned with the transmission case.
Th400 Transmission
Torque specifications for Th400 Transmission
Th400 Transmission
Torque specifications for Th400 Transmission
Transmission Mounting
1 Transmission Mounting Bolts
M10 x 1.5
1
Transmission Mounting Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque evenly in a crisscross pattern to ensure proper alignment.
Oil Pan
1 Transmission Oil Pan Bolts
M6 x 1.0
1
Transmission Oil Pan Bolts
M6 x 1.0
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Torque evenly in a crisscross pattern to prevent warping of the oil pan.
Fluid Plugs
1 Transmission Drain Plug
M12 x 1.75
1
Transmission Drain Plug
M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the plug is clean and the sealing washer is in good condition.
2 Transmission Fill Plug
M12 x 1.75
2
Transmission Fill Plug
M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the plug is clean and the sealing washer is in good condition.
Flywheel
1 Flywheel Bolts
M10 x 1.25
1
Flywheel Bolts
M10 x 1.25
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Torque evenly in a star pattern to ensure proper alignment.
Drive Shaft
1 Drive Shaft Bolts
M8 x 1.25
1
Drive Shaft Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Torque evenly in a crisscross pattern to ensure proper alignment.
Starter Motor
1 Starter Motor Mounting Bolts
M8 x 1.25
1
Starter Motor Mounting Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel before torquing.
Torque Converter
1 Torque Converter Bolts
M8 x 1.25
1
Torque Converter Bolts
M8 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque evenly in a star pattern to ensure proper alignment.
Bellhousing
1 Bellhousing Bolts
M10 x 1.5
1
Bellhousing Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque evenly in a crisscross pattern to ensure proper alignment.
Transmission Case
1 Transmission Case Bolts
M8 x 1.25
1
Transmission Case Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Torque evenly in a crisscross pattern to ensure proper sealing.
Shift Linkage
1 Shift Linkage Bolts
M6 x 1.0
1
Shift Linkage Bolts
M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the shift linkage is properly aligned before torquing.
Cooler Lines
1 Transmission Cooler Line Fittings
M12 x 1.5
1
Transmission Cooler Line Fittings
M12 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the fittings are clean and the sealing surfaces are in good condition.
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Loose Components
Symptoms:
- Rattling or vibration noises
- Visible movement in components
- Uneven panel gaps
Solutions:
- Clean threads and mounting surfaces
- Replace damaged fasteners
- Apply proper torque in sequence
- Use thread locker if specified
Stripped Fasteners
Symptoms:
- Unable to achieve proper torque
- Fastener spins freely
- Visible thread damage
Solutions:
- Use thread repair kit if appropriate
- Install thread insert (HeliCoil)
- Replace component if threaded hole is damaged
- Upgrade to higher grade fastener if recommended
Overtightened Components
Symptoms:
- Cracked or deformed parts
- Broken fasteners
- Compressed gaskets or seals
Solutions:
- Replace damaged components
- Use new fasteners
- Follow proper torque sequence
- Verify correct torque specifications
Diagnostic Steps
Visual inspection, torque verification, thread assessment
Diagnostic Steps
Visual inspection, torque verification, thread assessment
1
Visual Inspection
Inspect the affected area for any visible signs of damage or wear
- Check for cracks or deformation
- Look for signs of excessive wear
- Verify proper fastener installation
2
Torque Verification
Verify the torque applied to the fasteners
- Check the torque wrench calibration
- Verify the torque specification
- Compare the applied torque to the specification
3
Thread Assessment
Assess the condition of the threads
- Check for signs of thread damage
- Verify the thread type and size
- Check for proper thread engagement
Prevention Guidelines
Best practices, maintenance tips, tool care
Prevention Guidelines
Best practices, maintenance tips, tool care
Best Practices
- Always follow the recommended torque specification
- Use the correct type and size of fasteners
- Verify the torque wrench calibration regularly
Maintenance Tips
- Regularly inspect the affected area for signs of wear or damage
- Replace damaged or worn-out components promptly
- Keep the work area clean and organized
Tool Care
- Regularly clean and maintain the torque wrench
- Store the torque wrench in a dry and secure location
- Verify the torque wrench calibration before each use
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What IS the proper torque specification for a 1985 GMC Jimmy wheel lug nut?
Q1
What IS the proper torque specification for a 1985 GMC Jimmy wheel lug nut?
100 ft-lbs (135 Nm)
Q2 How do I tighten cylinder head bolts to the correct torque using a torque wrench?
Q2
How do I tighten cylinder head bolts to the correct torque using a torque wrench?
Follow a star pattern in three stages: 30 ft-lbs (40 Nm), 60 ft-lbs (80 Nm), and 90 ft-lbs (120 Nm).
Q3 Can I use a regular wrench to tighten bolts if I don't have a torque wrench?
Q3
Can I use a regular wrench to tighten bolts if I don't have a torque wrench?
No. A torque wrench IS calibrated to provide precise torque values, which are critical for tightening bolts correctly.
Q4 What happens if I overtighten a bolt?
Q4
What happens if I overtighten a bolt?
Overtightening can stretch or break the bolt, damage threads, and cause premature failure.
Q5 What IS the torque specification for a 1991 GMC Jimmy intake manifold bolt?
Q5
What IS the torque specification for a 1991 GMC Jimmy intake manifold bolt?
15 ft-lbs (20 Nm)
Q6 How can I prevent rounded bolts during torque application?
Q6
How can I prevent rounded bolts during torque application?
Use the correct socket size, ensure bolts are clean, and apply a small amount of penetrating oil.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature can significantly impact torque values and fastener behavior
Cold Weather
Effects:
- Increased material brittleness
- Higher torque required due to thread contraction
- Reduced thread lubricant effectiveness
Recommendations:
- Allow components to warm to room temperature when possible
- Consider using winter-grade thread lubricants
- Check torque values more frequently during winter months
Hot Weather
Effects:
- Thermal expansion of components
- Decreased friction in threads
- Accelerated lubricant breakdown
Recommendations:
- Check torque when components are at normal operating temperature
- Use temperature-resistant thread lockers
- Consider re-torquing after heat cycles
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Moisture and corrosion can affect fastener integrity and torque values
High Humidity
Effects:
- Accelerated corrosion formation
- Reduced friction coefficient
- Potential thread seizing
Prevention:
- Use corrosion-resistant fasteners
- Apply appropriate anti-seize compounds
- Maintain proper protective coatings
Salt Exposure
Effects:
- Rapid corrosion development
- Thread damage
- Seized fasteners
Prevention:
- Regular underbody washing
- Use of sacrificial anodes where appropriate
- Application of protective coatings
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Spring
- Inspect for winter damage
- Clean and protect exposed fasteners
- Check torque on critical components
Summer
- Monitor heat-affected components
- Check expansion-related loosening
- Inspect cooling system mounts
Fall
- Prepare for winter conditions
- Apply corrosion protection
- Verify all fasteners are properly torqued
Winter
- More frequent inspection of critical fasteners
- Check for salt damage
- Monitor suspension component torque
Related Resources
Tools, service procedures, and technical bulletins
Recommended Tools
Digital Torque Wrench (10-100 Nm)
Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the Jimmy.
- Digital display for accurate readings
- Audible alarm when target torque IS reached
- Multiple units (Nm, ft-lb, in-lb)
- Reversible ratcheting mechanism
Service Procedures
Bolt Torque Specifications for 1970-1991 GMC Jimmy
This procedure outlines the recommended bolt torque specifications for various components on the 1970-1991 GMC Jimmy.
- Refer to the vehicle service manual for specific torque values for each component.
- Use a calibrated digital torque wrench to ensure accurate tightening.
- Clean and inspect all threads before assembly.
- Apply anti-seize compound to prevent galling and corrosion.
- Tighten bolts in sequence to prevent warping or damage.
- Double-check all torqued bolts to ensure proper assembly.
Technical Service Bulletins
Legal Disclaimer
Important information about using this content
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General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
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We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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