GMC Terrain 2010-2017 2.4L Engine Bolt Torque Specifications & Fastener Values
GMC Terrain 2010-2017

GMC Terrain 2010-2017 2.4L Engine Bolt Torque Specifications

Detailed torque specifications for bolts in the 2.4L engine of the 2010-2017 GMC Terrain, including cylinder head, intake manifold, and exhaust manifold bolts.

Updated

Important Information

Safety guidelines and reference information for proper torque application

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

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

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

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

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

Cylinder head and valve train

Components that secure the cylinder head, valve cover, and valve train to the engine block.

1

Cylinder Head Bolts

M12 x 1.5
Torque Value
18 ft-lbs (25 N·m)
2

Valve Cover Bolts

M8 x 1.25
Torque Value
8 ft-lbs (10 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Value
89 in-lbs (10 N·m)
Important Notes
Estimated torque value based on similar components.

Engine block and main bearings

Components that secure the main bearings and engine block to the crankshaft.

1

Main Bearing Bolts

M14 x 2.0
Torque Value
70 ft-lbs (95 N·m)
2

Engine Block Heater Bolt

M10 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Estimated torque value based on general industry standards.

Crankshaft and connecting rods

Components that secure the connecting rods and crankshaft to the engine block.

1

Connecting Rod Nuts

M12 x 1.5
Torque Value
40 ft-lbs (55 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Value
134 ft-lbs (182 N·m)

Timing system

Components that secure the timing belt/chain and tensioner to the engine block.

1

Timing Belt/Chain Tensioner Bolt

M12 x 1.5
Torque Value
33 ft-lbs (45 N·m)
2

Camshaft Sprocket Bolt

M14 x 2.0
Torque Value
45 ft-lbs (61 N·m)

Intake and exhaust systems

Components that secure the intake manifold, exhaust manifold, and throttle body to the engine block.

1

Intake Manifold Bolts

M10 x 1.5
Torque Value
89 in-lbs (10 N·m)
Important Notes
Estimated torque value based on similar components.
2

Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Value
37 ft-lbs (50 N·m)
3

Throttle Body Bolts

M8 x 1.25
Torque Value
89 in-lbs (10 N·m)
Important Notes
Estimated torque value based on similar components.

Fuel system

Components that secure the fuel rail, fuel injectors, and fuel filter to the engine block.

1

Fuel Rail Bolts

M10 x 1.5
Torque Value
89 in-lbs (10 N·m)
Important Notes
Estimated torque value based on similar components.
2

Fuel Injector Bolts

M8 x 1.25
Torque Value
89 in-lbs (10 N·m)
Important Notes
Estimated torque value based on similar components.
3

Oil Filter Housing Bolt

M12 x 1.5
Torque Value
18 ft-lbs (25 N·m)
4

Oil Drain Plug Bolt

M12 x 1.5
Torque Value
18 ft-lbs (25 N·m)

Ignition system

Components that secure the ignition coil, spark plugs, and ignition module to the engine block.

1

Ignition Coil Bolt

M10 x 1.5
Torque Value
89 in-lbs (10 N·m)
Important Notes
Estimated torque value based on similar components.
2

Spark Plugs

M14 x 1.25
Torque Value
15 ft-lbs (20 N·m)

Engine mounts and accessories

Components that secure the engine mounts, accessory belt tensioner, and water pump to the engine block.

1

Engine Mounting Bolts

M14 x 2.0
Torque Value
50 ft-lbs (68 N·m)
Important Notes
Estimated torque value based on general industry standards.
2

Accessory Belt Tensioner Bolt

M12 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Estimated torque value based on general industry standards.
3

Water Pump Bolts

M10 x 1.5
Torque Value
89 in-lbs (10 N·m)
Important Notes
Estimated torque value based on similar components.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

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

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

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 are the torque specifications for the 2.4L engine bolts in a 2010-2017 GMC Terrain?

The torque specifications vary depending on the specific bolt. For example, cylinder head bolts typically require 25-30 ft-lbs in the initial sequence, followed by a final torque of 60-65 ft-lbs. Always refer to the manufacturer's service manual for exact values.

Q2

How often should I check the torque of engine bolts?

Engine bolts should be checked during routine maintenance, such as every 10,000 miles or annually. Additionally, inspect them after any major engine work or if you notice unusual engine noises or vibrations.

Q3

Can I use a generic torque wrench for these bolts?

Yes, but ensure the torque wrench is calibrated and capable of handling the required torque range. Using a low-quality or uncalibrated wrench can lead to improper tightening, risking engine damage.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

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

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

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

Torque Wrench

Precision torque wrench for accurate bolt tightening

  • Adjustable torque settings
  • Durable construction
Learn more

Bolt Tightening Gauge

Tool to measure bolt tightness and ensure proper torque

  • Digital display
  • Calibration feature
Learn more
Service Procedures

Engine Bolt Torque Application

Step-by-step guide for applying correct torque to engine bolts

  • Clean all bolt surfaces before tightening
  • Apply torque gradually to specified value using torque wrench
View full procedure

Engine Bolt Inspection

Procedure for inspecting engine bolts for proper torque

  • Use bolt tightening gauge to check tightness
  • Re-torque bolts if below specifications
View full procedure
Technical Service Bulletins

Engine Bolt Torque Specifications Update

2015-06-15

Updated torque specifications for 2.4L engine bolts

2010-2017 GMC Terrain

Resolution: Follow updated torque specifications in service manual

Engine Bolt Failure Analysis

2013-11-20

Analysis of engine bolt failures due to incorrect torque

2010-2017 GMC Terrain

Resolution: Ensure proper torque application during service

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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