GMC Envoy 1998-2000 4.3L Engine Specifications
Explore the detailed 4.3L engine specifications for the 1998-2000 GMC Envoy. This guide covers horsepower, torque, fuel system, and more, ideal for maintenance, repairs, and performance upgrades.
Overview Specifications
This document provides detailed specifications and technical information about the 4.3L engine used in the 1998-2000 GMC Envoy. It is designed to assist users in understanding the engine's features, performance, and maintenance requirements. The document is organized into sections for easy navigation, with subsections breaking down specific aspects of the engine. Use the search and navigation instructions to quickly find the information you need.
How to Use
Use the search functionality to locate specific terms or phrases within the document. Enter keywords related to the engine's specifications, performance, or maintenance to find relevant sections quickly.
Navigate through the document using the section titles and subsections. Each major section is divided into detailed subsections, allowing you to find specific information about the 4.3L engine efficiently.
Key Specifications
Displacement
4.3L
Horsepower
190 hp
Torque
250 lb-ft
Fuel System
MPFI
Compression Ratio
9.1:1
Available Specifications
Engine Specifications
This section covers the core specifications of the 4.3L engine, including its displacement, configuration, and key performance metrics. It provides a detailed breakdown of the engine's technical attributes.
Engine Specifications
This section covers the core specifications of the 4.3L engine, including its displacement, configuration, and key performance metrics. It provides a detailed breakdown of the engine's technical attributes.
General Specifications
- Displacement: 4.3 liters (262 cubic inches)
- Configuration: V6
- Bore x Stroke: 4.00 in x 3.48 in
- Compression Ratio: 9.1:1
- Fuel System: Sequential Multi-Port Fuel Injection
- Valvetrain: Overhead Valve (OHV)
Performance Metrics
- Horsepower: 190 hp @ 4400 rpm
- Torque: 250 lb-ft @ 2800 rpm
- Fuel Type: Regular Unleaded
- Oil Capacity: 4.5 quarts (with filter)
- Coolant Capacity: 13.5 quarts
Maintenance and Service
This section provides information on maintaining and servicing the 4.3L engine. It includes details on oil changes, coolant replacement, and other routine maintenance tasks to ensure optimal engine performance.
Maintenance and Service
This section provides information on maintaining and servicing the 4.3L engine. It includes details on oil changes, coolant replacement, and other routine maintenance tasks to ensure optimal engine performance.
Routine Maintenance
- Oil Change Interval: Every 3,000-5,000 miles
- Oil Type: 5W-30 or 10W-30
- Coolant Type: Ethylene Glycol-based
- Spark Plug Gap: 0.060 inches
- Timing Chain: Non-adjustable, long-lasting
Common Service Tasks
- Replace Air Filter: Every 15,000-30,000 miles
- Replace Fuel Filter: Every 30,000 miles
- Inspect Belts and Hoses: Every 12,000 miles
- Check Engine Light Diagnostics: Use OBD-II scanner
Design and Features
This section highlights the design features and technologies incorporated into the 4.3L engine. It covers aspects such as the engine block, cylinder heads, and advanced systems that contribute to its performance and reliability.
Design and Features
This section highlights the design features and technologies incorporated into the 4.3L engine. It covers aspects such as the engine block, cylinder heads, and advanced systems that contribute to its performance and reliability.
Engine Block and Components
- Material: Cast Iron Block
- Cylinder Head Material: Cast Aluminum
- Pistons: Forged Aluminum
- Crankshaft: Nodular Iron
- Connecting Rods: Powdered Metal
Advanced Systems
- Ignition System: Distributorless Ignition System (DIS)
- Emission Control: EGR and Catalytic Converter
- Cooling System: Crossflow Radiator
- Lubrication System: Full-Pressure, Gear-Type Pump
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Engine Specifications
Overview
- Type
- V6
- Configuration
- 60-degree V
- Displacement
- 4.3 liters (262 cubic inches)
- Aspiration
- Naturally aspirated
- Fuel System
- Sequential fuel injection
- Location
- Front longitudinal
Dimensions
- Length
- 27.5 inches (698.5 mm)
- Width
- 24.8 inches (630 mm)
- Height
- 26.3 inches (668 mm)
- Weight
- 450 lbs (204 kg)
- Bore
- 4.0 inches (101.6 mm)
- Stroke
- 3.48 inches (88.4 mm)
- Compression Ratio
- 9.2:1
- Oil Capacity
- 4.5 quarts (4.26 liters)
Materials
- Block
- Cast iron
- Cylinder Heads
- Aluminum
- Pistons
- Aluminum alloy
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Ignition System
-
- Distributorless ignition system (DIS)
- Waste spark ignition
- Electronic spark timing
- Fuel System
-
- Sequential fuel injection
- Returnless fuel system
- Electronic throttle control
- Cooling System
-
- Cross-flow radiator
- Electric cooling fan
- Thermostatically controlled
- Emissions
-
- EGR (Exhaust Gas Recirculation)
- Catalytic converter
- OBD-II compliant
- Performance
-
- Horsepower: 190 hp @ 4400 rpm
- Torque: 250 lb-ft @ 2800 rpm
- Redline: 5000 rpm
Safety Features
- Engine Protection
-
- Low oil pressure warning
- Overheat warning
- Engine knock sensor
- Emissions Control
-
- Catalytic converter
- EGR system
- Evaporative emissions system
Comfort Features
- Noise Reduction
-
- Balanced crankshaft
- Hydraulic lifters
- Acoustic engine cover
- Vibration Control
-
- Rubber engine mounts
- Harmonic balancer
- Dual-mass flywheel
Accessories
- Belts And Pulleys
-
- Serpentine belt
- Tensioner pulley
- Idler pulley
- Filters
-
- Oil filter
- Air filter
- Fuel filter
- Sensors
-
- Oxygen sensor
- Coolant temperature sensor
- Crankshaft position sensor
Maintenance
- Service interval
- Every 7,500 miles or 6 months
- Service Items
-
- Oil and filter change
- Spark plug replacement
- Air filter inspection
- Coolant flush
- Timing chain inspection
- Maintenance Notes
- Use synthetic oil for extended intervals. Check for oil leaks regularly.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Engine and transmission
- Emissions
- Miles: 50,000Years: 4Coverage: Catalytic converter and sensors
- Corrosion
- Miles: 100,000Years: 6Coverage: Perforation only
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Casting for engine block
- CNC machining for cylinder heads
- Assembly line production
- Quality Control
- inspection: 100% engine testingTolerances: 0.0001 inches for critical componentsTesting: Dyno testing for performance
- Sustainability Practices
-
- Recycled materials in casting
- Low-emission manufacturing
- Energy-efficient assembly
- Production Metrics
- Units Per Day: 500Defect Rate: 0.1%Lead Time: 2 weeks
Service Information for 4.3l engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Inspect belts and hoses
- Check coolant level
- Inspect spark plugs
- Check for oil leaks
Use synthetic oil for extended intervals.
- Replace air filter
- Inspect fuel system
- Check ignition system
- Inspect exhaust system
- Test emissions system
Ensure all sensors are functioning properly.
- Replace spark plugs
- Flush cooling system
- Inspect timing chain
- Replace fuel filter
- Check engine mounts
Critical to replace timing chain if signs of wear are present.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 4.3L engine compatible with other GMC models from 1998-2000?
Is the 4.3L engine compatible with other GMC models from 1998-2000?
The 4.3L V6 engine used in the 1998-2000 GMC Envoy is specifically designed for this model. While it shares some components with other GM vehicles, direct compatibility with other models may vary. Always verify engine codes and specifications before attempting installation in a different vehicle. Consult the service manual or a certified technician for precise compatibility details.
Q2 What are the maintenance requirements for the 4.3L engine?
What are the maintenance requirements for the 4.3L engine?
Regular maintenance for the 4.3L engine includes oil changes every 3,000-5,000 miles, air filter replacement every 15,000 miles, and spark plug replacement every 30,000 miles. Additionally, inspect the timing belt, coolant, and fuel system periodically. Adhering to the manufacturer’s recommended maintenance schedule ensures optimal performance and longevity of the engine.
Q3 How do I replace the 4.3L engine in my GMC Envoy?
How do I replace the 4.3L engine in my GMC Envoy?
Replacing the 4.3L engine involves disconnecting the battery, draining fluids, and removing components like the exhaust manifold, transmission, and wiring harness. Use an engine hoist to remove the old engine and install the new one. Reassemble all components, refill fluids, and test the engine. Refer to the service manual for detailed instructions or consult a professional mechanic.
Q4 What should I do if my 4.3L engine overheats?
What should I do if my 4.3L engine overheats?
If the 4.3L engine overheats, immediately turn off the vehicle and allow it to cool. Check coolant levels and inspect for leaks. Ensure the radiator fan is functioning and the thermostat is operational. If the issue persists, it could indicate a faulty water pump or blocked radiator. Seek professional assistance if necessary to avoid further damage.
Q5 How can I optimize the performance of my 4.3L engine?
How can I optimize the performance of my 4.3L engine?
To optimize performance, use high-quality synthetic oil, replace air filters regularly, and ensure the fuel system is clean. Upgrading the exhaust system and using a performance chip can enhance power. Regularly check and maintain ignition components like spark plugs and wires. Driving habits, such as avoiding excessive idling, also contribute to improved engine efficiency.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1998-2000 GMC Envoy Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and troubleshooting for the 4.3L engine and other components.
Technical Service Bulletin for 4.3L Engine
Coming SoonDetails common issues, updates, and fixes for the 4.3L engine in 1998-2000 GMC Envoy models.
GMC Envoy Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts compatible with the 1998-2000 GMC Envoy and its 4.3L engine.
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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.
- 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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