Jeep 4.0 Engine Specifications
The Jeep 4.0 engine, also known as the AMC 4.0, is a well-regarded inline-six engine that has been a staple in various Jeep models. Its robust design and reliable performance have made it a favorite among off-road enthusiasts and everyday drivers alike. Below are the detailed specifications of the Jeep 4.0 engine.
| Specification | Details |
|---|---|
| Engine Type | Inline 6-cylinder |
| Displacement | 4.0 liters (242 cubic inches) |
| Horsepower | 190 hp @ 4,600 RPM |
| Torque | 235 lb-ft @ 3,200 RPM |
| Compression Ratio | 8.8:1 |
| Fuel System | Multi-port fuel injection |
| Fuel Type | Regular unleaded (87 octane) |
| Ignition System | Distributor-less ignition system (DIS) |
| Cooling System | Water-cooled |
| Weight | Approximately 450 lbs |
Engine Configuration
The Jeep 4.0 engine features a classic inline-six configuration, which is known for its smooth operation and balanced performance. This configuration contributes to the engine’s durability and reliability, making it suitable for both on-road and off-road applications.
Key Features of the Engine Configuration
- Inline-six design provides excellent torque characteristics.
- Long stroke design enhances low-end torque, ideal for off-road situations.
- Robust construction with iron block and aluminum head for durability.
- Multi-port fuel injection system for improved fuel efficiency and performance.
- Distributor-less ignition system for enhanced reliability and easier maintenance.
Engine Oil Specifications
Proper lubrication is crucial for the longevity and performance of the Jeep 4.0 engine. The following are the recommended engine oil specifications:
| Specification | Details |
|---|---|
| Oil Type | Synthetic or conventional oil |
| Viscosity | 5W-30 or 10W-30 |
| Oil Capacity (with filter) | 6 quarts (5.7 liters) |
| Oil Filter | Standard oil filter compatible with Jeep 4.0 |
Choosing the Right Engine Oil
- Consider the climate: Use 5W-30 for colder climates and 10W-30 for warmer conditions.
- Check for API certification: Ensure the oil meets or exceeds the API service classification.
- Choose synthetic oil for better performance and extended intervals.
Service Intervals
Regular maintenance is essential for keeping the Jeep 4.0 engine running smoothly. Below are the recommended service intervals for oil changes and other maintenance tasks.
| Service Task | Interval |
|---|---|
| Oil Change | Every 3,000 to 5,000 miles or every 3 to 6 months |
| Oil Filter Replacement | With every oil change |
| Air Filter Replacement | Every 15,000 to 30,000 miles |
| Spark Plug Replacement | Every 30,000 miles |
| Coolant Flush | Every 2 years or 24,000 miles |
| Transmission Fluid Change | Every 30,000 to 60,000 miles |
Additional Maintenance Tips
- Regularly check fluid levels, including coolant, brake fluid, and power steering fluid.
- Inspect belts and hoses for wear and replace as necessary.
- Keep the engine clean to prevent overheating and other issues.
Conclusion
The Jeep 4.0 engine is a testament to durability and performance, making it a popular choice among Jeep enthusiasts. Understanding its specifications, engine configuration, oil requirements, and service intervals is crucial for maintaining its performance and longevity. Regular maintenance and the right choice of engine oil will ensure that your Jeep 4.0 engine continues to deliver reliable performance for years to come.
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