Jeep Wrangler 4.0 Engine Specifications
The Jeep Wrangler 4.0 engine is a well-regarded powerplant known for its durability and performance. This inline-six engine has been a popular choice among off-road enthusiasts and daily drivers alike. Below are the detailed specifications of the 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 |
| Bore x Stroke | 3.88 in x 3.41 in |
| Fuel System | Multi-port fuel injection |
| Ignition System | Distributor ignition |
| Fuel Type | Regular unleaded gasoline |
| Max RPM | 5,000 RPM |
Engine Configuration
The Jeep Wrangler 4.0 engine is designed with several features that enhance its performance and reliability. Understanding the engine configuration is essential for maintenance and upgrades.
Key Features
- Inline Configuration: The inline-six layout provides a balance of power and smooth operation.
- Cast Iron Block: The engine block is made from cast iron, which contributes to durability and longevity.
- Aluminum Cylinder Head: The use of aluminum for the cylinder head helps reduce weight and improve heat dissipation.
- Overhead Valve (OHV) Design: The OHV configuration simplifies the design and reduces the number of moving parts.
- Long Stroke: The long stroke design enhances torque delivery, making it suitable for off-road applications.
Engine Oil Specifications & Service Intervals
Proper maintenance of the Jeep Wrangler 4.0 engine includes regular oil changes and using the correct oil specifications. This section outlines the recommended oil types and service intervals.
Oil Specifications
| Specification | Details |
|---|---|
| Oil Type | SAE 10W-30 or SAE 10W-40 |
| Oil Capacity (with filter) | 6 quarts (5.7 liters) |
| Oil Filter | Chrysler part number 53010447AA or equivalent |
| Oil Change Interval | 3,000 to 5,000 miles (4,800 to 8,000 km) depending on driving conditions |
Service Intervals
Regular maintenance is crucial for the longevity of the Jeep Wrangler 4.0 engine. Here are the recommended service intervals:
- Oil Change: Every 3,000 to 5,000 miles or every 3 to 6 months.
- Air Filter Replacement: Every 15,000 to 30,000 miles, depending on driving conditions.
- Fuel Filter Replacement: Every 30,000 miles.
- Spark Plug Replacement: Every 30,000 to 60,000 miles.
- Coolant Flush: Every 30,000 miles or as needed.
Conclusion
The Jeep Wrangler 4.0 engine is a robust and reliable choice for those who demand performance both on and off the road. By understanding its specifications, configuration, and maintenance requirements, owners can ensure their engine remains in optimal condition for years to come. Regular oil changes and adherence to service intervals are essential for maintaining the engine’s performance and longevity.
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