AMC Jeep 258 Master Rebuild Kit 4.2L 1971–1990
$567.20
Part Number: MKJ258F
Complete Master Rebuild Kit for AMC Jeep 4.2L 258 Inline 6 Engines (1971–1990)
This AMC Jeep 258 master rebuild kit includes multiple piston, ring, rod, and bearing size options to match your engine build.
✔ Includes: pistons, rings, bearings, gaskets, camshaft, lifters, timing set & oil pump
⚠️ Fitment Notice: Engine variations exist. Confirm engine type, sizes, and compatibility before ordering.
Description
AMC Jeep 258 Master Rebuild Kit – 4.2L Inline 6
Restore performance and reliability with this AMC Jeep 258 master rebuild kit, designed for 4.2L inline 6 engines used in Jeep vehicles from 1971–1990. This complete AMC Jeep 258 master rebuild kit is built for stock rebuilds, restoration projects, and long-term durability.
The 258 inline 6 is well known for its torque, simplicity, and dependable service life, making it a popular choice for both restoration and off-road builds.
The AMC 258 inline 6 was widely used in Jeep CJ, Wrangler, Cherokee, and Wagoneer models, making it one of the most recognizable Jeep rebuild platforms.
Browse additional options on our engine rebuild kits hub page to find the right kit for your build.
What’s Included in This AMC Jeep 258 Master Rebuild Kit
This AMC Jeep 258 master rebuild kit includes the essential components needed for a complete and reliable engine rebuild.
- Piston Set
- Piston Ring Set
- Rod Bearing Set
- Main Bearing Set
- Cam Bearing Set
- Full Gasket Set
- Camshaft
- Valve Lifters
- Timing Set
- Oil Pump
- Expansion Plug Kit
This kit is available in multiple size configurations to match your engine machining specifications.
Available Sizes & Options
Pistons & Ring Sizes (Oversize)
- Standard (STD)
- .020 Oversize
- .030 Oversize
- .040 Oversize
- .060 Oversize
Rod Bearing Sizes (Undersize)
- Standard (STD)
- .010 Undersize
- .020 Undersize
- .030 Undersize
Main Bearing Sizes (Undersize)
- Standard (STD)
- .010 Undersize
- .020 Undersize
- .030 Undersize
Need machining services to match these specifications? Visit our engine machine shop services for boring, resurfacing, and balancing.
Engine Fitment & Notes
Proper fitment and engine configuration are important for achieving the best performance and long-term reliability.
- Engine: AMC / Jeep 4.2L / 258 Inline 6
- Configuration: Inline 6-cylinder
- Years: 1971–1990
- Application: Truck / SUV
- Common Vehicles: CJ, Wrangler, Cherokee, Wagoneer
Note: Engine configurations may vary by year and application. Verify engine specifications before ordering.
Why Choose This AMC Jeep 258 Master Rebuild Kit?
This kit is designed to provide a dependable and complete solution for rebuilding one of Jeep’s most proven inline 6 engines.
- ✔ Complete master kit solution
- ✔ Designed for AMC / Jeep 4.2L engines
- ✔ Strong low-end torque performance
- ✔ Precision-fit components
Not sure which sizes you need? Review our engine rebuild kit guide or learn more about proper measurements in our bearing clearance guide.
Need help selecting sizes or confirming fitment? Contact Benning Auto Parts at 1-800-847-0733 for expert assistance.
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Additional information
| Weight | 39.15 lbs |
|---|---|
| Dimensions | 26 × 15 × 12 in |
