Crown Automotive
Expansion Plug for Select 70-96 Jeep Models w/ 4.0L, 5.0L, or 5.9L Engines Crown Automotive
SKU: C01X J3178449
Description
Part #: J3178449
Expansion Plug for Jeep 71-81 CJ-5, CJ-6, CJ-7, CJ-8, 1987-1992 MJ Comanche, 1970-1991 SJ Grand Wagoneer, Cherokee, Wagoneer, J-Series, 1972-1973 C104 Commando w/ 4.0L, 5.0L, or 5.9L EnginesFeatures and Benefits:1 inch Diameter12-Month WarrantyDirect ReplacementFits Multiple EnginesUse Existing HardwareDetails:Material: MetalFinish: UnpaintedHardware Included: Use Existing HardwareApplication: 1970-1971 Jeep J-Series J-3500 w/ 5.9L (V8-360) Engine None; 1970-1971 Jeep J-Series J-3600 w/ 5.9L (V8-360) Engine None; 1970-1971 Jeep J-Series J-3700 w/ 5.9L (V8-360) Engine None; 1970-1971 Jeep J-Series J-3800 w/ 5.9L (V8-360) Engine None; 1970-1973 Jeep J-Series J-100 w/ 5.9L (V8-360) Engine None; 1970-1973 Jeep J-Series J-2600 w/ 5.9L (V8-360) Engine None; 1970-1973 Jeep J-Series J-2700 w/ 5.9L (V8-360) Engine None; 1970-1973 Jeep J-Series J-2800 w/ 5.9L (V8-360) Engine None; 1970-1973 Jeep J-Series J-4500 w/ 5.9L (V8-360) Engine None; 1970-1973 Jeep J-Series J-4600 w/ 5.9L (V8-360) Engine None; 1970-1973 Jeep J-Series J-4700 w/ 5.9L (V8-360) Engine None; 1970-1973 Jeep J-Series J-4800 w/ 5.9L (V8-360) Engine None; 1970-1983 Jeep SJ Wagoneer w/ 5.9L (V8-360) Engine None; 1971-1975 Jeep CJ-6 w/ 5.0L (V8-304) Engine None; 1971-1981 Jeep CJ-5 w/ 5.0L (V8-304) Engine None; 1972-1973 Jeep C104 Commando w/ 5.0L (V8-304) Engine None; 1974-1983 Jeep SJ Cherokee w/ 5.9L (V8-360) Engine None; 1974-1987 Jeep J-Series J-10 w/ 5.9L (V8-360) Engine None; 1974-1987 Jeep J-Series J-20 w/ 5.9L (V8-360) Engine None; 1976-1981 Jeep CJ-7 w/ 5.0L (V8-304) Engine None; 1984-1991 Jeep SJ Grand Wagoneer w/ 5.9L (V8-360) Engine None; 1987-1992 Jeep MJ Comanche w/ 4.0L Engine None; 1987-1996 Jeep XJ Cherokee w/ 4.0L Engine None; 1991-1995 Jeep YJ Wrangler w/ 4.0L Engine None; 1993-1996 Jeep ZJ Grand Cherokee w/ 4.0L Engine NoneCrown Automotive carries over 9600 unique quality replacement parts encompassing over 766,000 different applications for every model of Jeep produced since 1941.
Features:
- 1" Diameter
- Fits Multiple Engines
- Use Existing Hardware
- Direct Replacement
- 12-Month Warranty
Expansion Plug for Jeep 71-81 CJ-5, CJ-6, CJ-7, CJ-8, 1987-1992 MJ Comanche, 1970-1991 SJ Grand Wagoneer, Cherokee, Wagoneer, J-Series, 1972-1973 C104 Commando w/ 4.0L, 5.0L, or 5.9L Engines
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Crown Automotive |
| Part Number | C01X J3178449 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy