Enginetech BC329J.010 is a 0.010 undersize main bearing set for 1966-1991 Jeep, American 4.7L-6.6L 290-401ci V8 engines.
Important Notes:
- Sized for crankshaft main journals machined .010 inch undersize. Measure journal diameter before installation - installing on the wrong journal size will cause immediate clearance failure.
- Always replace main bearings as a complete set. Never mix new bearings with used bearings - uneven wear and clearance differences will cause premature failure.
| Part Number | BC329J.010 |
| Bearing Size | 0.010 Undersize |
| Quantity Per Set | 5 main bearings per set |
| Engine | 4.7L-6.6L 290-401ci V8 |
| Year Range | 1966-1991 |
| Makes | American, Jeep |
| Country of Origin | IL |
| Weight | 1.5 lbs |
| UPC | 707473000000 |
| OEM Cross-Refs | ACL:5M1041P, ACL:5M1482P, Clevite:MS-1041P, King Engine Bearings:MB5518AM, MAHLE:MS-1041P |
Complete main bearing set covering all main journals for the V8 application - one set required per engine.
Fitment:
- 1966-1966 American Motors Classic 4.7L 290ci V8
- 1966-1966 American Motors Rogue 4.7L 290ci V8
- 1966-1967 American Motors American 4.7L 290ci V8
- 1967-1967 American Motors Ambassador 4.7L 290ci V8
- 1967-1967 American Motors Marlin 4.7L 290ci V8
- 1967-1967 American Motors Marlin 5.6L 343ci V8
- 1967-1967 American Motors Rebel 5.6L 343ci V8
- 1967-1968 American Motors American 4.7L 290ci V8
- 1967-1968 American Motors American 5.6L 343ci V8
- 1967-1968 American Motors Rebel 4.7L 290ci V8
- 1967-1968 American Motors Rebel 5.6L 343ci V8
- 1967-1969 American Motors Ambassador 4.7L 290ci V8
- 1967-1969 American Motors Ambassador 5.6L 343ci V8
- 1968-1968 American Motors American 4.7L 290ci V8
- 1968-1968 American Motors Rebel 4.7L 290ci V8
- 1968-1968 American Motors Rebel 5.6L 343ci V8
- 1968-1968 American Motors Rebel 6.4L 390ci V8
- 1970-1970 American Motors Rebel 6.4L 390ci V8
- 1968-1969 American Motors AMX 4.7L 290ci V8
- 1968-1969 American Motors AMX 5.6L 343ci V8
- 1968-1969 American Motors Ambassador 4.7L 290ci V8
- 1968-1969 American Motors Javelin 4.7L 290ci V8
- 1968-1969 American Motors Javelin 5.6L 343ci V8
- 1968-1970 American Motors AMX 6.4L 390ci V8
- 1968-1970 American Motors Ambassador 6.4L 390ci V8
- 1968-1970 American Motors Javelin 6.4L 390ci V8
- 1969-1969 American Motors AMX 4.7L 290ci V8
- 1969-1969 American Motors Rambler 4.7L 290ci V8
- 1969-1969 American Motors Rambler 5.6L 343ci V8
- 1969-1969 American Motors Rambler 6.4L 390ci V8
- ...and 53 additional applications
Enginetech main bearings are engineered to OEM specifications, drawing on over 40 years of engine rebuilding expertise to deliver the precise clearance, crush, and eccentricity required for long-term durability under both stock and moderate-performance loads. Each set is application-specific: materials, wall thickness, oil clearance, and surface finish are all matched to the crankshaft main journal geometry and operating loads of the engine family it serves. Main bearings are a wear component and must be selected to match the crankshaft main journal size - bearings sized for standard journals will not seat correctly on undersize-machined journals and vice versa, so verify your journal measurement with a precision micrometer before ordering or installing. Always replace main bearings as a complete set. Mixing new bearings with used bearings produces uneven oil clearance across the crankshaft and accelerates wear on the freshly installed bearings - the small cost of a complete set is insurance against premature failure on the bearings you just paid to install. Enginetech documents every set with clear application-specific notes, journal-size designation, and cross-references so the right part lands on the bench the first time.
WARNING: This product can expose you to chemicals including lead and nickel, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
