Enginetech BC297J.040 is a 0.040 undersize main bearing set for 1962-1993 Chevy, GMC, Jeep, Buick 2.5L 151-153ci I4 engines.
Important Notes:
- Sized for crankshaft main journals machined .040 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 | BC297J.040 |
| Bearing Size | 0.040 Undersize |
| Quantity Per Set | 5 main bearings per set |
| Engine | 2.5L 151-153ci I4 |
| Year Range | 1962-1993 |
| Makes | American, Buick, Chevrolet, GMC, Jeep, Pontiac |
| Country of Origin | IL |
| Weight | 1.0 lbs |
| UPC | 707473000000 |
| OEM Cross-Refs | ACL:5M1733P, Clevite:MS-1733A, FEL-PRO:4123M, FEL-PRO:6689M, King Engine Bearings:MB5532AM |
Complete main bearing set covering all main journals for the I4 application - one set required per engine.
Fitment:
- 1962-1968 Chevrolet Chevy II 2.5L 153ci I4
- 1963-1965 GMC G1000 Series 2.5L 153ci I4
- 1963-1965 GMC Suburban 2.5L 153ci I4
- 1969-1970 Chevrolet Nova 2.5L 153ci I4
- 1977-1977 Pontiac Astre 2.5L 151ci I4
- 1977-1977 Pontiac Ventura 2.5L 151ci I4
- 1977-1978 Pontiac Phoenix 2.5L 151ci I4
- 1977-1980 Pontiac Sunbird 2.5L 151ci I4
- 1978-1979 Chevrolet Monza 2.5L 151ci I4
- 1978-1979 Pontiac Sunbird 2.5L 151ci I4
- 1978-1980 Chevrolet Monza 2.5L 151ci I4
- 1979-1979 Chevrolet Monza 2.5L 151ci I4
- 1979-1979 Pontiac Sunbird 2.5L 151ci I4
- 1980-1981 Buick Skylark 2.5L 151ci I4
- 1980-1981 Chevrolet Citation 2.5L 151ci I4
- 1980-1982 American Motors Concord 2.5L 151ci I4
- 1980-1982 American Motors Spirit 2.5L 151ci I4
- 1980-1982 Pontiac Phoenix 2.5L 151ci I4
- 1980-1983 Jeep CJ5 2.5L 151ci I4
- 1980-1983 Jeep CJ7 2.5L 151ci I4
- 1980-1983 Jeep DJ5 2.5L 151ci I4
- 1981-1983 American Motors Eagle 2.5L 151ci I4
- 1981-1983 Jeep Scrambler 2.5L 151ci I4
- 1982-1982 Buick Century 2.5L 151ci I4
- 1982-1983 Chevrolet Citation 2.5L 151ci I4
- 1982-1984 Pontiac Phoenix 2.5L 151ci I4
- 1982-1985 Buick Skylark 2.5L 151ci I4
- 1982-1986 Pontiac Firebird 2.5L 151ci I4
- 1982-1990 Chevrolet Celebrity 2.5L 151ci I4
- 1982-1991 Pontiac 6000 2.5L 151ci I4
- ...and 19 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.
