Enginetech BC383JSTD is a standard size main bearing set for 1959-1979 Buick, Pontiac 5.3L-6.6L 326-400ci V8 engines.
Important Notes:
- Standard size - for standard (unmachined) crankshaft main journals only. Measure journal diameter before installation to confirm fit.
- 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 | BC383JSTD |
| Bearing Size | Standard |
| Quantity Per Set | 5 main bearings per set |
| Engine | 5.3L-6.6L 326-400ci V8 |
| Year Range | 1959-1979 |
| Makes | Buick, Pontiac |
| Country of Origin | IL |
| Weight | 1.5 lbs |
| UPC | 707473000000 |
| OEM Cross-Refs | ACL:5M496P, Clevite:MS-496P, FEL-PRO:4084M, King Engine Bearings:MB5523AM, MAHLE:MS-496P |
Complete main bearing set covering all main journals for the V8 application - one set required per engine.
Fitment:
- 1959-1966 Pontiac Bonneville 6.4L 389ci V8
- 1959-1966 Pontiac Catalina 6.4L 389ci V8
- 1959-1966 Pontiac Star Chief 6.4L 389ci V8
- 1960-1960 Pontiac Ventura 6.4L 389ci V8
- 1960-1961 Pontiac Ventura 6.4L 389ci V8
- 1961-1961 Pontiac Tempest 6.4L 389ci V8
- 1961-1961 Pontiac Ventura 6.4L 389ci V8
- 1962-1962 Pontiac Grand Prix 6.4L 389ci V8
- 1962-1963 Pontiac Grand Prix 6.4L 389ci V8
- 1962-1964 Pontiac Grand Prix 6.4L 389ci V8
- 1963-1967 Pontiac LeMans 5.3L 326ci V8
- 1963-1967 Pontiac Tempest 5.3L 326ci V8
- 1964-1964 Pontiac GTO 6.4L 389ci V8
- 1964-1964 Pontiac Grand Prix 6.4L 389ci V8
- 1965-1965 Pontiac GTO 6.4L 389ci V8
- 1965-1966 Pontiac GTO 6.4L 389ci V8
- 1965-1966 Pontiac Grand Prix 6.4L 389ci V8
- 1966-1966 Pontiac GTO 6.4L 389ci V8
- 1967-1967 Pontiac Catalina 6.6L 400ci V8
- 1967-1967 Pontiac Executive 6.6L 400ci V8
- 1967-1967 Pontiac Firebird 5.3L 326ci V8
- 1967-1967 Pontiac Firebird 6.6L 400ci V8
- 1967-1967 Pontiac GTO 6.6L 400ci V8
- 1967-1967 Pontiac Grand Prix 6.6L 400ci V8
- 1967-1969 Pontiac Catalina 6.6L 400ci V8
- 1967-1969 Pontiac Executive 6.6L 400ci V8
- 1967-1969 Pontiac Firebird 6.6L 400ci V8
- 1967-1969 Pontiac GTO 6.6L 400ci V8
- 1967-1969 Pontiac Grand Prix 6.6L 400ci V8
- 1968-1968 Pontiac Firebird 5.7L 350ci V8
- ...and 94 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.
