Enginetech BB284J030 is a .030 undersize connecting rod bearing set for 1955-1967 Chevy, GMC, Pontiac 4.3L-5.3L 265-327ci V8 engines.
Important Notes:
- Sized for crankshaft rod journals machined .030 inch undersize. Measure journal diameter before installation - installing on the wrong journal size will cause immediate clearance failure.
- Always replace rod bearings as a complete set. Never mix new bearings with used bearings - uneven wear and clearance differences will cause premature failure.
| Part Number | BB284J030 |
| Bearing Size | .030 Undersize |
| Quantity Per Set | 8 pairs (16 bearings) per set |
| Engine | 4.3L-5.3L 265-327ci V8 |
| Year Range | 1955-1967 |
| Makes | Chevrolet, GMC, Pontiac |
| Country of Origin | IL |
| Weight | 1.0 lbs |
| UPC | 707473038058 |
| OEM Cross-Refs | ACL:8B745P, FEL-PRO:8-2020CP, King Engine Bearings:CR803AM, MAHLE:CB-745AL-8 |
Complete set covers all 8 connecting rod journals for the V8 application - one set required per engine.
Fitment:
- 1955-1956 Chevrolet Corvette 4.3L 265ci V8
- 1955-1957 Chevrolet Bel Air 4.3L 265ci V8
- 1955-1957 Chevrolet One-Fifty Series 4.3L 265ci V8
- 1955-1957 Chevrolet Sedan Delivery 4.3L 265ci V8
- 1955-1957 Chevrolet Truck 4.3L 265ci V8
- 1955-1957 Chevrolet Two-Ten Series 4.3L 265ci V8
- 1957-1957 Chevrolet Del Ray 4.3L 265ci V8
- 1957-1957 Chevrolet One-Fifty Series 4.6L 283ci V8
- 1957-1957 Chevrolet Two-Ten Series 4.6L 283ci V8
- 1957-1958 Chevrolet Del Ray 4.6L 283ci V8
- 1957-1958 Chevrolet Sedan Delivery 4.6L 283ci V8
- 1957-1958 Chevrolet Truck 4.6L 283ci V8
- 1957-1961 Chevrolet Corvette 4.6L 283ci V8
- 1957-1967 Chevrolet Bel Air 4.6L 283ci V8
- 1957-1967 Pontiac Laurentian 4.6L 283ci V8
- 1958-1958 Chevrolet Yeoman 4.6L 283ci V8
- 1958-1967 Chevrolet Biscayne 4.6L 283ci V8
- 1958-1967 Chevrolet Impala 4.6L 283ci V8
- 1959-1959 Chevrolet 3B 4.6L 283ci V8
- 1959-1959 Chevrolet 3C 4.6L 283ci V8
- 1959-1959 Chevrolet 3D 4.6L 283ci V8
- 1959-1959 Chevrolet 3E 4.6L 283ci V8
- 1959-1959 Chevrolet 3F 4.6L 283ci V8
- 1959-1959 Chevrolet 3G 4.6L 283ci V8
- 1959-1960 Chevrolet El Camino 4.6L 283ci V8
- 1959-1961 Chevrolet Brookwood 4.6L 283ci V8
- 1959-1961 Chevrolet Kingswood 4.6L 283ci V8
- 1959-1961 Chevrolet Parkwood 4.6L 283ci V8
- 1960-1960 GMC Truck 4.6L 283ci V8
- 1960-1962 Chevrolet C40 4.6L 283ci V8
- ...and 56 additional applications
Enginetech rod 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 connecting rod journal geometry and operating loads of the engine family it serves. Rod bearings are a wear component and must be selected to match the crankshaft 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 rod bearings as a complete set. Mixing new bearings with used bearings produces uneven oil clearance across cylinders 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.
