Enginetech BC306J.040 is a 0.040 undersize main bearing set for 1975-1997 Ford, Lincoln, Mercury 5.8L/6.6L 351-400ci V8 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 | BC306J.040 |
| Bearing Size | 0.040 Undersize |
| Quantity Per Set | 5 main bearings per set |
| Engine | 5.8L/6.6L 351-400ci V8 |
| Year Range | 1975-1997 |
| Makes | Ford, Lincoln, Mercury |
| Country of Origin | AU |
| Weight | 1.5 lbs |
| UPC | 707473000000 |
| OEM Cross-Refs | ACL:5M1432P, Clevite:MS-1432A, Clevite:MS-1432P, FEL-PRO:5078M, King Engine Bearings:MB5505SI |
Complete main bearing set covering all main journals for the V8 application - one set required per engine.
Fitment:
- 1975-1979 Ford Ranchero 5.8L 351ci V8
- 1977-1977 Ford Custom 500 5.8L 351ci V8
- 1977-1977 Ford Custom 500 6.6L 400ci V8
- 1977-1977 Ford Granada 5.8L 351ci V8
- 1977-1977 Ford P-500 6.6L 400ci V8
- 1977-1977 Lincoln Versailles 5.8L 351ci V8
- 1977-1977 Ford F-150 XLT 5.8L 351ci V8
- 1983-1984 Ford F-150 XLT 5.8L 351ci V8
- 1977-1978 Ford LTD 6.6L 400ci V8
- 1977-1978 Ford LTD II 6.6L 400ci V8
- 1977-1978 Ford Ranchero 6.6L 400ci V8
- 1977-1978 Ford Thunderbird 6.6L 400ci V8
- 1977-1978 Mercury Cougar 6.6L 400ci V8
- 1977-1978 Mercury Grand Marquis 6.6L 400ci V8
- 1977-1978 Mercury Marquis 6.6L 400ci V8
- 1977-1979 Ford E-100 Econoline 5.8L 351ci V8
- 1977-1979 Ford E-100 Econoline Club Wagon 5.8L 351ci V8
- 1977-1979 Ford F-100 5.8L 351ci V8
- 1977-1979 Ford F-100 6.6L 400ci V8
- 1977-1979 Ford F-150 5.8L 351ci V8
- 1977-1979 Ford F-150 6.6L 400ci V8
- 1977-1979 Ford F-250 5.8L 351ci V8
- 1977-1979 Ford F-250 6.6L 400ci V8
- 1977-1979 Ford F-350 5.8L 351ci V8
- 1977-1979 Ford F-350 6.6L 400ci V8
- 1977-1979 Ford LTD 5.8L 351ci V8
- 1977-1979 Ford LTD II 5.8L 351ci V8
- 1977-1979 Ford Ranchero 5.8L 351ci V8
- 1977-1979 Ford Thunderbird 5.8L 351ci V8
- 1977-1979 Lincoln Continental 6.6L 400ci V8
- ...and 52 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.
