Enginetech BC341J.030 is a 0.030 undersize main bearing set for 1968-1998 Ford, Lincoln, Mercury 6.1L-7.5L 370-460ci V8 engines.
Important Notes:
- Sized for crankshaft main journals machined .030 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 | BC341J.030 |
| Bearing Size | 0.030 Undersize |
| Quantity Per Set | 5 main bearings per set |
| Engine | 6.1L-7.5L 370-460ci V8 |
| Year Range | 1968-1998 |
| Makes | Ford, Lincoln, Mercury |
| Country of Origin | IL |
| Weight | 1.75 lbs |
| UPC | 707473000000 |
| OEM Cross-Refs | ACL:5M1039P, Clevite:MS-1039P, FEL-PRO:4907M, King Engine Bearings:MB5650SI, MAHLE:MS-1039P |
Complete main bearing set covering all main journals for the V8 application - one set required per engine.
Fitment:
- 1968-1968 Lincoln Continental 7.0L 429ci V8
- 1968-1971 Lincoln Mark III 7.5L 460ci V8
- 1968-1973 Ford Thunderbird 7.0L 429ci V8
- 1968-1978 Lincoln Continental 7.5L 460ci V8
- 1969-1969 Ford LTD 7.0L 429ci V8
- 1971-1973 Ford LTD 7.0L 429ci V8
- 1969-1970 Mercury Marauder 7.0L 429ci V8
- 1969-1971 Ford Mustang 7.0L 429ci V8
- 1969-1971 Mercury Colony Park 7.0L 429ci V8
- 1969-1971 Mercury Cougar 7.0L 429ci V8
- 1969-1971 Mercury Cyclone 7.0L 429ci V8
- 1969-1971 Mercury Marquis 7.0L 429ci V8
- 1969-1971 Mercury Monterey 7.0L 429ci V8
- 1969-1972 Ford Custom 7.0L 429ci V8
- 1969-1973 Ford Country Sedan 7.0L 429ci V8
- 1969-1973 Ford Country Squire 7.0L 429ci V8
- 1969-1973 Ford Custom 500 7.0L 429ci V8
- 1969-1973 Ford Galaxie 500 7.0L 429ci V8
- 1969-1973 Ford Ranch Wagon 7.0L 429ci V8
- 1969-1973 Mercury Colony Park 7.0L 429ci V8
- 1969-1973 Mercury Marquis 7.0L 429ci V8
- 1969-1973 Mercury Monterey 7.0L 429ci V8
- 1970-1970 Ford Fairlane 7.0L 429ci V8
- 1970-1970 Ford Falcon 7.0L 429ci V8
- 1970-1973 Ford Ranchero 7.0L 429ci V8
- 1970-1973 Ford Torino 7.0L 429ci V8
- 1970-1973 Mercury Montego 7.0L 429ci V8
- 1971-1972 Mercury Colony Park 7.0L 429ci V8
- 1971-1972 Mercury Marquis 7.0L 429ci V8
- 1971-1972 Mercury Monterey 7.0L 429ci 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.
