Enginetech BC485J.030 is a 0.030 undersize main bearing set for 1990-2011 Ford, Mercury, Mazda 2.9L/4.0L 177-245ci V6 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 | BC485J.030 |
| Bearing Size | 0.030 Undersize |
| Quantity Per Set | 4 main bearings per set |
| Engine | 2.9L/4.0L 177-245ci V6 |
| Year Range | 1990-2011 |
| Makes | Ford, Mazda, Mercury |
| Country of Origin | IL |
| Weight | 0.75 lbs |
| UPC | 707473000000 |
| OEM Cross-Refs | ACL:4M2006P, Clevite:MS-2006A, FEL-PRO:7245M, King Engine Bearings:MB4023AM, MAHLE:MS-2006P |
Complete main bearing set covering all main journals for the V6 application - one set required per engine.
Fitment:
- 1990-1990 Ford Bronco II 2.9L 177ci V6
- 1990-1992 Ford Ranger 2.9L 177ci V6
- 1990-1997 Ford Aerostar 4.0L 245ci V6
- 1990-2000 Ford Ranger 4.0L 245ci V6
- 1991-1994 Mazda Navajo 4.0L 245ci V6
- 1991-2000 Ford Explorer 4.0L 245ci V6
- 1994-2000 Mazda B4000 4.0L 245ci V6
- 1997-2010 Ford Explorer 4.0L 245ci V6
- 1998-2002 Mercury Mountaineer 4.0L 245ci V6
- 2004-2010 Mercury Mountaineer 4.0L 245ci V6
- 2001-2003 Ford Explorer Sport 4.0L 245ci V6
- 2001-2005 Ford Explorer Sport Trac 4.0L 245ci V6
- 2008-2010 Ford Explorer Sport Trac 4.0L 245ci V6
- 2001-2009 Mazda B4000 4.0L 245ci V6
- 2001-2011 Ford Ranger 4.0L 245ci V6
- 2002-2005 Ford Explorer 4.0L 245ci V6
- 2002-2005 Mercury Mountaineer 4.0L 245ci V6
- 2004-2005 Ford Explorer Sport Trac 4.0L 245ci V6
- 2007-2008 Ford Explorer Sport Trac 4.0L 245ci V6
- 2010-2010 Ford Explorer Sport Trac 4.0L 245ci V6
- 2005-2010 Ford Mustang 4.0L 245ci V6
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.
