Sealed Power 4020A Engine Connecting Rod Bearing

Sealed Power 4020A Engine Connecting Rod Bearing

Sealed Power 4020A is a standard size engine connecting rod bearing for A-Series aluminum engine applications. Built to support precise oil clearance and consistent shaft fit, it is a direct replacement choice for rebuilds and repairs on a wide range of Chevrolet, Pontiac, Buick, Oldsmobile, and related vehicles.

Key Features

• Standard size connecting rod bearing for A-Series aluminum engines
• Engineered housing bore range: 2.1245-2.1255 in. (53.9620-53.9880 mm)
• Oil clearance range: 0.0009-0.0040 in. (0.0230-0.1020 mm)
• Standard shaft range: 1.9984-1.9993 in. (50.7590-50.7820 mm)
• Overall length: 0.7200 in. (18.2900 mm)
• Wall thickness up to 0.0621 in. (1.5770 mm)
• Manufactured using ISO- and QS-certified processes

Detailed Description

The Sealed Power 4020A connecting rod bearing is built for standard size service in A-Series aluminum engines, with dimensions that support proper bearing fit and oil film control during engine operation. The listed housing bore, shaft diameter, and oil clearance specifications help match the bearing to the required engine tolerances during a rebuild. This part number is commonly referenced for applications such as Chevrolet Impala, Pontiac Grand Prix, Buick Regal, and Oldsmobile Cutlass Ciera engine service.

Sealed Power uses modern materials and controlled manufacturing methods to produce engine bearings that meet the demands of current and legacy engine platforms. This part cross-references ACDelco 12480255 and 12480266 for the same application.

Vehicle Fitment

• Fits 2005-2009 Chevrolet Equinox, N/A
• Fits 2006-2009 Pontiac Torrent, N/A
• Fits 1994-2005 Buick Century, N/A
• Fits 1982-1989 Buick Century, N/A
• Fits 2002-2005 Buick Rendezvous, N/A
• Fits 2000-2005 Chevrolet Impala, N/A
• Fits 1995-2005 Chevrolet Monte Carlo, N/A
• Fits 2001-2005 Pontiac Aztek, N/A
• Fits 1994-2005 Pontiac Grand Am, N/A
• Fits 1999-2005 Pontiac Montana, N/A
• Fits 1999-2004 Oldsmobile Alero, N/A
• Fits 1996-2004 Oldsmobile Silhouette, N/A
• Fits 1990-1994 Oldsmobile Silhouette, N/A
• Fits 1997-2003 Chevrolet Malibu, N/A
• Fits 1988-2003 Pontiac Grand Prix, N/A
• Fits 1990-2001 Chevrolet Lumina, N/A
• Fits 1997-1999 Oldsmobile Cutlass, N/A
• Fits 1990-1999 Pontiac Trans Sport, N/A
• Fits 1994-1998 Buick Skylark, N/A
• Fits 1980-1985 Buick Skylark, N/A
• Fits 1994-1998 Oldsmobile Achieva, N/A
• Fits 1988-1997 Oldsmobile Cutlass Supreme, N/A
• Fits 1988-1996 Buick Regal, N/A
• Fits 1987-1996 Chevrolet Corsica, N/A
• Fits 1990-1996 Chevrolet Lumina APV, N/A
• Fits 1994-1996 Oldsmobile Cutlass Ciera, N/A
• Fits 1982-1989 Oldsmobile Cutlass Ciera, N/A
• Fits 1982-1995 Chevrolet Camaro, N/A
• Fits 1982-1995 Pontiac Firebird, N/A
• Fits 1985-1994 Chevrolet Cavalier, N/A
• Fits 1991-1994 Isuzu Pickup, N/A
• Fits 1994 Oldsmobile Cutlass Cruiser, N/A
• Fits 1987-1989 Oldsmobile Cutlass Cruiser, N/A
• Fits 1991-1994 Pontiac Sunbird, N/A
• Fits 1982-1993 Chevrolet S10, N/A
• Fits 1991-1993 GMC Sonoma, N/A
• Fits 1991-1992 Isuzu Rodeo, N/A
• Fits 1989-1991 Isuzu Trooper, N/A
• Fits 1982-1991 Pontiac 6000, N/A
• Fits 1987-1991 Pontiac Tempest, N/A
• Fits 1982-1990 Chevrolet Celebrity, N/A
• Fits 1982-1990 GMC S15, N/A
• Fits 1983-1989 Chevrolet S10 Blazer, N/A
• Fits 1983-1989 GMC S15 Jimmy, N/A
• Fits 1985-1988 Cadillac Cimarron, N/A
• Fits 1985-1988 Pontiac Fiero, N/A
• Fits 1985-1987 Oldsmobile Firenza, N/A
• Fits 1984-1986 Jeep Cherokee, N/A
• Fits 1986 Jeep Comanche, N/A
• Fits 1984-1986 Jeep Wagoneer, N/A
• Fits 1984-1985 Chevrolet Citation II, N/A
• Fits 1980-1984 Oldsmobile Omega, N/A
• Fits 1980-1984 Pontiac Phoenix, N/A
• Fits 1980-1983 Chevrolet Citation, N/A

Common Repair Uses

• Restoring proper rod bearing clearance during engine rebuilds
• Replacing worn bearings that can contribute to low oil pressure concerns
• Addressing bearing noise caused by excessive wear or scoring
• Correcting fitment issues in standard size A-Series aluminum engine service
• Supporting dependable crankshaft-to-rod interface performance

Installation Notes and Tips

Verify crankshaft journal size, housing bore, and oil clearance before installation. Clean all mating surfaces thoroughly, follow the engine builder’s torque specifications, and confirm bearing orientation during assembly. Because this is a standard size bearing, it should be matched to the engine’s measured dimensions rather than assumed from model year alone. For search relevance, this part is frequently selected for Chevrolet Impala, Pontiac Grand Prix, and Buick Regal rebuilds.

Quality Assurance

Sealed Power states that its parts use advanced designs, modern materials, and ISO- and QS-certified manufacturing to meet the demands of today’s engines. The 4020A reflects that manufacturing approach for engine bearing service in a broad range of GM and related applications.