Sealed Power 1555CPA Engine Connecting Rod Bearing

Sealed Power 1555CPA Connecting Rod Bearing

Sealed Power 1555CPA is a standard-size engine connecting rod bearing for vintage rebuilds that demand accurate clearances and dependable wear control. It is built for classic Pontiac applications and other listed vehicles where original-style engine service parts are needed.

Key Features

• Standard size engine connecting rod bearing for vintage engine rebuilds
• Housing bore range: 2.3745-2.3750 in. (60.3120-60.3250 mm)
• Standard shaft range: 2.2488-2.2498 in. (57.1200-57.1450 mm)
• Oil clearance range: 0.0009-0.0034 in. (0.0230-0.0860 mm)
• Overall length: 0.8860 in. max (22.5000 mm)
• Wall thickness: 0.0619 in. max (1.5720 mm)
• Engine bearing set application for classic Pontiac, Buick, and Oldsmobile models
• Sealed Power vintage component line for vehicles over 35 years old

Detailed Description

Sealed Power 1555CPA is a vintage engine connecting rod bearing engineered for restoration work on older engines that require standard-size service parts. The bearing dimensions are specified for controlled housing bore, shaft diameter, oil clearance, and wall thickness, helping support proper crankshaft fitment during a rebuild. This part is listed for classic Pontiac Firebird, Bonneville, Catalina, Grand Prix, LeMans, Grand Am, GTO, Tempest, Laurentian, and Parisienne applications, along with select Buick and Oldsmobile models.

Sealed Power’s vintage component line is aimed at applications over 35 years old and uses modern materials with ISO- and QS-certified manufacturing practices. This makes the 1555CPA a practical choice for engine builders restoring Pontiac GTO and Pontiac LeMans engines, as well as other period-correct V8 rebuilds that need a standard-size connecting rod bearing.

This part cross-references 3650B and 3966CP for the same application.

What It Helps Address

• Rod bearing wear found during engine teardown
• Loss of proper oil clearance in a rebuilt classic engine
• Crankshaft-to-rod fitment issues on standard-size journals
• Noise or knock related to worn connecting rod bearings
• Restoration needs for vintage Pontiac, Buick, and Oldsmobile engines

Installation Notes and Tips

Verify crankshaft journal size, housing bore, and oil clearance before assembly. Measure the connecting rod and crankshaft carefully and confirm that the engine calls for standard-size bearings before installation. Clean all oil passages, use proper assembly lubricant, and follow the engine builder’s torque and clearance specifications during final assembly.

Compatible With 1967-1979 Pontiac Firebird, N/A; 1959-1978 Pontiac Bonneville, N/A; 1959-1978 Pontiac Catalina, N/A; 1975-1977 Pontiac Grand LeMans, N/A; 1962-1977 Pontiac Grand Prix, N/A; 1976-1977 Pontiac Laurentian, N/A; 1967-1974 Pontiac Laurentian, N/A; 1963-1977 Pontiac LeMans, N/A; 1976-1977 Pontiac Parisienne, N/A; 1967-1974 Pontiac Parisienne, N/A; 1975 Buick LeSabre, N/A; 1975 Oldsmobile 98, N/A; 1975 Oldsmobile Custom Cruiser, N/A; 1975 Oldsmobile Delta 88, N/A; 1973-1975 Pontiac Grand Am, N/A; 1964-1973 Pontiac GTO, N/A; 1961-1970 Pontiac Tempest, N/A.

Quality Assurance

Sealed Power vintage components are manufactured with ISO- and QS-certified processes and are intended for long-term service in classic engine rebuilds. The brand’s vintage line is positioned for older applications where consistent dimensions and material quality matter during restoration.