Sealed Power 4664M Engine Crankshaft Main Bearing Set

Sealed Power 4664M Main Bearing Set for Buick V8

Sealed Power 4664M is an OE replacement engine crankshaft main bearing set for Buick 455 V8 rebuilds. It is built for vintage applications over 35 years old, with overplated copper-lead alloy construction for dependable bearing support in classic engine restoration work.

Key Features

• OE replacement engine crankshaft main bearing set
• Fits Buick 455 V8 applications
• Overplated copper-lead alloy bearing material
• Standard size options: Std, .010, .020, .030
• Made for vintage Buick engine rebuilds
• Sealed Power part number 4664M

Detailed Description

Sealed Power 4664M is a main bearing set for Buick V8 engines with 455 cubic inch displacement. It is intended for classic Buick engine rebuilds where correct crankshaft support, proper oil clearance, and durable bearing material matter. The overplated copper-lead alloy construction supports long-term service in restored engines, while the standard size range helps match common crankshaft journal requirements during machining and rebuild work. This part number 4664M is a practical choice for Buick LeSabre, Riviera, Century, Regal, and Skylark applications listed below.

This part cross-references 1664K and MS908P for the same application.

Vehicle Fitment

• Fits 1970-1976 Buick LeSabre, N/A
• Fits 1967-1976 Buick Riviera, N/A
• Fits 1973-1974 Buick Century, N/A
• Fits 1973-1974 Buick Regal, N/A
• Fits 1970-1971 Buick Skylark, N/A
• Fits 1967-1968 Buick Skylark, N/A

What It Helps Address

• Crankshaft bearing wear during Buick 455 engine rebuilds
• Excessive bearing clearance from aged original components
• Oil pressure loss related to worn main bearings
• Noise or knock caused by deteriorated crankshaft support surfaces
• Restoration needs for vintage Buick V8 engines

Installation Notes and Tips

Verify crankshaft journal size before installation and match the bearing size to the machined crankshaft dimensions. Clean all bearing saddles, check oil clearance during assembly, and confirm proper lubrication before initial startup. For best results, follow factory service specifications for the Buick 455 V8 during engine rebuild procedures.

Quality Assurance

Sealed Power Vintage components are manufactured for older applications using controlled production standards, including ISO and QS certified processes, to support consistent fit and long service life in classic engine rebuilds.