What is the main benefit of tri-metal bearing construction?

Tri-metal bearings, like these from Clevite, offer a strong combination of materials. The steel backing provides structural support, while the lead-tin-copper alloy layer offers excellent conformability and embeddability, helping to manage loads and maintain oil film.

Do these bearings come with a specific size or are they standard fit?

This is the MS805P20 set, which is a standard size bearing set. If your crankshaft has been machined undersize due to wear or damage, you would need a different size bearing set.

What else might I need when installing main bearings?

When installing main bearings, it's essential to have a clean engine block and crankshaft. You'll also need assembly lube to coat the bearings and crankshaft journals before installation, and a torque wrench to tighten the main caps to the manufacturer's specifications.

Clevite Main Bearing Set MS805P20 - Oldsmobile 260-403 V8

Name: Clevite Oldsmobile 260 307 330 350 403 V8 1964-90 Main Bearing Set
Brand: Clevite
Price: 177.26 USD
Availability: InStock

Clevite Oldsmobile 260 307 330 350 403 V8 1964-90 Main Bearing Set

$177.26

Only 2 left in stock

Clevite Main Bearing Set for Oldsmobile 260-403 V8 engines (1964-1990). A well-built replacement for worn engine bearings.

Key Features

Fits Oldsmobile 260, 307, 330, 350, and 403 V8 engines from 1964-1990.
Features a tri-metal construction for durability and load handling.
Steel-backed overlay bonded to a lead-tin-copper alloy.
Designed to maintain consistent oil film thickness for reduced friction.
Well-built replacement for worn engine main bearings.

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Will this fit your vehicle?

Product Details

These Clevite main bearings are built with a tri-metal construction, featuring a steel-backed overlay that’s bonded to a lead-tin-copper alloy. This design helps them handle the heavy loads and heat generated inside your V8 engine. If you’re rebuilding the bottom end of your Oldsmobile, Buick, Cadillac, or Chevrolet with a 260, 307, 330, 350, or 403 cubic inch V8, these bearings are a solid option to ensure proper crankshaft support.

The tri-metal material is known for its ability to conform to the crankshaft journal, which helps maintain consistent oil film thickness. This is crucial for reducing friction and wear, especially in engines that have seen a lot of miles or are being put back into service after a rebuild. Clevite has been making engine bearings for a long time, and this set is designed to fit right into the specified engines, making installation straightforward for a mechanic or a dedicated DIYer.

This set is designed for a range of vehicles, including popular models like the Oldsmobile Cutlass Supreme, Chevrolet Caprice, and Buick Electra from the 1970s and 1980s. When you’re putting your engine back together, using well-built bearings like these is key to a long-lasting rebuild.