What does '+0.50mm oversize' mean for these bearings?

This means the bearings are designed to fit a crankshaft that has been machined down by 0.50mm. This is typically done during an engine rebuild to restore proper oil clearance when the original crankshaft journals have been worn or ground undersize.

What is the bimetal construction with an aluminum base?

This refers to the bearing material. A bimetal bearing has multiple layers of metal, with a strong aluminum alloy as the primary bearing surface bonded to a steel backing. This design offers good load-carrying capacity and wear resistance for engine applications.

Are these bearings sold individually or as a set?

This product is a set of connecting rod bearings, which is what you would typically need to replace all the connecting rod bearings in an engine.

King Engine Bearings BMW M10 (Size +0.50mm) Connecting Rod Bearing Set

Specifications

Brand: King Engine Bearings
Part #: CR4439AM1.5
UPC: 611500133664

King Engine Bearings BMW M10 (Size +0.50mm) Connecting Rod Bearing Set

Name: King Engine Bearings BMW M10 (Size +0.50mm) Connecting Rod Bearing Set
Brand: King Engine Bearings
Price: 64.77 USD
Availability: InStock

$64.77

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King Engine Bearings CR4439AM1.5 connecting rod bearing set for BMW M10 engines. Features a bimetal aluminum base and is 0.50mm oversize.

Key Features

Fits 1961-1985 BMW models with M10 engines.
Set includes connecting rod bearings.
Features a bimetal construction with an aluminum base.
Bearings are +0.50mm oversize for use with machined crankshafts.
Designed for engine rebuilding applications.

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Product Details

Built with a bimetal construction on an aluminum base, this connecting rod bearing set from King Engine Bearings is designed for BMW M10 engines. These bearings are a +0.50mm oversize, meaning they are intended for crankshafts that have been machined down by that amount to restore proper clearance. This is a common step when rebuilding an engine to ensure optimal oil clearance and performance.

King Engine Bearings uses a bimetal design, which is a well-known and reliable material choice for engine bearings. This construction helps manage heat and wear effectively, crucial for the demanding environment inside an engine. This set is suitable for a range of BMW models from the 1500 through the 320i, covering many years of M10-powered vehicles.