What does the +0.50mm sizing mean for these bearings?

The +0.50mm sizing indicates that these bearings are designed for a crankshaft that has been machined down by 0.50mm. This is a common practice when rebuilding an engine to clean up wear or damage on the crankshaft journals.

What is the construction of these main bearings?

These bearings feature a bimetal construction with an aluminum base. This type of material helps with heat management and provides a durable surface for the crankshaft to rotate against.

Are these bearings a direct fit for my BMW 318 engine block?

Yes, these bearings are designed as a direct replacement for the main bearings in a BMW 318. They are intended to fit into the engine block after the crankshaft has been machined to the specified +0.50mm size.

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Specifications

Brand: King Engine Bearings
Part #: MB5578AM0.5
UPC: 611500206122

King Engine Bearings B.M.W 318 (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings B.M.W 318 (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-b-m-w-318-size-0-50mm-main-bearing-set-t14-770858
Price: 56.14 USD
Availability: BackOrder

$56.14

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King Engine Bearings main bearing set for BMW 318. Size +0.50mm.

Key Features

Fits BMW 318.
Main bearing set for engine rebuilding.
Sized +0.50mm for use with machined crankshafts.
Constructed with a bimetal (aluminum base) design.

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About this part

Product Details

If you're rebuilding the bottom end of your BMW 318, a fresh set of main bearings is crucial. These bearings sit between the crankshaft and the engine block, supporting the rotating assembly and ensuring smooth operation. This set from King Engine Bearings is specifically sized at +0.50mm, meaning it's intended for use when the crankshaft journals have been machined down by 0.50mm to clean up wear or damage.

King uses a bimetal construction with an aluminum base for these bearings. This design helps manage heat and provides a solid foundation for the bearing surface. Because they are a direct replacement for the factory size, they are designed to fit right into your engine block after the necessary machining has been done.