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

The +0.50mm designation indicates that these bearings are 0.50mm larger than the standard size. This is used when the crankshaft journals have been machined down (undersized) during an engine rebuild to remove wear or damage.

What is the material of these main bearings?

These main bearings are constructed with a bimetal design, featuring an aluminum base. This material combination is chosen for its good bearing properties and compatibility with crankshafts.

Do I need to machine my crankshaft to use these bearings?

You would only need to machine your crankshaft to a +0.50mm undersize if the original journals are worn beyond the standard size. If your crankshaft is still standard size, you would need standard size bearings.

King Engine Bearings BMW M10B15/18/20 (Size +0.50mm) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB544AM1.5
UPC: 611500167034

King Engine Bearings BMW M10B15/18/20 (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings BMW M10B15/18/20 (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
Price: 107.37 USD
Availability: InStock

$107.37

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King Engine Bearings Main Bearing Set for BMW M10 engines. Features bimetal construction and a 0.50mm undersize for rebuilding.

Key Features

Fits a wide range of BMW M10 engines, including 1500, 1800, 2000, 2002, 318i, and 320i models.
Main bearing set designed for BMW M10B15, M10B18, and M10B20 engine codes.
Features a bimetal construction with an aluminum base for durability.
This set is sized at +0.50mm, suitable for crankshafts machined to this undersize.
Helps ensure proper oil clearance and crankshaft support during engine operation.

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Product Details

If you're rebuilding the bottom end of your BMW M10 engine, a fresh set of main bearings is crucial for proper crankshaft support and oil flow. These main bearings from King Engine Bearings are specifically made for the M10 engine found in a range of BMW models, including the 2002, 318i, and 320i.

Built with a bimetal aluminum base, these bearings offer a solid foundation for your engine's rotating assembly. This set is sized at +0.50mm, meaning they are 0.50mm larger than standard, which is important if your crankshaft has been machined undersize during a rebuild. Using the correct bearing size is key to maintaining the proper oil clearance, which is vital for engine longevity and performance.

When you're putting an engine back together, getting the right parts makes all the difference. These King bearings are a popular choice for M10 rebuilds, offering a well-built component to get your engine running smoothly again.