What does the +0.25mm sizing mean for these bearings?

The +0.25mm sizing indicates that these bearings are intended for use with a crankshaft that has been machined down by 0.25mm. This is a common practice during engine rebuilds to ensure proper oil clearance when the crankshaft journals have been worn or resurfaced.

What is the pMax Black racing line construction?

The pMax Black line features a tri-metal construction, which is known for its strength and durability. This design is often used in performance applications but offers a well-built option for any engine rebuild where reliable bearing performance is important.

Do these bearings come with new hardware?

This product is a set of crankshaft main bearings. Hardware such as main cap bolts or oil seals are typically sold separately and should be replaced during an engine rebuild.

Specifications

Brand: King Engine Bearings
Part #: MB5082XP0.25
UPC: 611500573125

King Engine Bearings BMW M40/M42/M43 1.6L/1.8L (Size +0.25mm) Crankshaft Main Bearing Set

Name: King Engine Bearings BMW M40/M42/M43 1.6L/1.8L (Size +0.25mm) Crankshaft Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-m40-m42-m43-1-6l-1-8l-size-0-25mm--t14-170018
Price: 229.40 USD
Availability: BackOrder

$229.40

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King Engine Bearings crankshaft main bearing set for BMW M40, M42, M43 1.6L/1.8L engines. Size +0.25mm. A solid option for engine rebuilds.

Key Features

Fits BMW M40, M42, and M43 engines with 1.6L and 1.8L displacements.
This is a crankshaft main bearing set, sized +0.25mm for use with machined crankshafts.
Features King's pMax Black racing line tri-metal construction.
Designed to support the crankshaft and handle engine loads during operation.

This bearing set is designed for BMW M40, M42, and M43 engines with 1.6L and 1.8L displacements. It is sized +0.25mm, indicating it is for use with a crankshaft that has been machined to this undersize.

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About this part

Product Details

If you're rebuilding the engine in your BMW M40, M42, or M43 model with a 1.6L or 1.8L displacement, getting the crankshaft main bearings right is crucial. These bearings sit between the crankshaft and the engine block, supporting the rotating assembly and handling significant loads. This set from King Engine Bearings is specifically designed for these BMW engines and comes at a +0.25mm size, meaning they are intended for use when the crankshaft journals have been machined down by 0.25mm during a rebuild.

This particular set is from King's pMax Black racing line. While these are often used in performance applications, their tri-metal construction offers a well-built and durable option for any engine rebuild where reliability is key. The material composition is designed to handle the stresses of engine operation, providing a solid foundation for your crankshaft. Because these are an oversize bearing, they are meant to be used with a crankshaft that has been professionally machined to the correct undersize to ensure proper clearance and oil film.

When rebuilding an engine, using bearings that match the machined specifications of your crankshaft is essential for proper oil clearance and long-term engine health. This set ensures you have the correct size and a well-made component from a reputable bearing manufacturer.