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

The +0.50mm sizing indicates that these bearings are intended for use on connecting rod journals that have been machined down by 0.50mm. This is common in engine rebuilding to ensure a fresh, perfectly round surface for the new bearings.

What is the benefit of the pmax black coating?

The pmax black coating is a specialized layer designed to reduce friction and wear, particularly under high-stress conditions found in racing or performance applications. It helps protect the bearing surface and maintain oil film integrity.

Do these bearings come with installation hardware?

This product is a set of connecting rod bearings. Installation hardware, such as new rod bolts, is typically sold separately and should be sourced according to your engine's specific service manual recommendations.

Specifications

Brand: King Engine Bearings
Part #: CR6640XPC0.5
UPC: 611500612787

King Engine Bearings BMW M20/M50 2.0L/2.5L/2.7L (Size +0.50mm) Connecting Rod Bearing Set

Name: King Engine Bearings BMW M20/M50 2.0L/2.5L/2.7L (Size +0.50mm) Connecting Rod Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-m20-m50-2-0l-2-5l-2-7l-size-0-50mm-t14-770007
Price: 221.38 USD
Availability: BackOrder

$221.38

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King Engine Bearings CR6640XPC0.5 connecting rod bearing set for BMW M20/M50 2.0L-2.7L. Size +0.50mm. Features a pmax black racing coating.

Key Features

Fits a wide range of BMW M20 and M50 engines, including 2.0L, 2.5L, and 2.7L displacements.
This set is sized +0.50mm, intended for connecting rod journals that have been machined undersize.
Features King's pmax black coating, a specialized layer designed for racing applications to reduce friction and wear.
Well-built connecting rod bearings suitable for engine rebuilds and performance applications.
Includes a set of connecting rod bearings for the specified BMW engine applications.

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About this part

Product Details

The pmax black coating on these King Engine Bearings connecting rod bearings is a key detail for performance builds. This specialized coating helps reduce friction and wear, especially under the high-stress conditions found in racing applications. These bearings are specifically sized at +0.50mm, meaning they are intended for engines where the connecting rod journals have been machined down by 0.50mm to ensure a fresh, perfectly round surface for the new bearings to seat against.

Designed for a range of BMW M20 and M50 engines, including popular models like the 325i, 525i, and Z3, these bearings are a well-built option for rebuilding or enhancing your engine. The +0.50mm sizing indicates these are not a direct stock replacement but rather for engines that have undergone specific machine work. This attention to detail in sizing and coating makes them a solid choice for those who understand the nuances of engine building and are looking for reliable components.

When installing bearings sized for machined journals, it's crucial to ensure the crankshaft journals are properly prepared and measured to confirm they match the +0.50mm undersize specification. Using the correct torque sequence and specifications from your engine's service manual is also essential for proper seating and performance.