What does the 0.25mm undersize mean for my engine?

An undersize bearing like this 0.25mm set is used when the crankshaft journals have been machined down to correct for wear or damage. Using an undersize bearing ensures the correct clearance between the bearing and the crankshaft is maintained for proper oil flow and support.

What is the benefit of the performance coating on these bearings?

The performance coating adds an extra layer of protection against friction and wear. It's particularly beneficial during engine break-in and helps maintain the oil film, reducing the risk of metal-to-metal contact under load.

Are these bearings suitable for a stock engine rebuild?

Yes, these bearings are suitable for stock engine rebuilds, especially if the crankshaft has been machined to a 0.25mm undersize. The performance coating offers an advantage even in stock applications by providing enhanced protection.

Specifications

Brand: King Engine Bearings
Part #: MB5259XPC0.25
UPC: 611500630583

King Acura B18A1/B1/C1/C5 K20A / K24A (Size 0.25mm) Performance Coated Main Bearing Set

Name: King Acura B18A1/B1/C1/C5 K20A / K24A (Size 0.25mm) Performance Coated Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-acura-b18a1-b1-c1-c5-k20a-k24a-size-0-25mm-performance-t14-714124
Price: 92.81 USD
Availability: BackOrder

$92.81

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

King Engine Bearings main bearing set for Acura B18A1/B1/C1/C5 K20A/K24A engines. Size 0.25mm.

Key Features

Fits Acura B18A1, B18B1, B18C1, B18C5, K20A, and K24A engines.
Main bearing set is 0.25mm undersize.
Features a performance coating for improved wear resistance and reduced friction.
Helps maintain oil film thickness during engine operation.
Designed for engine rebuilding and refreshing applications.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This is a King Engine Bearings Performance Coated Main Bearing Set, specifically for Acura B18A1, B18B1, B18C1, B18C5, K20A, and K24A engines. These bearings are 0.25mm undersize, which is important if you're rebuilding or refreshing an engine that has had previous machining work done on the crankshaft journals. The performance coating helps reduce friction and wear, especially during the critical break-in period and under demanding conditions.

King Engine Bearings uses a unique combination of materials and advanced manufacturing techniques to create bearings that hold up well. The performance coating on these main bearings is designed to provide an extra layer of protection, helping to maintain oil film thickness and prevent metal-to-metal contact. This is crucial for the longevity of your engine, especially when dealing with higher performance applications or engines that see frequent use. They fit right and are a solid option when you need reliable internal engine components.