What does '.25mm oversized' mean for these bearings?

This means the bearings are designed to fit a crankshaft that has had its main journals machined down by 0.25mm. This is a common practice during engine rebuilding to clean up worn or damaged journals.

Are these bearings suitable for a stock engine rebuild?

While these are performance bearings, they can be used in a stock rebuild if the crankshaft has been machined to the .25mm oversized specification. For a completely stock, unmachined crankshaft, you would need a standard size bearing.

What is the typical material composition of these bearings?

ACL typically uses multi-layer bearing materials that combine a steel backing for strength with intermediate layers and a bearing overlay for wear resistance and conformability. This design helps maintain an oil film under load.

ACL Ford/Cosworth 2.0L (YB) .25mm Oversized Performance Main Bearing Set

Specifications

Brand: ACL
Part #: 5M2167H-.25
UPC: 9315726273661

ACL Ford/Cosworth 2.0L (YB) .25mm Oversized Performance Main Bearing Set

Name: ACL Ford/Cosworth 2.0L (YB) .25mm Oversized Performance Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-cosworth-2-0l-yb-25mm-oversized-performance-main-bearing-set-t14-105720
Price: 55.71 USD
Availability: BackOrder

$55.71

On Backorder

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

Fits 1971-1974 Ford Pinto and Mercury Capri. ACL .25mm oversized main bearing set for 2.0L (YB) engines.

Key Features

Fits 1971-1974 Ford Pinto and Mercury Capri.
ACL performance main bearing set for Ford/Cosworth 2.0L (YB) engines.
Bearings are .25mm oversized for use with machined crankshaft journals.
Well-built by ACL with a focus on performance and durability.
Helps ensure proper crankshaft support and oil film retention.

Secure CheckoutFast Shipping631-982-0042

Fits these vehicles

Ford Pinto 1971-1974
Mercury Capri 1971-1974

Product Details

Already running the Cosworth 2.0L (YB) engine in your 1971-1974 Ford Pinto or Mercury Capri? This main bearing set is the next piece of the puzzle for a performance rebuild. These bearings are precision-made by ACL to handle the demands of a performance engine, ensuring the crankshaft stays properly supported under load. They are .25mm oversized, meaning they're designed to be used when the crankshaft journals have been machined down by that amount to clean them up or account for wear.

ACL has been making engine bearings for a long time, and this set is built to last. They use a specific material composition that balances strength with the ability to conform to the crankshaft journals for optimal oil film retention. This is crucial for reducing friction and wear, especially in a performance application where clearances might be tighter or loads higher than stock. When you're rebuilding an engine, getting the main bearings right is critical for its longevity and performance.

When installing these bearings, make sure to follow the manufacturer's instructions for proper cleaning of the crankshaft and block surfaces, as well as the correct lubrication and torque specifications. Using the right assembly lube and torque sequence is key to ensuring these bearings perform as intended and last for the life of the engine.