What does '0.25mm oversized' mean for these main bearings?

This means the bearings are slightly larger than the standard size by 0.25mm. They are designed to be used when the engine's crankshaft journals have been machined down by 0.25mm to ensure a precise fit and proper oil clearance.

Are these bearings suitable for a stock engine rebuild?

Yes, these high-performance bearings are suitable for both stock rebuilds and engines that are modified or used in demanding applications. Their tight tolerances help maintain oil pressure and support the crankshaft effectively.

What is the most important step during installation?

Ensuring the crankshaft and engine block surfaces are perfectly clean is critical. Proper lubrication of the bearings with assembly oil before installation and torquing to the manufacturer's specifications are also essential for their longevity.

2000-2009 Honda S2000 Main Bearings | ACL 5M1913H-.25

Name: ACL Honda F20C/F22C 0.25mm Oversized High Performance Main Bearing Set
Brand: ACL
SKU: acl-acl-honda-f20c-f22c-0-25mm-oversized-high-performance-main-bearing-set-t14-13004
Price: 82.59 USD
Availability: InStock

ACL Honda F20C/F22C 0.25mm Oversized High Performance Main Bearing Set

$82.59

Only 5 left in stock

Fits 2000-2009 Honda S2000. ACL high performance main bearings, 0.25mm oversized, for F20C/F22C engines.

Key Features

Fits 2000-2009 Honda S2000.
ACL high performance main bearing set for F20C/F22C engines.
Bearings are 0.25mm oversized, intended for use with machined crankshaft journals.
Manufactured to tight tolerances for consistent oil clearance.
Designed to support the crankshaft in high-revving applications.

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Fits this vehicle

Honda S2000 2000-2009

Product Details

ACL has been making engine bearings for decades, and this high-performance main bearing set for your 2000-2009 Honda S2000 is one of their staples. These bearings are crucial for keeping your F20C or F22C engine's crankshaft properly supported and spinning smoothly. When you're rebuilding or refreshing your engine, especially if you're pushing it a bit harder, replacing the main bearings is a key step to ensure long-term reliability.

This set is specifically designed for the high-revving nature of the S2000's engine. They are manufactured to tight tolerances, which helps maintain consistent oil clearance even under demanding conditions. The fact that these are 0.25mm oversized means they are intended for use when the crankshaft journals have been machined down slightly to true them up or account for wear. This ensures a snug fit and proper support for the crankshaft.

When installing these bearings, it's important to follow the manufacturer's recommended procedures, including proper cleaning of the crankshaft and block surfaces, and ensuring correct oil flow to the bearing surfaces. Using the correct torque specifications is also critical for their performance and longevity.