What does 0.25mm undersize mean for these bearings?

This means the bearings are designed to fit a crankshaft where the main journals have been machined down by 0.25mm. This is common when cleaning up worn or damaged crankshaft journals during an engine rebuild.

Are these bearings suitable for a turbocharged engine?

Yes, ACL bearings are well-built and commonly used in performance applications, including turbocharged engines like the K20C1. Proper installation and oil clearance are critical for reliability.

What is the main function of main bearings?

Main bearings sit between the crankshaft and the engine block. They support the crankshaft, allowing it to rotate smoothly while maintaining the correct oil clearance for lubrication.

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ACL Honda K20C1 2.0L Turbo 0.25 Oversized Main Bearing Set

Specifications

Brand: ACL
Part #: 5M1985H-.25
UPC: 9315726453803

ACL Honda K20C1 2.0L Turbo 0.25 Oversized Main Bearing Set

Name: ACL Honda K20C1 2.0L Turbo 0.25 Oversized Main Bearing Set
Brand: ACL
Price: 123.62 USD
Availability: InStock

$123.62

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Fits 2017-2021 Honda Civic. ACL K20C1 2.0L Turbo 0.25mm undersize main bearing set for engine rebuilds.

Key Features

Fits 2017-2021 Honda Civic.
ACL 0.25mm undersize main bearing set for K20C1 2.0L Turbo engines.
Designed to support the crankshaft and maintain proper oil clearance.
Well-built for performance applications and engine rebuilds.

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Fits this vehicle

Honda Civic 2017-2021

Product Details

Already running a built K20C1 engine? This 0.25mm undersize main bearing set from ACL is the next piece of the puzzle for your 2017-2021 Honda Civic. These bearings are crucial for keeping your crankshaft properly supported and aligned within the engine block, especially when you're pushing the limits with a turbo setup. Getting the right fitment here is key to a healthy, long-lasting engine rebuild.

ACL has been making engine bearings for a long time, and this set is well-built for the demands of a performance K20C1. The 0.25mm undersize means these are intended for use when the main journals on your crankshaft have been machined down by 0.25mm to clean them up or correct wear. This ensures a precise fit and proper oil clearance, which is critical for lubrication and preventing premature wear. When you're rebuilding an engine, especially one that's turbocharged, using bearings from a reputable manufacturer like ACL gives you peace of mind.