What does '0.25mm undersize' mean for these bearings?

This means the bearings are manufactured to be slightly smaller than the standard size. They are intended for use with a crankshaft that has 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 bearings are suitable for stock rebuilds, especially if the crankshaft has been machined to the 0.25mm undersize specification. They are also a solid option for performance builds where precise oil clearance is important.

Does this kit include all the main bearings needed for the engine?

Yes, this is a complete set of main bearings designed to replace all the main bearings in the specified Nissan CA18 and C20 engines.

1982-1989 Nissan Stanza Main Bearings | ACL 5M1633H-.25

Name: ACL Nissan CA18/C20 0.25 Oversized High Performance Main Bearing Set
Brand: ACL
Price: 103.17 USD
Availability: InStock

ACL Nissan CA18/C20 0.25 Oversized High Performance Main Bearing Set

$103.17

Only 1 left in stock

Fits 1982-1989 Nissan Stanza. ACL 0.25mm undersize main bearing set for CA18/C20 engines. Improves oil clearance for better lubrication.

Key Features

Fits 1982-1989 Nissan Stanza, 1983-1986 Nissan Sentra, 1988-1989 Nissan Pulsar NX, and 1984-1988 Nissan 200SX.
Main bearing set for Nissan CA18 and C20 engines.
Bearings are 0.25mm undersize, intended for use with a machined crankshaft.
Well-built for high performance applications.
Helps establish proper oil clearance for engine lubrication and longevity.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

You get a full set of main bearings in this kit, which means one box handles the whole job for your Nissan's engine. These ACL bearings are specifically sized at 0.25mm undersize, which is important for rebuilding or modifying your CA18 or C20 engine. When you're looking to get your engine running right after a rebuild, or if you've made some performance upgrades, setting the correct oil clearance is crucial. These bearings help ensure that your crankshaft has the right amount of space to spin freely while still getting enough oil to keep everything cool and lubricated.

ACL has been making engine bearings for a long time, and these are well-built for performance applications. The 0.25mm undersize means they are designed to be used with a crankshaft that has been machined down by 0.25mm. This is a common practice when rebuilding an engine to ensure a fresh, perfectly round surface for the bearings to run on. Getting the oil clearance just right helps prevent premature wear and can even help with oil pressure, especially in modified or high-revving engines.

When you're putting your engine back together, using a matched set of bearings like these from ACL is a smart move. Make sure you have the correct specifications for your crankshaft machining before ordering, as these are specifically for a 0.25mm undersize application.