What does '0.025 undersize' mean for these rod bearings?

This means the bearings are manufactured to be 0.025 inches smaller in diameter than the standard size. This is typically used when the crankshaft journals have been ground down to remove imperfections or to achieve a specific clearance. You'll need to ensure your crankshaft journals have been machined to match this undersize.

What engine families do these ACL rod bearings fit?

These bearings are specifically made for Nissan's CA18 and C20 engine families. These engines were common in various Nissan models during the 1980s and early 1990s.

What is the typical construction of these high-performance bearings?

ACL commonly uses a tri-metal construction for their high-performance bearings. This involves multiple layers of materials, typically steel for strength, a copper-lead alloy for load capacity, and a babbitt overlay for conformability and embeddability, offering good durability.

Specifications

Brand: ACL
Part #: 4B1630H-.025
UPC: 9315726152386

ACL Nissan CA18/C20 0.025 Oversized High Performance Rod Bearing Set

Name: ACL Nissan CA18/C20 0.025 Oversized High Performance Rod Bearing Set
Brand: ACL
SKU: acl-acl-nissan-ca18-c20-0-025-oversized-high-performance-rod-bearing-set-t14-308927
Price: 56.63 USD
Availability: BackOrder

$56.63

On Backorder

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

Fits 1982-1989 Nissan Stanza. ACL 0.025" undersize rod bearings for CA18/C20 engines, offering improved oil clearance for high-performance builds.

Key Features

Fits 1982-1989 Nissan Stanza, 1984-1988 200SX, 1988-1989 Pulsar NX, and 1983-1986 Sentra.
ACL high-performance rod bearing set.
Features a 0.025 inch undersize to accommodate crankshaft grinding.
Tri-metal construction offers good strength and load-bearing capacity.
Designed for CA18 and C20 engine applications.

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Will this fit your vehicle?

About this part

Product Details

You get a full set of high-performance rod bearings in this kit, which means one box handles the critical internal engine work for your Nissan. These ACL bearings are specifically sized at 0.025 inches undersize, giving you a bit more clearance between the crankshaft and connecting rod. This extra space is important when you're building an engine for more power, as it allows for a slightly larger oil film, which helps keep things cool and lubricated under higher loads and RPMs. They're a solid option if you're rebuilding a CA18 or C20 engine and want to ensure reliable performance.

ACL has been making engine bearings for a long time, and these are well-built for the job. They use a tri-metal construction that's known for its strength and ability to handle the pressures inside an engine. When you're installing these, make sure your crankshaft journals are clean and within the specified tolerance for the 0.025 undersize. It's a good idea to have your machine shop check the crank journals before you put these in, just to be sure everything is perfect for the new bearings.