What is the advantage of a .001 inch oil clearance?

A tighter oil clearance, like the .001 inch specified for this set, helps maintain higher oil pressure and can improve the efficiency of your engine. This is often preferred in performance applications where precise control over oil flow is beneficial.

Do these bearings come with assembly lube?

This set includes the main bearings only. It is highly recommended to use a quality engine assembly lubricant on the bearing surfaces and crankshaft journals during installation to ensure proper lubrication from the first rotation.

Can I use these bearings if my crankshaft has been machined undersize?

No, this is a Standard (STD) size bearing set. If your crankshaft has been machined undersize (e.g., .010" or .020" undersize), you will need to purchase bearings specifically sized for that condition.

ACL Nissan L20/L24/L28 1998cc/2393cc/2753cc STD Size High Perf Main Bearing Set w/.001 Oil Clearance

Specifications

Brand: ACL
Part #: 7M1172HX-STD
UPC: 9315726453766

ACL Nissan L20/L24/L28 1998cc/2393cc/2753cc STD Size High Perf Main Bearing Set w/.001 Oil Clearance

Name: ACL Nissan L20/L24/L28 1998cc/2393cc/2753cc STD Size High Perf Main Bearing Set w/.001 Oil Clearance
Brand: ACL
SKU: acl-acl-nissan-l20-l24-l28-1998cc-2393cc-2753cc-std-size-high-perf-main-bearing--t14-312819
Price: 289.75 USD
Availability: InStock

$289.75

Only 3 left in stock

ACL Nissan L20/L24/L28 STD Main Bearing Set. High performance with .001 oil clearance.

Key Features

Fits 1998cc, 2393cc, and 2753cc Nissan L20, L24, and L28 engines.
Standard (STD) size bearings for use with a factory-spec or freshly machined crankshaft.
Features a performance-oriented .001 inch oil clearance for improved oil pressure and efficiency.
Constructed with a high-performance overlay material for increased durability.
Designed for classic Nissan Z-cars and other L-series powered vehicles.
Verified fitment for Nissan 240Z, 260Z, 280Z, 280ZX, 810, and Maxima.

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Product Details

ACL has been making engine bearings for decades, and this High Performance Main Bearing Set for your Nissan L20, L24, or L28 engine is one of their staples. These bearings are crucial for keeping your crankshaft spinning smoothly within the engine block. They create a thin, controlled film of oil that separates the rotating metal surfaces, preventing direct contact and wear. This set is designed with a specific .001 inch oil clearance, which is a tighter tolerance than stock, helping to reduce oil pressure loss and improve overall engine efficiency, especially in performance applications.

Built with a high-performance overlay material, these ACL bearings offer solid durability for engines that see more demanding use. The STD (standard) sizing means they are intended for use with a crankshaft that has not been machined undersize. Proper installation is key; ensure your crankshaft journals are clean and within factory specifications before installing these bearings. If your engine has been rebuilt or modified for performance, getting the oil clearance just right is important for both longevity and power delivery.

This set fits a range of classic Nissan L-series engines, including those found in the 240Z, 260Z, 280Z, 280ZX, 810, and Maxima models from the 1970s and early 1980s. Make sure to check the specific year and model compatibility to ensure you're getting the right set for your build.