What does 'extra oil clearance' mean for these bearings?

Extra oil clearance means these bearings have a slightly thinner wall than standard bearings. This creates a larger gap for oil between the crankshaft journal and the bearing, which can help with oil flow and cooling in high-performance engines.

Are these bearings suitable for a stock engine rebuild?

While these bearings are designed for high-performance applications, they are standard size and can be used in a stock rebuild if the crankshaft journals are in good condition and within factory specifications. However, the extra oil clearance is most beneficial in modified or high-RPM engines.

Do I need to measure my crankshaft journals when using these bearings?

Yes, it's always recommended to measure your crankshaft journals to ensure they are within the manufacturer's specified tolerances and are not worn. These are standard size bearings, so they are intended for journals that are not undersized due to wear.

ACL Connecting Rod Bearings 4B1146HX-STD - High Performance

Name: ACL Mitsubishi 4G63/4G64 6 Bolt 1st Gen DSM Standard Size High Performance w/ Extra Oil Clearance Ro
Brand: ACL
SKU: acl-acl-mitsubishi-4g63-4g64-6-bolt-1st-gen-dsm-standard-size-high-performance-w-t14-12953
Price: 45.90 USD
Availability: InStock

ACL Mitsubishi 4G63/4G64 6 Bolt 1st Gen DSM Standard Size High Performance w/ Extra Oil Clearance Ro

$45.90

In Stock

ACL connecting rod bearings for Mitsubishi 4G63/4G64 engines. Standard size with extra oil clearance for high-performance builds.

Key Features

Standard size connecting rod bearings with an extra 0.025mm (0.001") oil clearance.
Designed for high-performance Mitsubishi 4G63 and 4G64 engines.
Suitable for 6-bolt, 1st generation DSM applications.
Includes bearings for all connecting rods in the set.
ACL is a well-known manufacturer of engine bearings.

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Will this fit your vehicle?

Product Details

When you're building a performance engine, especially for a Mitsubishi 4G63 or 4G64, the details matter. These ACL connecting rod bearings are designed with an extra 0.025mm (0.001 inch) of oil clearance. This thinner bearing allows for a slightly larger gap between the rod journal and the bearing surface, which can help manage oil flow and temperature in high-RPM applications. They are standard size, meaning they're intended to be used on a crankshaft with factory-spec journals.

ACL has been making engine bearings for a long time, and these are well-built for the demands of a performance build. They're a popular choice for DSM (Diamond-Star Motors) enthusiasts and anyone working on a 6-bolt 4G63 engine from the first generation. If you're looking to get the most out of your engine build and want to ensure proper lubrication at higher speeds, these bearings are a solid option.

This set includes bearings for all the connecting rods. Make sure to check your crankshaft journals for wear and ensure they are within specification before installation. It's always a good idea to refer to your vehicle's service manual for the correct installation procedures and torque specifications.