What is the purpose of the extra oiling groove on these bearings?

The extra oiling groove helps to ensure a more consistent and even distribution of oil to the bearing surface. This reduces friction and wear, especially in high-performance engines or during demanding operating conditions.

Are these bearings suitable for a stock engine rebuild?

Yes, these are standard size bearings, meaning they are intended for engines where the crankshaft journals are within factory specifications. They are a well-built option for both stock and performance-oriented rebuilds.

What else might I need when installing these engine bearings?

When installing main bearings, you'll need to ensure the crankshaft journals are clean and within spec, and you'll need a reliable torque wrench to tighten the bearing caps to the manufacturer's specifications. Proper engine oil is also critical.

ACL Engine Bearings 5M1186HX-STD - Mitsubishi 4G63/4G64

Name: ACL Mitsubishi 4G63/4G64 7 Bolt 2nd Gen DSM and EVO I-IV Standard Size High Performance w/ Extra Oil
Brand: ACL
SKU: acl-acl-mitsubishi-4g63-4g64-7-bolt-2nd-gen-dsm-and-evo-i-iv-standard-size-high--t14-13013
Price: 97.48 USD
Availability: InStock

ACL Mitsubishi 4G63/4G64 7 Bolt 2nd Gen DSM and EVO I-IV Standard Size High Performance w/ Extra Oil

$97.48

In Stock

ACL high performance engine bearings for Mitsubishi 4G63/4G64 7-bolt engines. Fits DSM, EVO, Eclipse, Galant, and more.

Key Features

Fits Eagle Summit, Mitsubishi Eclipse, Expo, Expo LRV, Galant, Lancer, and Montero Sport.
Standard size bearings for 7-bolt Mitsubishi 4G63 and 4G64 engines.
Features an extra oiling groove for improved lubrication.
Designed for high-performance applications.
Well-built by ACL, a known engine component manufacturer.

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Product Details

ACL has been making engine components for a long time, and these bearings are well-built for the job. The standard size means they're intended for engines where the crankshaft journals are still within factory specifications. The added oil groove is a smart touch for performance applications, as it helps to ensure a consistent flow of oil to the bearing surface, reducing friction and wear, especially during high-RPM operation or when you've increased the engine's power output. They are designed to fit right into the factory bearing pockets.

When you're putting an engine back together, especially one that's been modified or is seeing hard use, using reliable bearings is crucial for longevity. These ACL bearings are a popular choice for builders looking for a dependable component that offers improved lubrication characteristics over stock. Make sure to follow the manufacturer's installation instructions and proper torque specifications when installing these bearings to ensure optimal performance and engine life.