What is the difference between standard size and undersize bearings?

Standard size bearings are meant for crankshafts that are still within their original factory specifications. Undersize bearings are used when a crankshaft has been machined down (ground) to correct for wear or damage, and they are sized to match that specific machined journal size.

What is the tri-metal overlay construction?

Tri-metal bearings have three layers: a steel backing for strength, a softer intermediate layer (often copper-lead alloy) for embeddability and heat dissipation, and a thin overlay (often aluminum-tin alloy) that conforms to the crankshaft and provides a smooth running surface.

Do these bearings come with assembly lube?

This product listing is for the main bearings only. It is recommended to use a high-quality engine assembly lubricant during installation to ensure proper oil film is established before the engine is started.

ACL Main Bearings 4M1149H-STD for Mitsubishi 6G72, 6G73 Engi

Name: ACL Mitsubishi 6G72, 6G72T, 6G73 Main Bearings Standard Size
Brand: ACL
Price: 115.56 USD
Availability: InStock

ACL Mitsubishi 6G72, 6G72T, 6G73 Main Bearings Standard Size

$115.56

Only 2 left in stock

ACL Mitsubishi 6G72, 6G72T, 6G73 Main Bearings Standard Size. These bearings are crucial for proper crankshaft support and oil flow.

Key Features

Fits 32+ vehicle make/model combinations.
Standard size bearings for use with factory-spec crankshafts.
Tri-metal overlay construction offers good strength and conformability.
Designed for Mitsubishi 6G72, 6G72T, and 6G73 engines.
Crucial for proper crankshaft support and oil flow in the engine block.

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Product Details

When you're rebuilding or refreshing the bottom end of your Mitsubishi 6G72, 6G72T, or 6G73 engine, the main bearings are a critical component. These ACL main bearings are built with a tri-metal overlay, a common and well-tested material for engine bearings that offers good strength and conformability to the crankshaft. They are designed to handle the pressures and temperatures found in these engines, ensuring the crankshaft spins smoothly within the block.

ACL has been making engine bearings for a long time, and these are a solid option for many Chrysler, Dodge, Hyundai, Mitsubishi, and Plymouth vehicles from the late 80s through the early 2000s. They are manufactured to standard size, meaning they are intended to be used with a crankshaft that is still within its original specifications. If your crankshaft has been machined undersize due to wear or damage, you would need a different bearing size.

Proper installation is key with any engine bearing. Make sure your crankshaft journals are clean and within tolerance, and that you use the correct assembly lube. These bearings are designed to fit right into the factory main caps and block saddles, making them a straightforward replacement part for a rebuild.