What does 0.25mm undersize mean for these bearings?

This means the bearings are slightly smaller than standard size by 0.25mm (0.010 inches). They are intended for use with a crankshaft that has been machined down to this specific undersize dimension, typically during an engine rebuild or repair.

Are these bearings suitable for a stock engine rebuild?

These are high-performance bearings and are specifically 0.25mm undersize. They are best suited for engines where the crankshaft has been machined to this dimension, often as part of a performance build or a rebuild of an engine with a worn crankshaft.

What other parts are needed when installing rod bearings?

When replacing rod bearings, it's essential to have the crankshaft inspected and machined to the correct size if necessary. You'll also need new rod bolts and nuts, assembly lube, and potentially new piston rings and seals for a complete engine rebuild.

ACL Rod Bearing Set 4B1146H-.25 for Mitsubishi 4G63/4G64 6 B

Name: ACL Mitsubishi 4G63/4G64 6 Bolt 1st Gen DSM 0.25mm Oversized High Performance Rod Bearing Set
Brand: ACL
SKU: acl-acl-mitsubishi-4g63-4g64-6-bolt-1st-gen-dsm-0-25mm-oversized-high-performanc-t14-12952
Price: 45.90 USD
Availability: InStock

ACL Mitsubishi 4G63/4G64 6 Bolt 1st Gen DSM 0.25mm Oversized High Performance Rod Bearing Set

$45.90

Only 7 left in stock

ACL 4B1146H-.25 rod bearing set for Mitsubishi 4G63/4G64 6 Bolt DSM. 0.25mm undersize.

Key Features

Fits 1971-1992 Dodge, Eagle, Hyundai, Mitsubishi, and Plymouth vehicles.
This is a 0.25mm (0.010 inch) undersize connecting rod bearing set.
Designed for Mitsubishi 4G63 and 4G64 6-bolt engines.
High-performance bearing material for demanding applications.
Set includes bearings for all connecting rods.

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Will this fit your vehicle?

Product Details

ACL has been making engine bearings for decades, and this rod bearing set for your Mitsubishi 4G63/4G64 6 Bolt DSM is one of their staples. These bearings are crucial for keeping your engine running smoothly by providing a low-friction surface between the connecting rod and the crankshaft. When you're rebuilding an engine or dealing with worn bearings, getting the right size is key, and this set is precisely 0.25mm (0.010 inches) undersize, designed to work with crankshafts that have been machined to match.

This set is built with a high-performance material designed to handle the demands of performance engines. The precise undersize means they're intended for a crankshaft that's been reconditioned or machined down to this specific dimension. Proper installation is vital; these bearings need to be installed with the correct clearances and lubrication to ensure they protect your crankshaft and connecting rods effectively. If you're working on a 1st generation DSM or a similar engine that uses the 6-bolt 4G63 or 4G64 configuration, these bearings are a solid choice for a rebuild.

When installing these bearings, make sure to check your crankshaft's condition and dimensions. If your crankshaft hasn't been machined to the 0.25mm undersize, you'll need to have it done by a machine shop before installing this set. Always refer to your vehicle's service manual for the correct installation procedures and torque specifications.