What does 'undersize 0.010 inch' mean for these bearings?

This means the bearings are manufactured to be 0.010 inches smaller in diameter than a standard-sized bearing. They are used when the crankshaft journals have been machined down by 0.010 inches to correct wear or damage.

What type of engine is this bearing set best suited for?

These bearings are ideal for low to medium-load engines. Their bi-metal aluminum material and lead-free composite construction are designed to handle typical operating conditions without excessive stress.

Does this bearing set come with installation hardware?

This product is a set of crankshaft main bearings only. Installation hardware, such as main bearing bolts or seals, is typically sold separately and should be sourced according to your vehicle's service manual.

Specifications

Brand: King Engine Bearings
Part #: MB5518AM010
UPC: 611500197413

King Engine Bearings AMC/Jeep 390/401 Crankshaft Main Bearing Set - Undersize 0.10IN

Name: King Engine Bearings AMC/Jeep 390/401 Crankshaft Main Bearing Set - Undersize 0.10IN
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-amc-jeep-390-401-crankshaft-main-beari-t14-429667
Price: 65.77 USD
Availability: InStock

$65.77

Only 8 left in stock

King Engine Bearings AMC/Jeep 390/401 Crankshaft Main Bearing Set - Undersize 0.010IN. Ideal for low to medium-load engines.

Key Features

This product is a set of crankshaft main bearings.
The bearings are 0.010 inch undersize.
They are designed for AMC and Jeep 390 and 401 cubic inch engines.
Constructed with a bi-metal aluminum material.
Features a lead-free, environmentally safe composite.
Ideal for low to medium-load engines.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

This set includes crankshaft main bearings from King Engine Bearings, specifically sized 0.010 inch undersize for AMC and Jeep 390 and 401 cubic inch engines. These bearings are built with a bi-metal aluminum material and feature a lead-free composite that's environmentally safe, making them a solid option for low to medium-load applications. King has been specializing in engine bearings since 1960, focusing on supplying well-built components for a range of vehicles.

The bi-metal construction offers good strength and wear resistance, while the lead-free composite layer helps manage loads effectively in less demanding engine builds. Because these bearings are 0.010 inch undersize, they are intended for crankshafts that have been machined down by that amount to correct wear or out-of-round conditions. Proper installation, including ensuring the crankshaft journals are clean and within the specified undersize tolerance, is key to their performance and longevity.