What does the +1.0mm size mean for these bearings?

The +1.0mm designation indicates that these bearings are undersize by 1.0 millimeter. They are designed to be used when the crankshaft journals have been machined down by 1.0mm during an engine rebuild process.

What is the construction of these main bearings?

These main bearings feature a bimetal construction. This typically means they have a steel backing for strength and a bearing surface made from an aluminum-based alloy, which helps with oil retention and wear resistance.

Are these bearings a direct replacement for all engines listed?

These bearings are designed for specific Mitsubishi engine codes (G25B, 4G54, 4G53) and are +1.0mm undersize. Always confirm your engine code and whether your crankshaft has been machined to this specific size before ordering.

Specifications

Brand: King Engine Bearings
Part #: MB546AM1.0
UPC: 611500167744

King Engine Bearings Mitsubishi G25B/4G54/4G53 (Size +1.0mm) Main Bearing Set

Name: King Engine Bearings Mitsubishi G25B/4G54/4G53 (Size +1.0mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-mitsubishi-g25b-4g54-4g53-size-1-0mm-m-t14-770719
Price: 36.61 USD
Availability: BackOrder

$36.61

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King Engine Bearings Main Bearing Set MB546AM1.0 for Mitsubishi G25B/4G54/4G53 engines. These are +1.0mm undersize bearings for a precise rebuild.

Key Features

Fits a wide range of vehicles including Chrysler Conquest, Dodge Ram 50, and Mitsubishi Mighty Max.
Main bearing set for Mitsubishi G25B, 4G54, and 4G53 engines.
Features a bimetal construction with an aluminum base.
This set is +1.0mm undersize, intended for use on crankshafts machined to that specification.

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About this part

Product Details

If you're rebuilding the bottom end of your Mitsubishi G25B, 4G54, or 4G53 engine, a solid set of main bearings is crucial. This set from King Engine Bearings is built with a bimetal construction, using an aluminum base for good performance. They are specifically sized at +1.0mm, meaning they are intended for crankshaft journals that have been machined down by 1.0mm during an engine rebuild. This ensures a tight, proper fit on the reconditioned crank.

King Engine Bearings is a well-known name in engine components, and this set is designed to meet the needs of a variety of vehicles that used these Mitsubishi engines. The bimetal construction offers a good balance of strength and conformability, which helps to manage oil film and reduce friction. When installing, remember to always use clean assembly lube and follow the manufacturer's torque specifications to ensure these bearings perform as intended.