What is the purpose of undersize bearings?

Undersize bearings are used when the crankshaft journals have been machined down, or ground undersize, to remove imperfections or to prepare for new bearings. Using an undersize bearing ensures the correct oil clearance is achieved between the bearing and the crankshaft.

What material are these bearings made from?

These bearings feature King Engine Bearings' specialized overlay material, which is designed to withstand the demanding conditions of engine operation.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary main bearings required for the engine's crankshaft.

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Specifications

Brand: King Engine Bearings
Part #: MB5799SI0.5
UPC: 611500620249

King Engine Bearings Subaru FA20/ Toyota 4U-GSE/ O/S Housing .005in (Size 0.05) Main Bearing Set

Name: King Engine Bearings Subaru FA20/ Toyota 4U-GSE/ O/S Housing .005in (Size 0.05) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-subaru-fa20-toyota-4u-gse-o-s-housing--t14-432516
Price: 57.28 USD
Availability: BackOrder

$57.28

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King Engine Bearings Subaru FA20/Toyota 4U-GSE main bearing set. Includes 0.05 inch undersize bearings for a precise fit.

Key Features

This product is a main bearing set from King Engine Bearings.
Includes bearings that are 0.005 inches undersize.
Designed for Subaru FA20 and Toyota 4U-GSE engines.

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About this part

Product Details

When you're rebuilding the bottom end of your Subaru FA20 or Toyota 4U-GSE engine, you'll find a set of King Engine Bearings main bearings in the box. This particular set is sized 0.005 inches undersize, which is crucial for achieving the correct oil clearance when the crankshaft journals have been machined to match.

King Engine Bearings are well-known for their durable construction and consistent performance. They use a specialized overlay material that's designed to handle the pressures and temperatures found in performance engines. This overlay helps to protect the bearing surface and ensure long life, especially when paired with a properly machined crankshaft. Getting the oil clearance just right is key to engine health, and using bearings with the correct undersize is a critical step in that process.