What does the +0.50mm sizing mean for these bearings?

The +0.50mm sizing indicates that these bearings are thicker than standard. They are designed to be used when the engine's crankshaft has been machined down by 0.50mm to remove imperfections or wear. This ensures the correct oil clearance is maintained with the reduced journal size.

What is the King XP material?

King's XP material is a well-built overlay designed for enhanced durability and performance. It's formulated to resist wear and maintain consistent oil film thickness under demanding engine conditions.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary main bearings to rebuild the bottom end of the specified engine.

Specifications

Brand: King Engine Bearings
Part #: MB5745XPGC0.5
UPC: 611500630613

King Engine Bearings Subaru Fa20/Toyota 4U-Gse (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings Subaru Fa20/Toyota 4U-Gse (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-subaru-fa20-toyota-4u-gse-size-0-50mm--t14-770933
Price: 190.80 USD
Availability: BackOrder

$190.80

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King Engine Bearings Subaru FA20/Toyota 4U-GSE main bearing set. Size +0.50mm.

Key Features

This is a main bearing set for Subaru FA20 and Toyota 4U-GSE engines.
Bearings are sized +0.50mm, intended for a machined crankshaft.
Constructed with King's XP material for improved durability.
Helps maintain proper oil clearances and reduce friction.
Designed to handle the stresses of performance engines.

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About this part

Product Details

If you're rebuilding the bottom end of your Subaru FA20 or Toyota 4U-GSE engine, getting the main bearings right is crucial for long-term health. These King Engine Bearings are specifically sized at +0.50mm, meaning they're designed to compensate for a crankshaft that has been machined down by 0.50mm during a rebuild. Proper main bearings ensure the crankshaft spins smoothly within the engine block, maintaining the correct oil clearances and reducing friction.

King uses their XP material, a well-built overlay that's known for its durability and ability to handle the stresses of performance engines. This material helps to resist wear and maintain consistent oil film thickness, which is vital for preventing damage, especially in modified or high-performance applications. The +0.50mm sizing is important because it means these bearings are intended for a specific stage of crankshaft machining, ensuring a precise fit and the correct clearances when paired with a properly prepared crankshaft.

When installing these bearings, always refer to the manufacturer's service manual for the correct torque specifications and assembly procedures. Ensuring the crankshaft journals are clean and properly lubricated before installation is key to a successful rebuild.