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

The +1.0mm sizing indicates that these bearings are designed for a crankshaft that has been machined down by 1.0mm. This is a common practice when rebuilding an engine to ensure proper oil clearance with the main journals.

What material are these main bearings made from?

These bearings are made from King's SI-1 material, which is known for its good wear resistance and ability to maintain a consistent oil film.

Do these bearings come with installation instructions?

While specific installation instructions are not provided, these bearings are designed as a direct fit for the specified Subaru EJ engines. Always refer to the manufacturer's engine rebuild manual for detailed installation procedures.

Specifications

Brand: King Engine Bearings
Part #: MB5220SI1.0
UPC: 611500623455

King Engine Bearings Subaru Ej20/Ej22/Ej25 (Incl. Turbo) (Size +1.0mm) Main Bearing Set

Name: King Engine Bearings Subaru Ej20/Ej22/Ej25 (Incl. Turbo) (Size +1.0mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-subaru-ej20-ej22-ej25-incl-turbo-size--t14-770537
Price: 43.64 USD
Availability: BackOrder

$43.64

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King Engine Bearings Subaru EJ20/22/25 Main Bearing Set. Undersize 1.0mm.

Key Features

Main bearing set for Subaru EJ20, EJ22, EJ25, and turbo engines.
Sized +1.0mm, intended for use with a crankshaft machined down by 1.0mm.
Constructed with King's SI-1 material for improved wear resistance.
Helps maintain proper oil clearance for crankshaft protection.

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About this part

Product Details

If you're rebuilding the bottom end of your Subaru EJ20, EJ22, EJ25, or turbo variant engine, a fresh set of main bearings is crucial for proper crankshaft support. These main bearings from King Engine Bearings are specifically sized at +1.0mm, meaning they are designed to be used with a crankshaft that has been machined down by 1.0mm. This ensures a tight, correct oil clearance when paired with the appropriate crankshaft journal size.

King Engine Bearings are well-built with a focus on durability and performance. The SI-1 material used in these bearings offers good wear resistance and helps maintain consistent oil film thickness, which is vital for protecting your crankshaft and ensuring the longevity of your engine rebuild. They are designed to fit right into the Subaru EJ engine block, making installation straightforward for a mechanic familiar with engine assembly.