What does the +0.25mm sizing mean for these bearings?

The +0.25mm sizing indicates that these bearings are larger than standard size. They are intended for use when the crankshaft journals have been machined down by 0.25mm during an engine rebuild or repair to ensure proper oil clearance.

What is the overlay on these bearings made of?

These bearings feature a high-performance overlay that is 0.001 inches thick. This overlay is engineered for improved durability and wear resistance under demanding engine conditions.

Are these bearings suitable for a stock SR20DE engine?

These bearings are specifically sized at +0.25mm, which is an undersize for the crankshaft journals. They are intended for SR20DE engines that have had their crankshaft journals machined to this specific size during a rebuild, not for a completely stock engine with standard journals.

Specifications

Brand: King Engine Bearings
Part #: MB5243XPC0.25
UPC: 611500613081

King Engine Bearings Nissan Sr20DE (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Nissan Sr20DE (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-sr20de-size-0-25mm-main-bearing-t14-770586
Price: 152.19 USD
Availability: BackOrder

$152.19

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King Engine Bearings Nissan SR20DE Main Bearing Set (+0.25mm). For SR20DE engines needing a slightly larger main bearing.

Key Features

Main bearing set for Nissan SR20DE engines.
Bearings are sized +0.25mm for use with machined crankshaft journals.
Features a high-performance overlay that is 0.001 inches thick.
Overlay material is designed for improved durability and wear resistance.
Well-built component for performance engine applications.

These bearings are specifically sized at +0.25mm and are intended for Nissan SR20DE engines where the crankshaft journals have been machined to this size.

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About this part

Product Details

These King Engine Bearings main bearings are built with a high-performance overlay that's .001 inches thick. This advanced overlay is designed to handle the stresses of performance engines, offering improved durability and wear resistance. They are specifically sized at +0.25mm, meaning they are intended for SR20DE engines where the crankshaft journals have been machined to this specific size during a rebuild or repair. This ensures a precise fit and proper oil clearance, which is critical for engine longevity and performance.

King Engine Bearings uses a unique combination of materials and manufacturing processes to create bearings that stand up to demanding use. The overlay's composition is engineered to provide a strong bond with the underlying bearing material, resisting fatigue and deformation even under high loads. This attention to detail in material science and construction means you're getting a well-built component that's ready to perform. When rebuilding an SR20DE, using bearings that are correctly sized and made with durable materials like these is key to a successful and long-lasting engine build.

For SR20DE engines that require main bearings to be replaced at a +0.25mm size, this set from King Engine Bearings is a solid option. They are designed to meet the specific needs of engine builders looking for reliable components for their builds.