What does the '+0.25 Oversize' mean for these bearings?

The '+0.25 Oversize' designation means these bearings are thicker than standard by 0.25mm. They are intended for use when the engine's crankshaft has been machined down by 0.25mm, typically to repair wear or damage, to restore proper oil clearance.

What is the SI material used in these bearings?

SI stands for Silicon-enhanced overlay. This material is a high-performance bearing surface developed by King Engine Bearings, known for its enhanced durability and resistance to wear under demanding engine conditions.

Do I need to purchase anything else with this main bearing set?

When installing main bearings, it is highly recommended to also replace the connecting rod bearings and ensure you have new main bearing cap bolts and seals. Always refer to the manufacturer's service manual for a complete list of required parts and procedures.

Questions? Call Us:631-982-0042

M-F 8AM-4PM ET

Trusted Since 1957

Est. 1957

Specifications

Brand: King Engine Bearings
Part #: MB5662SI0.25
UPC: 611500587399

King Engine Bearings BMW N42 B20/N46 B20 Main Bearing Set +0.25 Oversize

Name: King Engine Bearings BMW N42 B20/N46 B20 Main Bearing Set +0.25 Oversize
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-n42-b20-n46-b20-main-bearing-set-0-t14-343759
Price: 76.84 USD
Availability: InStock

$76.84

In Stock

King Engine Bearings Main Bearing Set MB5662SI0.25 +0.25 Oversize for BMW N42 B20/N46 B20 engines.

Key Features

Fits BMW N42 B20 and N46 B20 engines.
Main bearing set is 0.25mm oversize.
Features King's SI (Silicon-enhanced overlay) material for improved durability.
Supports the crankshaft and ensures proper oil clearance.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This is a King Engine Bearings Main Bearing Set, part number MB5662SI0.25. It is designed for BMW N42 B20 and N46 B20 engines and is 0.25mm oversize. Main bearings are critical for supporting the crankshaft within the engine block, ensuring it spins smoothly and without excessive wear. When rebuilding or repairing an engine, especially if the crankshaft has been machined, using the correct size bearings is essential for proper oil clearance and engine longevity.

This set features King's high-performance SI (Silicon-enhanced overlay) material. This material is known for its durability and ability to withstand the pressures and temperatures found in modern engines. The 0.25mm oversize means these bearings are intended for use when the crankshaft journals have been ground down by 0.25mm to remove imperfections or to prepare for new bearings. Using the correct oversize is crucial for achieving the proper oil clearance, which is vital for lubrication and preventing premature wear.