What does the +0.75 sizing mean for these main bearings?

The +0.75 sizing indicates that these bearings are designed for a crankshaft that has been machined undersize by 0.00075 inches during an engine rebuild. This allows the bearing to properly fit the reduced diameter.

What is the advantage of bimetal bearings?

Bimetal bearings, like these from King, use an aluminum alloy base. This construction offers good load-carrying capacity and conformability, making them suitable for the high-stress environment within an engine's bottom end.

Do I need to purchase anything else with these main bearings?

When rebuilding an engine, it's recommended to replace the main bearing set along with other critical components such as rod bearings, piston rings, and gaskets. Always refer to your vehicle's service manual for a complete list of parts needed for your specific engine rebuild.

Specifications

Brand: King Engine Bearings
Part #: MB5304AM0.75
UPC: 611500405594

King Kia/Mazda DOHC 16 Valve/SOHC 16 Valve/SOHC 8 Valve (Size +0.75) Main Bearing Set

Name: King Kia/Mazda DOHC 16 Valve/SOHC 16 Valve/SOHC 8 Valve (Size +0.75) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-kia-mazda-dohc-16-valve-sohc-16-valve-sohc-8-valve-siz-t14-280160
Price: 29.45 USD
Availability: BackOrder

$29.45

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

King Main Bearing Set for Kia/Mazda DOHC/SOHC engines. Size +0.75. A well-built replacement for engine rebuilds.

Key Features

Fits a range of Mazda, Kia, Ford, and Mercury vehicles with B6, B6-T, ZM, B3, and B5 engines.
Main bearing set sized +0.75 for use with a machined crankshaft.
Constructed with a bimetal (aluminum base) material for durability.
Designed for DOHC 16 Valve, SOHC 16 Valve, and SOHC 8 Valve engine configurations.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

About this part

Product Details

When you're rebuilding the bottom end of your engine, getting the main bearings right is crucial for smooth operation and longevity. This King Engine Bearings Main Bearing Set is designed for a range of popular 4-cylinder engines found in vehicles like the Mazda Protege, Ford Escort, and Kia Rio. These bearings are made with a bimetal construction, meaning they have an aluminum base, which helps them handle the loads and heat generated during engine operation.

This particular set is sized +0.75, which is important if you're dealing with a crankshaft that has been machined undersize during a rebuild. King is a well-known name in engine bearings, and this set offers a solid option for getting your engine back in good working order. They're built to handle the demands of daily driving and are a popular choice for mechanics when they need reliable replacement bearings.