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

The +0.75mm sizing indicates that these bearings are slightly larger than standard. This is typically used when the engine's main journals have been machined down (e.g., due to wear or for a performance rebuild) and require a larger bearing to achieve the correct oil clearance.

What is a bimetal bearing construction?

A bimetal bearing typically consists of a steel backing for strength and a bearing material layer, often an aluminum alloy, bonded to it. This construction offers a good balance of load-carrying capacity and conformability for engine applications.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary main bearings required for the engine's crankshaft installation.

Questions? Call Us:631-982-0042

M-F 8AM-4PM ET

Trusted Since 1957

Est. 1957

Specifications

Brand: King Engine Bearings
Part #: MB5578AM0.75
UPC: 611500206139

King Engine Bearings B.M.W 318 (Size +0.75mm) Main Bearing Set

Name: King Engine Bearings B.M.W 318 (Size +0.75mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-b-m-w-318-size-0-75mm-main-bearing-set-t14-770859
Price: 56.14 USD
Availability: BackOrder

$56.14

On Backorder

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

King Engine Bearings Main Bearing Set MB5578AM0.75 for BMW 318. Features a bimetal aluminum base.

Key Features

This is a main bearing set for the BMW 318.
The bearings are sized +0.75mm.
Constructed with a bimetal design and an aluminum base.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This product is a main bearing set from King Engine Bearings, part number MB5578AM0.75. It is designed for the BMW 318 and features a bimetal construction with an aluminum base. These bearings are sized +0.75mm, meaning they are slightly larger than standard to accommodate engine wear or a machined crankshaft.

The bimetal construction is a common and effective design for main bearings, offering good durability and performance. The aluminum base provides a solid foundation for the bearing surface, helping to manage heat and load within the engine's rotating assembly. When rebuilding or repairing an engine, using correctly sized bearings like these is crucial for proper oil clearance and long-term engine health.