What does the +0.50mm sizing mean for these bearings?

The +0.50mm sizing indicates that these bearings are slightly larger than standard. This is typically used when the engine's crankshaft has been machined down by 0.50mm to remove wear or damage. Using the correct size bearing is crucial for maintaining proper oil clearance.

What is the material of these main bearings?

These main bearings are made with a bimetal construction, featuring an aluminum base. This material is chosen for its good bearing properties, including its ability to conform to the crankshaft and manage heat.

Are these bearings a direct replacement for all M30 engines?

These bearings are specifically designed for BMW M30 engines and are sized at +0.50mm. Always confirm your engine's specific requirements and crankshaft machining status before ordering to ensure proper fitment and function.

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King Engine Bearings BMW M30B35/25/28/32/33/35 (Size +0.50mm) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB770AM1.5
UPC: 611500180828

King Engine Bearings BMW M30B35/25/28/32/33/35 (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings BMW M30B35/25/28/32/33/35 (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
Price: 96.78 USD
Availability: InStock

$96.78

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King Engine Bearings main bearing set for BMW M30 engines. Size +0.50mm. Engine Bearing

Key Features

Fits 1968-1993 BMW M30 engines.
Main bearing set is sized +0.50mm.
Constructed with a bimetal (aluminum base) material.
Designed for BMW M30B35, M30B25, M30B28, M30B32, M30B33, and M30B35 engine codes.

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Product Details

King Engine Bearings is known for making well-built engine components, and this main bearing set is no exception. If you're rebuilding the bottom end of your BMW M30 engine, these bearings are designed to handle the demands of the job. They are a bimetal type, meaning they have an aluminum base, which is a common and effective material for main bearings.

This particular set is sized at +0.50mm, which is important to note if you've had your crankshaft machined. Using the correct undersize or oversize bearings is critical for proper oil clearance and engine longevity. King uses advanced materials and manufacturing processes to ensure these bearings offer solid performance for your M30 engine, covering a wide range of BMW models like the 535i, 735i, and 635CSi.