What does the '+0.5' size designation mean for these bearings?

The '+0.5' indicates that these bearings are 0.5mm larger in diameter than standard size. This is typically used when the crankshaft journals have been machined down by 0.5mm during an engine rebuild to remove wear or damage.

What is the advantage of a bimetal bearing with an aluminum base?

Bimetal bearings, especially those with an aluminum base, offer a good balance of strength and conformability. The aluminum provides excellent load-carrying capacity and wear resistance, while the overall construction helps dissipate heat effectively.

Do these bearings come with installation instructions?

While specific installation instructions are not included, it is recommended to refer to the manufacturer's service manual for your specific BMW model. Proper installation involves ensuring crankshaft journal cleanliness, correct oil clearance measurement, and adherence to torque specifications.

King Engine Bearings Main Bearing Set MB770AM0.5 - BMW M30

Name: King Engine Bearings BMW M30B35/25/28/32/33/35 Main Bearing Set (Size +0.5)
Brand: King Engine Bearings
Price: 96.78 USD
Availability: InStock

King Engine Bearings BMW M30B35/25/28/32/33/35 Main Bearing Set (Size +0.5)

$96.78

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King Engine Bearings main bearing set for BMW M30 engines. Size +0.5. Fits a wide range of BMW models.

Key Features

Fits various BMW M30 engine models.
Main bearing set with a +0.5mm undersize.
Features a bimetal construction with an aluminum base.
Designed for reliable engine bottom-end performance.

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Will this fit your vehicle?

Product Details

If you're rebuilding the bottom end of your BMW M30 engine, getting the main bearings right is crucial for smooth operation and longevity. This main bearing set from King Engine Bearings is built with a bimetal construction, featuring an aluminum base for good load-carrying capacity and wear resistance. These bearings are specifically sized at +0.5mm, which is important if your crankshaft journals have been machined to this size during a rebuild.

King Engine Bearings is a well-known name in the performance and racing world, and their bearings are made to handle the demands of an engine. The bimetal construction helps dissipate heat effectively and offers a solid foundation for your engine's rotating assembly. This set is designed to fit a variety of BMW models equipped with the M30 engine, including popular choices like the 535i, 635CSi, and 735i, among many others.

When installing these bearings, always ensure your crankshaft journals are clean and within the specified tolerance for the +0.5mm size. It's also a good practice to check the oil clearance with Plastigage to confirm everything is within spec before final assembly. This set is a solid option for anyone looking to restore or rebuild their M30 engine with reliable components.