Name: ACL BMW N63B44/S63B44 4.4L V8 .50mm Oversized Main Bearings
Brand: ACL
Price: 266.87 USD
Availability: InStock

Question 1

What does it mean to have oversized bearings?

Accepted Answer

When a block is align bored or honed, material is removed from the main bearing bores. This increases the bore diameter, which requires the use of oversized bearings to maintain the correct bearing clearance. Using standard-size bearings in an align-bored block will result in excessive bearing clearance, which can lead to engine damage.

Question 2

How do I know if I need oversized bearings?

Accepted Answer

If you have had your engine block align bored or honed, you will need oversized bearings. Consult with your machinist to determine the correct amount of oversize needed. They will be able to measure the main bearing bore diameter and recommend the appropriate bearing size.

Question 3

What is the correct bearing clearance for my engine?

Accepted Answer

Refer to the manufacturer's specifications for the correct main bearing clearance for your engine. This information can be found in the factory service manual. Proper bearing clearance is critical for engine longevity, so it's important to get it right.

ACL BMW N63B44/S63B44 4.4L V8 .50mm Oversized Main Bearings

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