What is the main job of engine main bearings?

Main bearings sit between the crankshaft and the engine block. Their primary role is to support the crankshaft, allowing it to rotate smoothly while maintaining precise oil clearance. They handle the significant loads generated during engine operation.

Are these bearings a direct replacement for the factory ones?

Yes, these ACL main bearings are designed as a standard size replacement for the original equipment in your 2006-2010 BMW M5. They are intended to fit into the factory main caps.

What should I do before installing these bearings?

Before installing any new main bearings, it's crucial to have your crankshaft professionally measured and inspected for straightness and surface finish. This ensures the bearings will perform correctly and last as long as possible.

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Specifications

Brand: ACL
Part #: 6M1581H-STD
UPC: 9315726469828

ACL BMW S85B50 5.0L V10 Standard Size Main Bearings

Name: ACL BMW S85B50 5.0L V10 Standard Size Main Bearings
Brand: ACL
SKU: acl-acl-bmw-s85b50-5-0l-v10-standard-size-main-bearings-t14-719912
Price: 361.97 USD
Availability: BackOrder

$361.97

On Backorder

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

Fits 2006-2010 BMW M5. ACL standard size main bearings for the S85B50 5.0L V10 engine.

Key Features

Fits 2006-2010 BMW M5.
Standard size main bearings for the S85B50 5.0L V10 engine.
Well-built by ACL, a reputable engine bearing manufacturer.
Designed to provide proper crankshaft support and oil clearance.

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About this part

Product Details

Doing an engine rebuild on your 2006-2010 BMW M5? If you're digging into the S85B50 V10, you'll want to make sure the crankshaft is supported by solid main bearings. These standard-size main bearings from ACL are built to handle the demands of that high-revving engine.

ACL has been making engine bearings for a long time, and these are well-built for the job. They're made to the correct specifications to ensure proper oil clearance and support for the crankshaft. When you're putting an engine like the S85 back together, using reliable bearings is key to a long-lasting build. These fit right into the factory main caps, making installation straightforward as part of a larger engine overhaul.

When you're doing this kind of work, it's always a good idea to have your crankshaft professionally measured and inspected. These bearings are designed to be a direct replacement for the original equipment, so you can be confident in their fit and function.