What is the difference between standard and undersize bearings?

Standard bearings are meant for a crankshaft that is still at its original factory size. If the crankshaft has been machined down due to wear or damage, you would need an undersize bearing set to maintain the correct oil clearance.

Do these bearings come with assembly lubricant?

This ACL main bearing set does not include assembly lubricant. It is crucial to use a high-quality engine assembly lube on the bearings and crankshaft journals before installation to ensure proper lubrication during initial startup.

What other engine components might need attention when replacing main bearings?

When replacing main bearings, it's a good time to inspect the crankshaft for wear or damage. You should also consider replacing rod bearings, piston rings, and engine seals to ensure the entire engine is in good condition.

Specifications

Brand: ACL
Part #: 5M1538H-STD
UPC: 9315726432853

ACL BMW M40B16/18 (1.6L / 1.8L / 1.9L) Standard Main Bearing Set

Name: ACL BMW M40B16/18 (1.6L / 1.8L / 1.9L) Standard Main Bearing Set
Brand: ACL
SKU: acl-acl-bmw-m40b16-18-1-6l-1-8l-1-9l-standard-main-bearing-set-t14-361899
Price: 231.46 USD
Availability: BackOrder

$231.46

On Backorder

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

Key Features

Fits 1996-1998 BMW 318i, 1996-1997 318is, 1996-1999 318ti, and 1996-1998 BMW Z3.
Designed for BMW M40B16, M40B18, and M40B19 engines (1.6L / 1.8L / 1.9L).
Standard size bearings for use with a factory-spec or undamaged crankshaft.
Helps restore proper oil clearance and lubrication within the engine.
Well-built to meet original equipment specifications.

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About this part

Product Details

ACL has been making engine bearings for a long time, and this set is made to meet the original specifications for your engine. They are designed to provide the correct oil clearance between the crankshaft and the engine block, which is crucial for proper lubrication and preventing metal-on-metal contact. This set includes standard-sized bearings, meaning they are intended for use with an undamaged, factory-spec crankshaft. If your crankshaft has been previously machined or is out of round, you would need to look into an undersize bearing set.

This set is specifically designed to fit the 1996-1998 BMW 318i, 1996-1997 318is, 1996-1999 318ti, and 1996-1998 BMW Z3 models equipped with the M40 engine. Proper installation is key, and it's recommended to consult your vehicle's service manual for the correct procedures, including torque specifications and assembly lubrication.