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

The +0.50mm sizing indicates that these bearings are slightly larger than standard size. This is common when rebuilding an engine, especially if the crankshaft journals have been machined undersize. It allows you to achieve the correct oil clearance specified by the manufacturer.

What is the advantage of the lead-free composite material?

The lead-free composite material is an environmentally safer option compared to older bearing technologies. It's designed to perform well in low to medium-load engine applications, providing reliable performance without hazardous lead content.

Do these bearings come with installation instructions?

While these bearings are a direct fit for compatible engines, specific installation procedures should be followed from your vehicle's factory service manual. This ensures proper torque specifications and oil clearances are met for optimal engine performance and longevity.

Specifications

Brand: King Engine Bearings
Part #: MB7039AM0.5
UPC: 611500387487

King Engine Bearings B.M.W/Opel M 51/M 57/D 25/Y 25 Td (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings B.M.W/Opel M 51/M 57/D 25/Y 25 Td (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-b-m-w-opel-m-51-m-57-d-25-y-25-td-size-t14-771078
Price: 130.46 USD
Availability: BackOrder

$130.46

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King Engine Bearings main bearing set for BMW/Opel M 51, M 57, D 25, Y 25 TD engines. Size +0.50mm.

Key Features

Fits 1998-2000 BMW 323Ci, 1996-2000 BMW 328i, and many other BMW/Opel models.
Main bearing set sized at +0.50mm for engine rebuilding.
Constructed from bi-metal aluminum material.
Features a lead-free, environmentally safe composite.
Ideal for low to medium-load engines.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're rebuilding the bottom end of your BMW or Opel engine, getting the right main bearings is crucial for smooth operation and longevity. This set from King Engine Bearings is specifically made for models like the M 51, M 57, D 25, and Y 25 TD, and it's sized at +0.50mm to help you achieve proper clearances during your rebuild.

King has been specializing in bearings since 1960, focusing on producing a well-built product. These main bearings are constructed from a bi-metal aluminum material and feature a lead-free composite, making them suitable for low to medium-load engines. This updated material is environmentally safe and helps ensure consistent performance for your engine build.

This set is designed to fit a range of BMW and Opel vehicles, including popular models like the 325i, 525i, and Z3. Make sure to verify fitment for your specific year and model. Proper installation is key, so refer to your vehicle's service manual for detailed instructions on bearing replacement.