What does the 0.25mm undersize mean for these bearings?

The 0.25mm undersize indicates that these bearings are designed for a crankshaft that has been machined down by 0.25mm. This is a common practice during engine rebuilds to ensure proper oil clearance when journals are worn or resurfaced.

What type of engine is this bearing set best suited for?

These bearings feature a lead-free composite material that is ideal for medium-load engines. This means they are designed to handle typical operating conditions without excessive stress.

Are these bearings environmentally friendly?

Yes, these bearings utilize a lead-free composite material, making them an environmentally safe option compared to older bearing technologies that contained lead.

Specifications

Brand: King Engine Bearings
Part #: MB5790SI0.25
UPC: 611500591952

King Engine Bearings Porsche M 48.00/M 48.50 (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Porsche M 48.00/M 48.50 (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-porsche-m-48-00-m-48-50-size-0-25mm-ma-t14-770976
Price: 75.38 USD
Availability: BackOrder

$75.38

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Fits 2003-2006 Porsche Cayenne. King Engine Bearings Main Bearing Set MB5790SI0.25. 0.25mm undersize.

Key Features

Fits 2003-2006 Porsche Cayenne.
Main bearing set from King Engine Bearings.
0.25mm undersize for use with machined crankshafts.
Bi-metal aluminum construction.
Lead-free, environmentally safe composite material.
Ideal for 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

This is a set of main bearings from King Engine Bearings, specifically for the 2003-2006 Porsche Cayenne. Main bearings are crucial components that sit between the crankshaft and the engine block, supporting the crankshaft and allowing it to rotate smoothly. This set is sized at 0.25mm undersize, meaning it's intended for use when the crankshaft journals have been machined down by 0.25mm during an engine rebuild.

King Engine Bearings specializes in this exact type of part, and these bearings are made from a bi-metal aluminum material. They feature a lead-free, environmentally safe composite that's well-suited for medium-load engines like the one in your Cayenne. Using the correct size bearings is essential for maintaining proper oil clearance, which is key to engine longevity and performance.