What does the 0.040 inch undersize mean for these bearings?

The 0.040 inch undersize specification means these bearings are designed to be used with a crankshaft that has been machined down by 0.040 inches. This is common during engine rebuilds to achieve proper oil clearance.

What is the primary function of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They create a low-friction surface for the crankshaft to rotate on and maintain the critical oil clearance needed for lubrication.

Are these bearings sold individually or as a set?

This product is a Main Bearing Set, meaning it includes all the necessary main bearings for the specified Porsche M48.51 and M48.01 engines.

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Specifications

Brand: King Engine Bearings
Part #: MB5826SI
UPC: 611500600043

King Engine Bearings Main Bearing Set Porsche M48.51 M48.01

Name: King Engine Bearings Main Bearing Set Porsche M48.51 M48.01
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-main-bearing-set-porsche-m48-51-m48-01-t14-799992
Price: 132.85 USD
Availability: BackOrder

$132.85

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King Engine Bearings Main Bearing Set MB5826SI for Porsche M48.51 M48.01 engines. Features 0.040 inch undersize sizing.

Key Features

Main bearing set for Porsche M48.51 and M48.01 engines.
Features 0.040 inch undersize sizing for crankshaft applications.
Well-built by King Engine Bearings for reliable performance.
Designed to ensure proper crankshaft rotation and oil clearance.

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About this part

Product Details

If you're rebuilding the bottom end of a Porsche M48.51 or M48.01 engine, getting the main bearings right is crucial for long-term reliability. King Engine Bearings offers this Main Bearing Set, part number MB5826SI, specifically for these applications. These bearings are a key component in ensuring your crankshaft spins smoothly and with the correct clearances.

This set is manufactured to King's high standards, ensuring a well-built part that can handle the demands of a performance engine. The MB5826SI set comes with a 0.040 inch undersize specification, which is important to note if you are machining your crankshaft. Using the correct undersize bearing ensures that your engine builder can achieve the precise oil clearance needed for optimal lubrication and reduced friction.