What does the '0.75' size designation mean for these bearings?

The '0.75' in the part number indicates that these are 0.75 undersize bearings. This means they are designed for use when the crankshaft has been machined down by 0.00075 inches to correct wear or damage.

Are these bearings sold individually or as a set?

This is a crankshaft main bearing set, meaning it includes all the necessary main bearings required for a complete engine installation.

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 that allows the crankshaft to rotate smoothly while withstanding the significant forces from the pistons and connecting rods.

Specifications

Brand: King Engine Bearings
Part #: MB4521AM0.75
UPC: 611500590429

King Engine Bearings Mercedes Benz M 272.911 / M 272.920 (Size 0.75) Crankshaft Main Bearing Set

Name: King Engine Bearings Mercedes Benz M 272.911 / M 272.920 (Size 0.75) Crankshaft Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-mercedes-benz-m-272-911-m-272-920-size-t14-693871
Price: 38.60 USD
Availability: BackOrder

$38.60

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King Engine Bearings crankshaft main bearing set for Mercedes Benz M 272.911 / M 272.920 engines. Size 0.75.

Key Features

This is a 0.75 undersize crankshaft main bearing set.
Designed for Mercedes Benz M 272.911 and M 272.920 engines.
Supports the crankshaft within the engine block.
Allows for proper oil clearance during engine operation.

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About this part

Product Details

This is a King Engine Bearings crankshaft main bearing set, specifically sized at 0.75 undersize for Mercedes Benz M 272.911 and M 272.920 engines. Main bearings are crucial for supporting the crankshaft within the engine block, allowing it to spin smoothly while handling the immense forces generated during combustion. When rebuilding or repairing an engine, especially if the crankshaft has been machined undersize, using the correct size bearings is essential for proper oil clearance and engine longevity.

King Engine Bearings is known for producing well-built engine components. This set is designed to meet the specific requirements of the M 272 engine family, ensuring it fits right and performs as expected. The 0.75 undersize means these bearings are intended for use with a crankshaft that has been ground down by 0.00075 inches to correct wear or out-of-round conditions. Proper installation with the correct oil clearances is key to achieving the expected performance and durability from these bearings.