What does '0.75mm undersize' mean for these bearings?

This means the bearings are manufactured to be 0.75mm smaller in diameter than standard. This is necessary when the crankshaft journals have been ground down (undersized) during an engine rebuild to remove wear or damage. Using the correct undersize bearing restores proper oil clearance.

What is the construction of these main bearings?

These bearings utilize a bimetal construction, featuring an aluminum base. This design helps with heat dissipation and wear resistance, which are critical for engine bearing performance.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary main bearings required for a complete engine rebuild for the specified Audi models.

Specifications

Brand: King Engine Bearings
Part #: MB601AM0.75
UPC: 611500175732

King Engine Bearings Audi Aan/Aar/Aat/Rt/Hy/Ng (Size +0.75mm) Main Bearing Set

Name: King Engine Bearings Audi Aan/Aar/Aat/Rt/Hy/Ng (Size +0.75mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-audi-aan-aar-aat-rt-hy-ng-size-0-75mm--t14-771051
Price: 65.69 USD
Availability: BackOrder

$65.69

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Fits 1979-1981 Audi 5000. King Engine Bearings main bearing set, 0.75mm undersize, for AAN/AAR/AAT/RT/HY/NG engines. Essential for engine rebuilds.

Key Features

Fits 1979-1981 Audi 5000.
Main bearing set for Audi AAN, AAR, AAT, RT, HY, NG engines.
Bearings are 0.75mm undersize, suitable for machined crankshafts.
Features a bimetal construction with an aluminum base.

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About this part

Product Details

If you're rebuilding the engine in your 1979-1981 Audi 5000, getting the main bearings right is crucial for smooth operation and longevity. This main bearing set from King Engine Bearings is specifically made for the AAN, AAR, AAT, RT, HY, and NG engine codes found in those cars.

These bearings are constructed with a bimetal design, using an aluminum base. This construction helps manage heat and wear effectively. This particular set is 0.75mm undersize, which is important if your crankshaft journals have been machined down during a rebuild. Using the correct undersize bearing ensures proper oil clearance and a solid foundation for your engine's rotating assembly.