What does the +0.75mm sizing mean for these bearings?

The +0.75mm sizing indicates that these bearings are intended for a crankshaft that has been machined down by 0.75mm. This is common during engine rebuilds when the original crankshaft journals have wear and need to be ground to a larger undersize.

What type of material are these bearings made from?

These bearings are constructed from a tri-metal material. This type of material is known for its strength and ability to conform to the crankshaft, helping to maintain oil film and absorb shock loads.

Are these bearings suitable for a stock crankshaft?

No, these bearings are specifically sized at +0.75mm undersize. They are intended for use with a crankshaft that has been machined to this specific undersize, not for a stock, unmachined crankshaft.

Specifications

Brand: King Engine Bearings
Part #: MB5840MC0.75
UPC: 611500629655

King Engine Bearings Chrysler/Dodge Gen Iii Hemi 5.7/6.1/6.4 (Size +0.75mm) Main Bearing Set

Name: King Engine Bearings Chrysler/Dodge Gen Iii Hemi 5.7/6.1/6.4 (Size +0.75mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chrysler-dodge-gen-iii-hemi-5-7-6-1-6--t14-771012
Price: 80.67 USD
Availability: BackOrder

$80.67

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King Engine Bearings Gen III Hemi main bearing set, size +0.75mm. Essential for rebuilding or repairing your 5.7, 6.1, or 6.4 Hemi engine.

Key Features

Main bearing set for Chrysler/Dodge Gen III Hemi 5.7L, 6.1L, and 6.4L engines.
Bearings are sized +0.75mm undersize for use with machined crankshafts.
Constructed with a tri-metal material for durability and oil film retention.
Designed to fit correctly in the engine block's main bearing saddles.

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About this part

Product Details

These King Engine Bearings main bearings are built to a +0.75mm undersize, meaning they are designed for crankshafts that have been machined down by 0.75mm during an engine rebuild. This specific sizing is crucial for ensuring proper oil clearance and bearing function when the original crankshaft journals are no longer within factory specifications. They are intended for Chrysler and Dodge Gen III Hemi engines, covering popular displacements like the 5.7L, 6.1L, and 6.4L.

King Engine Bearings uses a unique tri-metal material construction for these bearings. This well-built material offers a good balance of strength and conformability, which helps to absorb shock loads and maintain oil film integrity under demanding conditions. The precise manufacturing ensures that each bearing fits right into the engine block's main bearing saddles, providing the necessary support for the rotating assembly. Proper installation with the correct oil clearances is key to their performance and longevity.