How a car works

All partsBMW M4 CSLS58 engineCrankshaft › Main bearings

Main bearings

Part of Crankshaft · about $210 to replace

What it is

Seven split plain bearings.

What it does

Support the crank in the block on an oil film.

How it fails

Copper showing through means replace.

MaterialTri-metal aluminium/tin on steel backing
SpecClearance 0.03–0.05 mm
Main bearings highlighted on the car

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