Crankshaft Main Bearing: Service and Repair

Main Bearing Shell, Allocating

From the factory, the upper bearing shells are allocated to the cylinder block with the correct thickness. Colored dots serve to identify the bearing thicknesses.

The letters marked on the lower sealing surface of the cylinder block identify which bearing thickness must be installed in which location.

G Yellow
B Blue
W White

Crankshaft/Upper Bearing Shell Mark





• The - arrow - points in the direction of travel.

• If the colored marks can no longer be read, use the bearing shell with the "blue" mark.

• The lower crankshaft bearing shells are always shipped as a replacement part with the "yellow" mark.