Crankshaft Main Bearing: Service and Repair

Allocation of the Crankshaft Bearing Shells (classing)

The bearing shells are allocated to the cylinder block with the correct thickness at the factory. Colored spots serve to identify the bearing thicknesses.

The code letters on the lower contact surface or on the top of the cylinder block identify which bearing shell and where it must be mounted on the cylinder block (upper bearing shell).

The code letters on the crankshaft identify which bearing shells and where they must be installed in the bearing cover (lower bearing shell).

The first letter is for bearing cover one, the second for bearing cover two, etc.

Cylinder Block Bearing Shell Identification:






• The cylinder block identification may be located either on the oil pan sealing surface or on the top (transmission side) of the cylinder block.

The identification on the cylinder block is for the upper bearing shell.






- Note the letters and then match it to the color identification in the table.

Bearing Cap Bearing Shell Identification:






The identification on the crankshaft is for the lower bearing shell.

- Note the letters and then match it to the color identification in the table.