Crankshaft Main Bearing: Service and Repair

Main Bearing Shell Allocation

The main bearing shells are allocated to the cylinder block and crankshaft with the correct thickness by the factory. Colored dots serve to identify the bearing thicknesses.

If the cylinder block or crankshaft are being replaced, then the bearing shells must be allocated.

The bearing shells for the cylinder block (upper bearing shell) are always marked with yellow.

Using the letters on the cylinder block and crankshaft, determine the correct color identification for the bearing shell in the bearing cap (lower bearing shell).

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

Cylinder Block Identification:






The letters are located on the oil pan sealing surface.

Crankshaft Identification:






The letters are located on the outer crankshaft counterweight for cylinder 1.

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






Example: