Main Bearing Size Codes

Main Bearing Shells, New Crankshafts, Allocating

Allocation of crankshaft bearing shells for cylinder block





• Bearing shells with the correct thickness are allocated to the cylinder block in the factory. Colored dots on sides of bearing shells serve for identifying bearing shell thickness.

• Allocation of bearing shells to cylinder block is marked by one letter each at front left on cylinder block (can be read from outside) as shown in the illustration.





• In addition, the letters are also stamped on the guide frame.

Allocation of crankshaft bearing shells for guide frame - Version I





• Bearing shells with the correct thickness are allocated to the guide frame in the factory. Colored dots on sides of bearing shells serve for identifying bearing shell thickness.

• Allocation of bearing shells to guide frame is marked by one colored dot each on crankshaft counterweight as shown in the illustration.





Allocation of crankshaft bearing shells for guide frame - Version II





• Bearing shells with the correct thickness are allocated to the guide frame in the factory. Colored dots on sides of bearing shells serve for identifying bearing shell thickness.

• The allocation of bearing shells to guide frame is identified by a letter on the front crankshaft counterweight, as shown in the illustration. The "X" marks the end of the letter sequence and is near the bearing 1 color identification on the belt pulley side.

• Ignore - A -.






Main Bearing Shears, Used and Reworked Crankshafts, Allocating

Allocation of crankshaft bearing shells for cylinder block





• Bearing shells are allocated to cylinder block corresponding to color markings stamped into cylinder block.

• For used and reworked crankshafts, the main crankshaft journals must be measured in order to allocate the matching bearing shells.

• Crankshaft dimensions. Refer to => [ Crankshaft Dimensions ] [1][2]Crankshaft, Engine.

• Thicker over-sized bearing shells are available for reworked crankshafts. These have the same color markings as the original-size bearing shells.





Allocation of crankshaft bearing shells for guide frame

• For used and reworked crankshafts, the main crankshaft journals must be measured in order to allocate the matching bearing shells.

• Any other markings on the crankshaft are invalid when reworking crankshafts.

• Allocate bearing shells to the determined diameter of main crankshaft journals according to the following table.