Crankshaft Main Bearing

Guide Frame Tightening Specifications and Sequence





Replace bolts 1 to 20
Tighten bolts for guide frame as follows:
Tighten bolts 1 to 10 30 Nm
Tighten bolts 11 to 20 20 Nm
Tighten bolts 1 to 10 50 Nm
Tighten bolts 11 to 20 30 Nm
Tighten bolts 1 to 10 an additional 90°
Tighten bolts 11 to 20 an additional 90°
Tighten the bolts for the cylinder block/guide frame sealing surface - highlighted in the illustration but not numbered - in a diagonal sequence to 9 Nm.

Crankshaft Dimensions





Axial Clearance:
Axial clearance 0.090 to 0.251 mm

Radial clearance:
Position the guide frame and tighten it to 30 Nm. Do not turn crankshaft.
New 0.017 to 0.044 mm
Wear limit 0.08 mm

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 item - A -.






Allocation of Main Bearing Shells for Used and Reworked Crankshafts

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.

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.