Crankshaft Main Bearing

Crankshaft Main Bearing Guide Frame Fasteners





Replace bolts
First step: Bolts 1 through 10 30 Nm
Second step: Bolts 11 through 20 20 Nm
Third step: Bolts 1 through 10 50 Nm
Fourth step: Bolts 11 through 20 30 Nm
Fifth step: Bolts 1 through 20 Tighten 90° further
Sixth step: Sealing surface bolts highlighted in dark 9 Nm in a diagonal sequence

Crankshaft Dimensions





Main Bearing Shells, New Crankshaft, 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 the Crankshaft Bearing Shells for the Guide Frame - Version 1





Bearing shells with the correct thickness are allocated to the guide frame in the factory. Colored dots on the sides of the 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 the Crankshaft Bearing Shells for the Guide Frame - Version 2





Bearing shells with the correct thickness are allocated to the guide frame in the factory. Colored dots on the sides of the 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 Shells, 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

With used and reworked crankshafts, the main crankshaft journals must be measured to allocate the appropriate bearing shells

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





Allocation of Crankshaft Bearing Shells for Guide Frame

With used and reworked crankshafts, the main crankshaft journals must be measured to allocate the appropriate bearing shells

Any other markings on the crankshaft are invalid when reworking a crankshaft

Allocate bearing shells to the diameter of the main crankshaft pivot pins using the following table