Fastener Tightening Specifications

Fastener Tightening Specifications





Checking cylinder head for distortion
Max. permissible distortion 0.05 mm

Crankshaft
Axial play new 0.07 to 0.21 mm
Wear limit 0.30 mm

Measure radial clearance with Plastigage
New 0.023 to 0.043 mm
Wear limit 0.07 mm

Do not turn crankshaft when measuring radial play

Main Bearing cap
Tighten 40 Nm plus an additional 1/4 turn (90 degree)

Identification of top crankshaft bearing shells





From the factory, the upper bearing shells are allocated to the cylinder block with the correct thickness. Colored spots serve to identify bearing thicknesses.

The letters marked on lower sealing surface of cylinder block identify which bearing thickness must be installed in which location.

G - Yellow
B - Blue
W - White

Note:
^ - Arrow - points in direction of travel.
^ If color markings can no longer be read, use blue bearing shell.
^ The lower crankshaft bearing shells are always shipped as replacement part with "yellow" color marking.

Connecting rod bolt
Tighten 30 Nm plus an additional 1/4 turn (90 degree)

Piston Ring








Belt pulley/vibration damper
Strength category 12.9:
Tighten 70 Nm

Strength category 10.9:
Tighten 50 Nm plus an additional 1/4 turn (90 degree)