Piston and Cylinder Specifications

Cylinder Bores





Deviation from nominal size max. 0.08 mm

Main Bearing Cap Bolts 40 Nm plus an additional 1/4 turn (90°)
Replace

Crankshaft
Axial play
New 0.07 to 0.21 mm
Wear limit 0.30 mm
Radial clearance
New 0.023 to 0.043 mm
Wear limit 0.07 mm

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.

Crankshaft Dimensions
(Dimensions in mm)

Crankshaft dimensions:

Connecting Rod Bearing Shell
Axial play
New 0.10 to 0.35 mm
Wear limit 0.4 mm
Radial clearance
New 0.02 to 0.06 mm
Wear limit 0.09 mm

Piston Ring Gaps





Ring to Groove Clearance





Piston Inspection





Take measurement approx. 10 mm from lower edge of piston skirt and offset 90° to piston axis.

Deviations from nominal dimension max. 0.04 mm

Piston and Cylinder Dimensions

Note: Cylinder bore must not be measured if cylinder block is secured to engine stand with Engine Lateral Bracket T03001, or else results may be incorrect.

Piston and cylinder dimensions:

* Measurement does not include graphite coating (thickness = 0.02 mm). The graphite coating wears off.

Belt Pulley/Vibration Damper Bolts
Replace
Strength category 12.9 70 Nm
Strength category 10.9 50 Nm plus an additional 1/4 turn (90°)