Specifications

Service Training
Section 4.9
Page 6
12.05
4.9.1.5 REMOVING AND INSTALLING THE CYLINDER HEAD
REMOVING THE CYLINDER HEAD
- Loosen cylinder head screws uniformly and
gradually in an alternating spiral sequence, as shown
in the diagram.
- Check cylinder head screws, with a ruler (1), for
deformation of the screw shaft (2).
- Check the screw for a visible reduction of thread
size close to the screw shaft (3).
- If the check on the cylinder head screws gives
cause to reject them, deformed or stretched screws
are to be replaced.
INSTALLING THE CYLINDER HEADS
- Clean the sealing face of the cylinder head and engine block. No residue of sealant must remain on the
sealing faces.
- Check cylinder head for distortion.
WARNING The sealing face of the cylinder head must be overhauled in the following cases:
Deformation and distortion of the cylinder head by more than 0.05 mm.
Deep scratches.