11A
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39
TOP AND FRONT OF ENGINE
Cylinder head gasket
L90, and K7M, and 710
11A
I -CLEANING THE CYLINDER HEAD
Clean the cylinder head.
II - CHECKING THE GASKET FACE
With a ruler and shim set, check for gasket face bow.
The maximum deformation is 0.05 mm.
Test the cylinder head for any cracks using the cy-
linder head testing tool (see Garage Equipment
Catalogue).
Refer to Technical Note 6010A for the cylinder head
stripping down procedure.
REFITTING
Bring the pistons to mid-stroke position to prevent
them from coming into contact with the valves during
the tightening of the cylinder head.
Fit the cylinder head with a new gasket.
Tightening the cylinder head:
- Pretighten in order and to torque the cylinder head
mounting bolts (2 daNm),
- Check that all the cylinder head mounting bolts
are properly tightened to 2 daNm,
- angle tighten in order the cylinder head mounting
bolts (220˚
±±±±
10).
IMPORTANT
- Do not scratch the aluminium sealing surfaces.
- Wear goggles.
- Wear gloves during the operation.
- Clean the gasket faces with DECAPJOINT to
dissolve any seals which are still cemented.
- Apply the product to the section to be cleaned;
Wait approximately ten minutes, then remove
the residue using a wooden spatula.
WARNING
Do not allow this product to drip onto the pain-
twork.
Clean the cylinder head carefully to prevent
foreign bodies from entering the oil inlet and
return pipes.
Failure to follow this advice could lead to the bloc-
king of the various oil inlet ducts, which would
quickly result in engine damage.
WARNING
All cylinder head bolts must always be changed
after removal.
WARNING
No regrinding of the cylinder head is permitted.
WARNING
In order to ensure that the bolts are correctly tigh-
tened, use a syringe to remove any oil which may
be in the cylinder head mounting holes.
WARNING
Be sure to replace all seals that have been remo-
ved.
107772
WARNING
Do not retighten the cylinder head bolts after
applying this procedure.
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