Cylinder Head
3---1
3. CYLINDER HEAD
A. Removing cylinder head
1. Clean the engine externally and drain the coolant. Discon-
nect the coolant hoses from the cylinder head and the ther-
mostat housing.
2. Remove the suction hoses between the turbocharger and
the air filter and between the turbocharger and the intake
manifold.
3. Disconnect the turbocharger pressure and return oil pipes.
4. Remove the pipes to the thermostart fuel reservoir.
5. Remove the injector leak---off fuel pipes and the delivery
pipes. Remove the injectors. Fit blanking---off caps on all
open connections.
6. Remove the intake and exhaust manifolds and the thermo-
stat housing.
Note!
It is possible to remove the cylinder head even thought
these parts are attached to the head.
7. Remove the valve cover and the breather hose.
8. Remove the rocker arm mechanism and the push rods.
9. Loosen all the cylinder head bolts first by a 1/4 turn and
then remove them. Remove the cylinder head.
B. Removing valves
Ensure that valves which are to be re---used are marked, so
that they are fitted in their original locations.
9052 47200
43--- 1
9101 66200
1. Install the counter screw 9052 47200 for the valve spring
installing tool in the rocker arm cover bolt. For the valves in the
middle, use a bolt of suitable length.
2. Compress the valve springs using lever 9101 66200. Re-
move the valve cotters, spring guide and spring. Remove the
valves.
C. Checking cylinder head
1. Remove the soot from the exhaust ports, clean the sealing
surfaces and wash the cylinder head.
2. Check for cracks and other damage.
43--- 2
3. Check the flatness of the cylinder head by using a straight
edge. An uneven or warped surface should be surface
ground. The height of the cylinder head, after grinding,
should not be less than
104,00 mm
. The valve disc depth
from the cylinder head surface should be
0,60 mm
for the
exhaust valves and
0,70 mm
for the inlet valves.
9101 66000
43--- 3
4. Straighten and clean the injector location seat in the cylin-
der head with cutter 9101 66000.
