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Cylinder head
Cylinder head
General
The carbon deposits in a diesel engine are small
and therefore the number of operational hours do
not give an indication of when it is time to recondi-
tion a cylinder head. The factors which determine
when reconditioning is necessary are ease of start-
ing the engine and the all round performance.
The cylinder head is made of aluminum and the
head is drilled together with the camshaft cover in
order to localize the camshaft bearing. The cam-
shaft cams lie directly above the valves and affect
them using the valve lifters, which are mounted on
top of the valves. The shims are installed between
the valve lifters and the top of the valves so that ad-
justment is possible.
The cylinder head has two valves per cylinder.
Each valve is installed with a single valve spring.
The valves move in cast valve guides which are
pressed into the cylinder head and can be replaced.
Both the valve stems are equipped with oil seals
which pass over the top of the valve guides.
Valve seat inserts are installed in the cylinder head
for both the inlet and exhaust valves.
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