Doosan DP158LDF - Cylinder Head; Measurement of Cylinder Liner; Assembly of Cylinder Head; Check of Cylinder Head

10. Cylinder block/head
172
Cylinder head
Measurement of Cylinder Liner
1. Remove the cotter pin pressing the valve spring by
m
eans of a special tool.
DV2213112A_E
2. Remove out the valve stem seal.
3. Remove the intake valve and the exhaust valve.
4. Remove the valve guide from the cylinder head
combustion with the special tool.
DV2213113A
Assembly of Cylinder Head
1. Clean the cylinder head.
2. Apply engine oil on the valve stem and the valv
e
g
uide, and then attach the valve.
3. Replace the new valve stem seal and then attach t
he
st
em seal to the valve guide of the cylinder head with
the special tool.
4. Attach the valve spring washer to valve guide.
5. Put in the inner and outer spring and then attach t
he
valve spring plate on the springs.
6. Attach the valve cotter with the valve spring compre
ss
to
ol.
7. Check if the valve cotters have been positione
d
cor
rectly with the plastic hammer after completing
attaching them.
DV2213114A
Check of Cylinder Head
1. Checking cylinder head
1) Check cracks or damage of the cylinder head.
2) Remove carbon from the bottom surface of t
he
cyl
inder head. Here, be careful not to scratch the
valve seat surface.
CAUTION
Be careful not to damage the cylinder gasket.
Valve Spring
Compression Tool
CAUTION
Be careful not to damage the valve stem seal.
CAUTION
The yellow mark on the valve spring is upward.
CAUTION
Be careful not to scratch the valve seat surface.