Cylinder Head Removal - Westerbeke 12C-TWO Operator's Manual

CYLINDER HEAD REMOVAL
1. Remove the engine heat exchanger. If possible, leave one
end of each hose connection attached to the part being
removed. For maintenance, see HEAT EXCHANGER.
2. Remove the starter motor. For starter motor repair, see
STARTER MOTOR
3. Remove the flywheel.
4. Remove the engine backing plate.
5. Unbolt elbows at head and remove the exhaust manifold
in its entirety. See EXHAUST MANIFOLD.
6. Remove the engine alternator and raw water pump.
7. Remove the engine mounted fuel filter and fuel line to
injection pump. (Note the arrangement of sealing wash-
ers on banjo bolts at fuel filter and injection pump.)
8. Remove the thermostat housing and the thermostat.
Leave temperature sending unit in place.
9. Remove the coolant circulating pump.
10. Remove the air intake silencer.
INTAKE MANIFOLD
Now the basic engine is ready for disassembly, cleaning, and
repair if necessary.
1. Remove the high pressure injector line assembly. When
disconnecting each injector line from the injection pump
side delivery valve holder, grasp the holder with a wrench
to prevent it from loosening. After removing the pipe
assembly, plug the nozzle holders and delivery valve
holders to prevent intrusion of dust.
2. Disconnect the glow plug lead wire.
3. Loosen the fresh water pump drive belt and dismount the
belt, idler pulley and bracket.
4. Disconnect the air breather hose.
CYLINDER HEAD REMOVAL
5. Remove the rocker cover.
6. Remove the rocker shaft assembly.
7. Loosen the cylinder head mounting bolts equally and
gradually in the numerical order as illustrated and remove
the cylinder head assembly (including the exhaust mani-
fold).
9
SEQUENCE FOR LOOSENING CYUNDER HEAD BOLTS
SUB !JOLTS
FRONT~
8. Lift the cylinder head off the engine.
9. Remove the cylinder head gasket. Clean the cylinder
head and the cylinder block surface from which the gas-
ket has been removed.
10. Remove the injector assemblies and glow plugs from the
cylinder head.
11. Remove the exhaust manifold from the cylinder head.
12. Remove the valve retainers, valve springs and valves
from the cylinder head. When removing each valve
retainer, depress the retainer against the valve spring and
remove the retainer lock. Identify each valve by putting a
mark indicating the number of the cylinder from which
the valve is removed.
~CAP
13. Remove the valve stem seal. s __ ·
~
~
'.\:,YJ D-RING
HOSE~
I
NIPPLE-----/
ROCKER COVER
GASKET
VALVE SPRING RETAINER
CYLINDER
HEAD
GASKET