torque wrench to tighten the bolts to the
specified torque.
Other conditions which may eventually
result in cylinder head cracks are:
1. Excess fuel in the cylinders caused by
leaking injectors.
2. Slipping fan belts can cause overheat-
ing by reducing air flow through the ra-
diator.
3. Accumulation of dirt on the radiator
Figure 11B-27. Four Valve Cylinder
core which will reduce the flow of air and
Head
slow the transfer of heat from the coolant
to the air.
6. Remove the thermostat housing assem-
bly.
4. Inoperative radiator cap which will re-
s u l t in loss of coolant.
7. Remove the water manifold.
8. Clean and remove the valve rocker
cover and the governor cover.
Remove Cylinder Head
9. Disconnect the fuel rod from the injec-
Certain service operations on the engine
tor control tube lever and the governor.
require removal of the cylinder head:
Remove the fuel rod.
10. Remove the injector control tube and
1 . Remove and install pistons.
brackets
as
an
assembly
(see
F i g u r e 11B-28 on page 11B-18.
2. Remove and install cylinder liners.
3. Remove and install exhaust valves.
11. If the cylinder head is to be disas-
sembled for reconditioning of the exhaust
4. Remove and install exhaust valve
valves and valve seat inserts or for a
guides.
complete overhaul, remove the fuel pipes
a n d injectors at this time (see Subsection
5. Recondition exhaust valves and valve
11C).
seat inserts.
12. Loosen (three or four turns) the two
6. Replace fuel injector tubes.
bolts directly below each lifter bracket
which attach the balance weight cover
7. Install new cylinder head gaskets and
and flywheel housing to the front and
seals.
rear end plates. Otherwise, the thread-
ed ends of the bolts may interfere with
Refer to Figure 11B-24 on page 11B-16
removal of the cylinder head.
and remove the cylinder head as follows:
13. Remove the two bolts which secure
1 . Drain the cooling system.
the front lifter bracket to the balance
weight cover and the two bolts attaching
2. Disconnect the exhaust piping at the
the rear lifter bracket to the flywheel
exhaust
manifold.
Remove the con-
housing.
n e c t i o n s from the exhaust manifold to the
turbocharger.
Remove
the
14. Check the torque on the cylinder
turbocharger, if necessary.
head bolts and stud nuts before remov-
ing the head. Then remove the bolts
3. Remove the air cleaner and the air in-
and nuts and, using lifting hooks and a
let housing.
chain hoist, lift the cylinder head from
the cylinder block. Checking the torque
4 . Remove the exhaust manifold.
before removing the head bolts and exam-
ining the condition of the compression
gaskets and seals after the head is re-
5. Disconnect the fuel lines at the cylin-
der head and remove the fuel filter.
11B-17
Engine (Less Major Assemblies)