Figure 11B-32. Minimum Distance
Between Top and Bottom of Cylinder
Head
6. Check the water hole nozzles to be
sure they are not loose. If necessary,
r e p l a c e the nozzles as follows:
Figure 11B-33. Correct Installation
o f Water Nozzles
A . R e m o v e the old nozzles
9. Inspect all other components removed
B. Make sure the water inlet ports in the
from the cylinder head.
cylinder head are clean and free of
scale. The water holes at each end of
If a service replace cylinder head is to
the head may be cleaned up with a
be installed, it must be thoroughly cle-
1/2" drill and the intermediate holes
aned of all rust preventative compound,
may be cleaned up with a 13/16" drill.
particularly inside the integral fuel mani-
Break the edges of the holes slightly.
folds, before installing the plugs. A
simple method of removing the rust pre-
C. For the positioning of the nozzles, re-
ventative compound is to immerse the
fer to Figure 11B-33. Press the noz-
h e a d in a mineral spirits based solvent or
zles flush to 0.0312" recessed below
fuel oil, then scrub the head and go
the surface of the cylinder head.
through all of the openings with a soft
bristle brush. A suitable brush for cle-
D. C h e c k t o m a k e s u r e t h e n o z z l e s f i t
aning the various passages in the head
tight. If necessary, use a wood plug
can be made by attaching a 1/8" diameter
or other suitable tool to expand the
brass rod to brush J 8152. After clean-
nozzles, o r t i n t h e o u t s i d e d i a m e t e r
ing,
dry
the
cylinder
head
with
with solder to provide a tight fit. If
compressed air.
solder is used, make sure the orifices
i n the nozzles are not closed with sol-
A service replacement cylinder head in-
der.
cludes the exhaust valve guides, valve
seat inserts, water nozzles, injector
7. R e p l a c e b r o k e n o r d a m a g e d s t u d s .
p i l o t sleeves,
bridge guides,
tubes,
Apply sealant to the threads of new
valve spring seats and the necessary
studs and drive them to 10-25 lb-ft
plugs. In addition, studs, cover plates,
(14-34 Nm) torque (water manifold cover
gaskets, lockwashers and nuts are pro-
studs) or to 25-40 lb-ft (34-54 Nm) tor-
vided to seal the water outlet openings
que (exhaust manifold studs).
that are not required on certain engines.
A length of flexible fuel hose and fittings
are also included where required.
8. Pilot sleeves have been added to the
head mounting bolt holes at each end of
the four-valve cylinder heads. Make
Injector clamp bolts or studs are not in-
sure the sleeves are flush or recessed
cluded and it is necessary to use new
parts or transfer the old parts to the
below the fire deck of the cylinder head.
new head. Injector clamp bolts are in-
Replace damaged sleeves. The sleeves,
terchangeable with the former studs and
w h i c h act. as a hollow dowel and the cyl-
nuts; the special washer is used with ei-
inder head, help to guide the head in
ther the bolt or stud.
place without disturbing the seals and
gaskets.
Engine (Less Major Assemblies)
