F i g u r e 11B-29. Cylinder Head Holding
Plates-J 3087-01
in this subsection for removal of the ex-
haust valve and injector operating mech-
anism.
C l e a n Cylinder Head
Figure 11B-28. Removing or
After the cylinder head has been disas-
Installing Injector Control Tube
sembled and all of the plugs (except cup
plugs) have removed, thoroughly steam
moved may reveal the causes of any
clean the head. If the water passages
cylinder head problems.
a r e heavily coated with scale, remove the
injector tubes and water nozzles. Then
NOTE
clean the cylinder head in the same man-
ner as outlined for cleaning the cylinder
When placing the cylinder head as-
block.
sembly on a bench, protect the
cam followers and injector spray
Clean all of the cylinder head components
tips, if the injectors were not re-
with fuel oil and dry them with com-
moved, b y r e s t i n g t h e v a l v e s i d e
pressed air.
of
the
head
on
2"
thick
wood
blocks.
I n s p e c t Cylinder Head
15. Place the cylinder head on its side
1. Before a cylinder can be reused, it
and remove the engine lift brackets and
must be inspected for cracks. Five pre-
gaskets. Then attach the cylinder head
scribed methods for checking a cylinder
holding plates J 3087-01 to raise the head
head for cracks are as follows:
above
the
work
bench
(see
NOTE
16. Remove and discard the cylinder
If any method reveals cracks, the
head compression gaskets, oil seals and
c y l i n d e r head should be considered
w a t e r seals.
unacceptable for reuse.
17. After the cylinder head has been re-
moved, drain the lubricating oil from the
MAGNETIC PARTICLE METHOD. The cyl-
engine. Draining the oil at this time will
inder head is magnetized and then cov-
r e m o v e any coolant that may have worked
ered with a fine magnetic powder or
i t s way to the oil pan when the head was
solution. Flaws such as cracks, form a
removed.
small local magnet which cause the mag-
netic particles in the powder or solution
to gather there, effectively marking the
D i s a s s e m b l e Cylinder Head
crack. The cylinder head must be de-
m a g n e t i z e d after the test.
If complete disassembly of the cylinder is
necessary refer to the information later
11B-18