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CYLINDER HEAD / VALVES
VALVE GUIDE REPLACEMENT
Do
not use a
torch
to heat the cylinder
head
; it
may
cause
warping
.
Chill the replacement valve guides in the freezer
section
of
a refrigerator
for
about an hour .
Heat the cylinder head
to 100
-
150 ° C ( 212
-
302 ° F )
with a hot plate or oven .
To avoid burns
,
wear heavy gloves when handling the
heated cylinder head .
Support the cylinder head and drive out the valve
guides
from
combustion chamber side
of the cylinder
head .
TOOL
;
[ 1 ]
Valve guide driver
07942 - 8920000
USA Only :
Mark all
of
the guides with a sharpie
at
the specified
height
. Place
them
in
a freezer for at least 1 hour
. Heat
the cylinder head to the specified temp
.
Drive the guides in
to the line
and check with a pair
of
calipers
.
[ 1
]
Use cutting oil on
the reamer during
this operation
.
Drive in the valve guides to the specified depth from the
top of the cylinder head
.
SPECIFIED DEPTH :
IN : 17.7
- 18.0 mm ( 0.70
-
0.71 in )
EX : 19.6
- 19.9 mm ( 0.77 - 0.78
in )
TOOL :
[ 1 ] Valve guide driver
07743
-
0020000
( Not available in
U . S . A
.
)
Let the cylinder head cool
to
room temperature .
Ream new valve guides
after installation .
Insert the
reamer
[
1 ]
from
the combustion chamber side
of the
cylinder head and always rotate the reamer
clockwise .
TOOL :
Valve guide reamer , 5.010 mm
07984 - MA 60001 or
07984 - MA 6000 D
( U . S . A . only )
Clean the cylinder head
thoroughly
to
remove any
metal particles
.
Reface the valve seat ( page 10
-
18 ) .
VALVE SEAT INSPECTION /REFACING
D
o
oo
y
Clean the intake
and exhaust valves thoroughly
to
remove carbon deposits
.
Apply a light coating of
Prussian Blue
to the
valve
seats
.
Tap
the valves and seats using a rubber hose or other
hand
-
lapping tool [ 1 ]
,
m
Q
o
i
)
)
)
J
i
10
- 18
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Table of Contents
Troubleshooting
