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E M · 6 0
Margin
E N G I N E M E CH A N ICAL -
C ylinder Head
(bl Using a caliper gauge, measure ·the bushing bore
diameter of t h e cylinder head.
If
the bushing bore diameter of the cylinder head is more
than
1 4 . 0 1 8
mm
(0. 5 5 1 9
in.l. replace the cylinder head.
(e)
Using S S T and a hammer, tap
in
a new valve guide
bushing to where there is
1 4 . 8 - 1 5 . 2
m m
(0. 5 8 3 -
0 . 5 9 8
i
n
.!
protruding from t h e
cylinder
head.
SST
0 9 2 0 1 ·600 1 1
tdl Using a sharp
9 . 0
mm reamer, ream the valve guide
bushing
10
obtain the standard specified clearance
(See page
EM-59)
between t h e v alve guide bushing
a n d new valve stem.
1 1 .
I N SPECT AND GRIND VALVES
(£II
Grind the valve only enough to remove pits and car
bon
tbl Check thai the valve is ground to the correct valve
face angle.
Valve face angle :
44.5"
(c) C heck t h e valve head margin t h i c k ness.
Standard margin thickness
I n take
1 .4
m m
( 0 . 0 5 5
in.)
E x ha u s t
1 . 8
mm
(0.071
in.)
M inimum m
argin t h ickness:
Intake
0.9
m m
(0.035
in.)
E x haust
1 . 3
rnm
( 0 . 0 6 1
in.)
If
t h e valve head margin t hickness is less t h a n minimum.
replace t h e valve.