Toyota 2H Repair Manual page 69

E N G I N E M E C H A N I C A L - Cylinder
/ ,1
g a s k e t
8. C L E A N V A L V E S
(a) Use a scraper. chip any c a r b o n f r o m t h e v a l v e
a
head.
Ib) U s i n g wire brush. thoroughly clean t h e valve
( e )
9 . I N S PECT VALVE STEM AND VALVE G U I D E B U S H I N G
U s i n g a c a l i p e r g a u g e o r telesco p i n g g a u g e . measure
the inside d i a m e t e r of t h e valve g u i d e b u s h i n g .
B u s h i n g i n s i d e
d ia m e t e r :
9 . 0 \ 0 - 9.030 m m (0.3547 - 0 . 3 5 5 5 i n J
U s i n g a micrometer. measure t h e d i a m e ter o f t h e
Ib)
v a l v e stem.
Valve stem diameter:
I n take 8.973 - 8.989 mm
10.3533 - 0 . 3 5 3 9 i n.l
E x h a u s t 8.954 - 8 . 9 7 0 mm
lei Su btract t h e
10.3525 - 0 . 3 5 3 1 in.l
valve stem diameter measurement from
the b u s h i n g inside diameter measurement.
Standard stem o i l c l e a rance :
0.021 - 0.057 mm
I n t a k e
10.0008 - 0.0022 in.)
E )( haust 0.040 - 0.076 mm
10.00 1 6 - 0.0030 In.1
k
M a x i m u m slem oil cleara n c e :
I nta e 0. 1 0
I f
E x h a u s t 0 . 1 2 m m (0.0047
the c learance is grea t e r than m a x i m u m . replace the valve
and valve g u ide bushing.
SST
1 0. I F N E C E S S A R Y . REPLACE VALVE G U I D E B U S H I N G
(a)
U s i n g and a ham mer. tap o u t the v a l v e guide
SST
b u s h i n g .
0 9 20 1 - 60 0 1 1
Head
in.)
(0.00 39 i n . )
m m
E M - 5 9