Toyota 2H Repair Manual page 71

E N G I N E M E C H A N IC A L
{d) C heck t h e valve
Standard overall lengt h :
I n take
E x h a u s t
M i n i m u m overall leng th :
I n take
E x haust
(e) I f t h e valve stem t i p is
g rinder or replace the valve
CAUTION :
a m o u n t .
1 2 . I N S PECT A N D C L E A N V A L V E S E ATS
tal
Using a
Remove o n l y
(bl C h eck the valve s e a t i n g position.
Apply a
t h e valve face. Install the valve. While applying light
pressure to th e
seat.
(c) C h e c k Ihe valve face a n d s e a t
•
•
•
I f not. correct t h e valve s e a l a s fotlows:
( 1 )
- Head
C y l i n d e r
overall
length.
1 20.7 mm (4 . 7 5 2 in.)
1 2 0.6 mm 1 4 . 7 4 8 In.)
1 2 0 . 2 mm (4.732 i n . )
1 20 . 1 m m 1 4 . 7 2 8 i n . )
worn.
Do not grind off more than t h e m i n i m u m
45" c t r.
carbide u te
enough m et a l
thin oat
c o f prussian blue (or white lead) to
valve. rotate
If blu e a p pears 360" around the face. the valve i s
o .
conc entric. I f n t replace t h e valve.
I f blue appears around the valve seat, the
3 6 0 "
g u i d e and seal are concentric. If
seal.
C h e c k thai the seal contact is on t h e
valve face with t h e f o l lowing w i d t h :
1 .4 - (0.055 - 0 . 0 7 9
2.0 mm
the
I f seating i s too high on t h e valve face. use cuNers
and 4 5 " to co rrect t h e seat.
3 0 "
E M - 6 1
resurface t h e lip with a
resurface the valve s e a t s .
10
clean t h e seats.
t h e valve against the
tor t h e
fol lowing :
not.
res urface Ihe
middle
o f the
i n . 1