Toyota 2H Repair Manual page 72

E M · 6 2
1 2H.T
loto'.
Others
E N G I N E M E C H A N I C A L
12)
(3)
Id) Hand-lap t h e valve and valve s e a l with an abrasive
c o m p o u n d .
(e) Aher h a n d · lapping, clean t h e valve a n d valve s e a t .
1 3. I N S P E C T VALVE S P R I N G S
( a )
Usmg
v a l v e spring.
Maximum squareness:
I f squareness is greater t h a n maximum, replace t h e valve
spring.
Ib) Using cal ipers, measure the f ree length of the valve
spring.
F r e e leng t h :
I n n e r spring
Outer spring
I f the f r e e l e n g t h i s not as specified. replace the valve
s p ring.
tel
Using a spring t e s t er. measure the tension o f the
valve spring al the specified i n s talled leng l h .
I nstalled tens ion:
Inner spring
Outer spring
I I the instal led tension i s not as specif ied, replace the valve
spring.
-
Cylinder H e a d
II 2H· T Intakel
I f t h e seating is loa Iow a n the valve face. u s e
10
6 0 " and 4 5 " c u tters
I O t h ers]
I f the seating is too Iow a n t h e valve face, use
7 5 0 and cul lers t o correct the seat.
4 5 "
a
steel square, check t h e sQuareness of t h e
2.0 mm 1 0 . 0 7 9 i n . !
4 4 . 3 mm ( 1 .744 i n . )
4 8 . 1 mm ( 1 .894 i n . !
7.6 kg (1 6 . 8 lb. 7 6 N)
at
36,0 mm f 1 . 4 1 7 in.)
22.5 kg (49.6 Ib, 2 2 1 N)
at
40.0 mm ( 1 . 5 7 5 i n . )
co rrect the seat.