Toyota 2F - Page 24

3 -10
EN G IN E SERVICE CyfinderHead
Fig.
3· 22
,,
\ ~~ ,..,..ssr
Fig. 3-23
-
Fig. 3-24
Fig.
3· 26
(6)
(7)
Or 1 ve 1n a new valve gu i de un1tl
ols up pro1ects from the top ol the
cylinder head by tho spccofted
length
Protrusion from cylinder
head: 17.5 mm
{0. 689 In.)
Using a reamer. ream th o valve
guide
to obtain the specihed cloa·
ranee
Oil clearance:
STD
IN 0. 03 - 0 . 06 mm
{ 0.0012 - 0 . 0024 In.)
EX 0. 04 - 0. 07 mm
10.0016 - 0. 0028 In .I
Aotoce 1h o valv e seaung fa ce w 11h a vo lv e
re l ace r
Val
ve face angle: 45.5 °
Cl\Ock tho valve head margon thickness
M argin th ick ness:
Limit IN 0.8 mm
(0.03 1 In .)
EX 1.0 mm
(0.039 In.)
Fig. 3- 26
Fig, 3- 27
...
Fig. 3- 29
l
IN j 4 """
ooss •••
EX lo7o3f'1n1
ENG IN E SE RVI CE - Cylinder H ea d
3 11
Check the valve stem 11 p
Resurlaco the valve stem llP
wr1h o valve
grrnder 11 necessary
Stem tip resurfacing:
l i
mit 0.5 mm
(0. 020 In .)
Overall length :
limit IN 124 .3 mm
(4 . 894 In .)
EX 124 .G mm
(4.902 In.I
Valve Seat
1 Check rhe posr11on ol thO valve comact
v11th the seat Coar rhe valve face woth
prussoan blue or red lead Locate lhe con·
1act P<>inl on lhe valve by ro101ong lhe
valve aga1nsl tho sca1
2
& 3
Contact wid th:
IN 1.4 mm
(0. 055 In .)
EX 1.7 mm
(0. 067 In.)
Co n tact position:
Mi ddle ol valve l ace
Resu r fa ce rho valve sea1 w 11 h a ~ 5° culler.
Co rr ect 1h e sea1 pos11oon
I 11 If rhe seat pos11oon 1s 100 h19 h. use a
45° and 65° cu 11 01s In 1he orde1 1 11d 1·
ca1ed