Toyota 4A-F, Руководство по ремонту

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EM-110
Ie) Check
IhfI
valve
hflad
ma'lilin thickn ....
St.nderd
mMgln
thlckn
...
, 0.8 - 1.2
mm
(0.031 - 0.047
i
n.
)
Minimum m.<gln th l c
kn ... : 0.6
mm
10.020 I
n . )
If
the mergin thickness is less than minimum. r.place the
valve.
Id) Check the valve ove,.II "nglh.
Standard ov.rall I.ngtl'l:
Intake
99.60
mm
(3.9213 I
n
.J
hh�U
99.75
mm
(3.9272
In.)
Minimum ov"ell " nliltll:
InUlk. 19.10
mm
13.901S
1ft.!
hhlust
88.26 mm 13.9076 in.)
II thfl
ove
•• H length Is Ie., Ih,ln minimum. replace the
valve.
I.)
Check Ihe suri.c. of the
�a!�e
stem
tip
for we&<.
If the �.I�e stem lip is worn. resurface IhfI
tip
w i lh II
grind,r or replace the
�alv
•.
CAUTION:
Do
not
lI'ind off more
than
the minimum
oY"ali Ien8th.
12. INSPECT AND CLEAN VALVE SEATS
1.1
Using a 45° cltfbi d
e
culter. resurface the �al�. selts.
Remo�e only enough metal
10
clean the seal5 .
(bi Check Ih. �"'�e .eating position.
Apply a thin coat of p",,,ian
blue
lor white lead)
10
IhfI
�atve flee. LignlfV pt'ss
the �alve a
lil e
i
n tl tne
seat. 00 not fO"" Ihe
�
11� e .
Ie)
Check
the
vll�e face and .... for the follow i ng :
•
If
blue appea
....
360·
.round the f,lc". t h
e
�aI�. is
concentric. If not. r.plae. the �el�e .
•
If
b
l
u. Ippe", 360· eround the �lIlve '"I. the
guld. and face &<e coocentric.
If
not.
,"urf_
the
"et.
, Check that the M�t contact il on thfl middle of the
vllve feee with the following width:
1.0
- 1.4
mm
(0.039 - 0.056 InJ