Mitsubishi 4DQ50 Service Manual page 90

Section Units
Parts
.A6.
Checkup Items
Nc.minal Setting ~im~ci
.
Standards
I
(CJ
1 ..
",P,.':.~~
Top
Approx. 11
til
15 Cut
end
cleannces
2~
.A.pprox. 11
IlC
(in free)
..
Oil
.Approx. 10.5
. .
I
§
Cut
e~
cl earances Top
0.3_0.5
..
(When fitted wi th- 2nd
0.3....0.5
'"
I
.-
16
P-
in SI:IIllpI.e:84S.±o)
Oil
0.3....0.5
til
~~
17 Inner and outer diams.
25¢ +0.020-+-0.051 (0.08)
1lC"8
PI
ston Pins
and
standard clearances.
18 gra1!. e-,.ness
aD03f
i~e.
Lfi~~
.s
'-t
small end b rl
..
~t~ll~~~f~rs-
<.l
19 168
±0.05
G.l
§
Weight
20
~J§ft
difference among
±5gr
0
r per unit
til
Pin and rod
Inner and outer diams
..
. .
58¢
+0.035'-+0.100 (0.20 )
ca
21
Co
and
standard clearance
.a
luge-ern
~
22
Width 35 +0.15-+0.35 (0.50)
e
...
...
=
J!
ca
til
==
.lIII
Inner and outer diams.
Metals
. .
Journal s and
65¢ +0. 030-+Q.089 (general)
<II
23
. .
0
and
stan:iard clearances
:0.20
main bearings
24 ~ j~~l widJfh~o.l
3.7 0.1-0.189
(0.30 )
In
rinsz
Wl
t
25
~:t ~
cFter af:!lPPOr-
t at QUrn s
Less thann02 0.05
.Gi
26 .Ax ial runout at rear end
Less than 0.1
;..G.l
--=
""it
IHot~rface
27
Strain
Less than 0.15
0.2
28 Icse:r
~ 03te~
diams.
a st r c earance
13¢
- O. 035"--0. 007
Valve guides
Fitting depth (Height
"i
and
holes
29
above .bead top surface)
18
±0.3
"...,
.!
~
..
30
Valve seat angle 45
0
;..
G.l
"8 ]
-=
Q)
;..
31
Valve depression 0.8
±O.2 1.3
c;
0
Valve seats
.~
~
32
Seat width 1.4 ±0.14
1.6
Stems
Inner and outer
Inlet
8¢
+0.055-+0. CBS
(0.15)
33 diams.and stam-
+0. 07D-+0. 09!:
til
ard clearances
EXhaus
8¢
(0.20)
Q) am
~
-t guides
34
Valve face reface
Ma'b'in Margin
1.
+0.1-0
- 82-