Mitsubishi 4DQ50 - 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-