Mitsubishi 4DQ3 User Manual

Unit: mm (in.)
,,--W'@."Y--er,*-o-~o~,-G
Warpage of gasketed
Regrind'
if warpage is
I -, , ",
~
"'"
,0.05 (0.0020),
max
0.20
00 ,OO!0Q,oq
to
surface
..
(0.0079)
minor .
I
~-
I
-~
I
.c:
B-~~&-~~-()-.!~c::.:~~
-'r
..
..
I
,
I
"'"
C
0
E
:§
>.
U
As-installed
thickness
of
1.35 (0.0531)
±o.OS (± 0.0020)
gasket
Intake
-0.045 CO.OOln)
-0.10
Diameter of
8
(0.315)
-0.060 -0.00236
(-0.004)
valve stem
-0,060 CO.00236)
-0.15
Exhaust
-0.080 -0,00315
(-0,0059)
Intake
0.055 - 0.085
1
0.15 J
Clearance of
[(0.00217 - 0.00l3s)J
(0.0059)
valve stem
8
(0.315)
Replace valve guide if
in guide
Exhaust
0.070 -0.105
[ 0.20 J
repair limit is reached.
[(0.00276 -0.00413)] (0,0079)
\0
'"
..
:a
"C
.::
Valve sinkage
L3
'"
to
0.8 (0.031)
± 0.2 (± 0,008)
Go>
:>
(0.051)
..c:
~
"C
:3
Margin (valve head
-1------
f-------
I--
1.7 (0.067)
*1.2
a
thickness)
(0.047)
• Refacing limit
Face runout of stem
0,03 (0.0012),
max
(prependicularity to
valve face)
Valve guide length
18 (0.709)
±0.3 (±0.012)
outside hole
Valve seat angle
30°
Valve seat width
1.4 (0.055)
±0.14 (±O.OOSS)
1.6
(0.063)
Free length
48.85 (1.9232)
47.6 (1.8740)
'"
Adjust by means of
~
As-installed length
43 0.69)
44
shim(s) if repair
·c
( 1.73)
~
limit is reached.
..
Load compress spring to
19 ± I
15
I
>
initial working length
;;
(41.9
±
2.21)
(33.08)
I
:>
143 mm
(1.69
in.) I kg (Ib)
Squareness
1.5°,
max
Sq uareness of each end
with respect to center line
I


Mitsubishi 4DQ3 Specifications

General

Brand	Mitsubishi
Model	4DQ3
Category	Engine
Language	English