Mitsubishi 4DQ5 Service Manual Page 21
- Page / 120
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
Rated. / 5. Based on customer reviews
Valve guides
and
valve seats
(1) Check each valve for carboning, burning, wear
or
other
defect
on
head; also check cap
end
and stem
for cracks. Replace the valve
if
damaged.
(2) Check each valve guide for wear. Remember, the
guide wears down more rapidly
at
its
both
ends
than
at
any
other
parts. Measure the inside dia-
meter
of
the guide
at
its ends and a t its middle
part
in
two
directions. Measure the outside dia-
meter
of
each valve stem.
If
the measurement
exceeds the repair limit in Table below, replace
the valve guide.
(3) Valve face and valve seat
,
,
)
~:
(
,
,
.
:~
Wear
on
valve guide
Specifications
Unit: mm (in.)
Check
valve face and valve seat for wear and
contact.
If
valve face is found excessively worn,
reface
it
by
using a valve refacer.
To
reface the
valve, proceed
as
follows:
Item
Standard
Repair
limit
Clearance
Intake
0.055 -0.OS5
0.15
of
valve
(0.00217
-0.00335)
(0.0059)
stem in
0.070-0.105
0.20
valve guide
Exhaust
(0.00276-0.00413)
(0.0079)
Valve guide
18
± 0.3
length out-
(0.709 ± 0.012)
side hole
S
-0.045
-0.060
-0.10
Intake
(0315
-0.00177)
(-0.0039)
Valve stem
.
-0.00236
diameter
8
-0.060
Exhaust
-0.080
-0.15
(0315
-0.00236)
(-0.0059)
. -0.00315
Specifications
Unit: mm (in.)
Item
Nominal
Standard
Repair
Service limit
value limit
Angle
30°
~
n
Sinkage
±0.2
1.3
Valve
O.S
(0.031)
(±O.OOS)
(0.051)
seat
~~~
~I~am
Width
1.4
(0.055)
±0.14
1.6
C:J~
~
Face i
(±0.005S) (0.063)
Valve seat
~
t Valve sinkage 1
Reface up
to
Valve margin
1.7
(0.067)
1.2
angle l
Counterbore
Valve
margin
(0.047)
-17
-
- SERVICE 1
- 1. Major 5
- GENERAL 5
- 1-2 Right-hand side view 6
- Longitudinal sectional view 7
- Transverse sectional view 8
- "til 9
- '1:l 10
- '0 10
- ~ 13500 11
- DISASSEMBLY 12
- (1) and disconnect injection 13
- (3) by loosening union 13
- (1) and remove 13
- (1) and oil ring (2) 17
- (b) Remove 18
- (f) Remove thermostat (5) 18
- Ii nder head 19
- (0.0020) 20
- Valve guides 21
- 'Valve springs 23
- Removing ridge 24
- 1.0. Remarks 25
- Pistons and piston rings 26
- (4) Piston 27
- (7) Piston pin bosses 28
- "c" and 29
- "c" 29
- ~rankpin 30
- (1) Journals 32
- 5393To.00059) 34
- (0.0012 36
- (0.00787) 36
- Camshaft 36
- W' 37
- +0.10 (hole) 38
- ",:e" 39
- (0.0020 40
- REASSEMBLY 41
- 1-Compression rings 42
- Driving 43
- Precombustion-chamber side 44
- (1) and two woodruff keys 45
- (1) with 47
- 48
- (lb-ft) 49
- CYLINDER 50
- ASSEMBLY 50
- (1) into the tappets 51
- I----------=~ 53
- -~-==II 53
- J.00059 54
- (NOTES] 55
- COOLING SYSTEM 56
- ± 2°C (169.7 ± 3.6°F) 56
- (1) Remove pump cover (2) 57
- Reassembly 59
- (1) and install 59
- Fuel circuit 60
- Priming the fuel system 61
- (1) Bringing 62
- (1) Filter 63
- ®--_" 64
- Leak-off pipe packing 65
- 01 this 66
- (3) Seating tightness 67
- 6. Fuel feed pump 68
- Priming 70
- 600 injection-pump rpm 71
- 1.S kg/cm 71
- Tabulated data 73
- (IT) mounted on control 74
- 1. General 75
- Starter 76
- ± 0.3 V 78
- _..JI~'--_Fuse 79
- Dz permits the 80
- (1), and remove starter 81
- 7. Inspection and adjustment 85
- Ammeter 87
- -"' 88
- Alternator 89
- (1) Starting the engine 91
- (f) Fuel injection 91
- (1) Test condition 91
- 760 - 11.4 92
- -fJiGQ' 93
- ( 1.73) 95
- ± 2.21) 95
- I Warpage on 96
- @' 99
- 'U 100
- ""' 101
- "" 102
- (0.130~0.154) 103
- I Replace 104
- '" 105
- SEALANT APPLICATION DATA 106
- Important bolts and nuts 107
- General bolts and 108
- "t 109
- ~"~i 110
- 2·lnstaller 111
- 3-Cran kease 111
- 1-Rod 3-Camshaft bushing 112
- 2-Adaptor 112
- TROUBLESHOOTING 114
- .::;;"' 115
- - - - 0 116
- 0 - - 116
- - 0 - - 116
- -" 117
- '85 120
- Printed in Japan 120
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