Mitsubishi 4DQ5 Service Manual Page 93
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- TROUBLESHOOTING
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Item
Maximum rpm
(no-load)
Minimum rpm (no-load)
Compression pressure
Engine oil pressure
Valve
Open
timing
In take valves
[3mm
Close
(0.12irt)
added
Open
to valve
Exhaust valves
side
1
Close
Fuel injection timing
Warpage
of
gasketed surface
Inside diameter
Cylinder
sleeve
Out
of
roundness
Taper
MAINTENANCE
STANDARDS
Unit: mm, (in.)
Nominal
Assembly
standard
Repair limit
Service
limit
Remedy
I
dimension
[Standard
clearance]
[Clearance]
[Clearance]
Remarks
Varies according to customers' specifications. Asjust governor.
650
-700
26
kg/cm
2
(370 psi), min
20 kg/cm
2
Oil and water temperatures:
(at
150 - 200 rpm)
(284 psi)
20 - 30°C (68 - 86°F)
3
-4
kg/cm
2
(43
-57
psi) 2 kg/cm
2
(at 1500 rpm)
(28.4 psi)
Oil temperature:
70°C (158°F)
1-2
kg/cm
2
04.2
-28.4
psi), min
0.5 kg/cm
2
(at idle speed)
(7.1 psi)
24°
ATDC
4°
BBDC
These values are
to
be referred
to
in measuring timing and
13°
16°
'BBDC
differ from actual timing.
28° BTDC
~ngi.ne
specifications (rpm)
1150011800
I
2000122001250013000136001
Standard values are shown.
E'BTIJ('(
)
1 23 I
24 I
25
I 26 1 28 I 30 I 33 I
Check timing
on
caution plate.
A-"lt-,=.::-
--
-r----_'"'"..,.
--
F
I
-fJiGQ'
:
---
1--:-
:
0.05 (0.0020), max
0.20
Regrind if warpage
is
B-~_-G
(0.008) minor.
, I I
C 0
E
All sleeves should be finished
84
(3.307)
+g.035
tg.00138)
+0.20
0.70
to
the same oversize. Hone
(+0.008)
(0.0276)
Hone sleeve to 0.25
cylinder bore to
(0.0098), 0.50 (0.00197)
8To.010(3425-0.00039)
or 0.75 (0.0295) oversize
0.01 (0.0004), max
-0.045'
-0.00177
with prescribed tolerance.
and heat the crankcase .
0.Q15 (0.0006), max
Oversize pistons and
Press sleeves into crankcase and
piston rings should be
machine each sleeve lD to
used.
assem bly standard.
a9
EEl
- 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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