manual mitsubishi pajero 4x4 engine cooling.docx
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14-1
ENGINE COOLINGCONTENTS 14109000314
GENERAL INFORMATION . . . . . . . . . . . . . . . . . .2 Engine Coolant Replacement . . . . . . . . . . . . . . . . . . 3
Concentration Measurement . . . . . . . . . . . . . . . . . . . 4SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . .2
COOLING FAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
LUBRICANT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
SEALANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
WATER PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . 10ON-VEHICLE SERVICE . . . . . . . . . . . . . . . . . . . . .3
Engine Coolant Leak Checking . . . . . . . . . . . . . . . . 3
Radiator Cap Valve Opening PressureCheck. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
WATER HOSEAND WATER PIPE . . . . . . . . 13
RADIATOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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14-3ENGINE COOLING On-vehicle Service
ON-VEHICLE SERVICE
ENGINE COOLANT LEAK CHECKING
1. Confirm that the coolant level is up to the filler neck.Installa radiatorcap testerandapply160kPapressure and then check for leakage from the radiator hose o connections.
Caution
14100100167
(1) Be sure to completely clean away any moisturefrom the places checked.When the tester is taken out, be careful not tospill any coolant from it.Becareful, when installingandremovingtheteste and when testing, not to deform the filler nec of the radiator.
(2)
(3)
2. Ifthereisleakage,repairorreplacetheappropriatepart.
RADIATOR CAP VALVE OPENING PRESSURECHECK 14100130203
1.2.
Use a cap adapter to attach the cap to the tester.Increase the pressure until the indicator of the gaugestops moving.
Limit: 64 kPaStandard value: 74 103 kPa
Replace the radiatorcap if the readingdoesnot remain
at
or
above
the
limit.NOTEBe sure that the cap is clean before testing, since rus or other foreign material on the cap seal will cause animproper indication.
3.
ENGINE COOLANT REPLACEMENT 14100120354
1. Drain theenginecoolantbyremoving thedrainplugandthen the radiator cap.Remove the cylinder block drain plug from the cylinde block to drain the engine coolant.Remove the reserve tank to drain the engine coolant.Whentheenginecoolanthasdrained,pourinwaterfromthe radiator cap to clean the engine coolant line.
2.
3.4.
(Leftbank) (Right bank)
Drainplugs
Capadapter
Capadapter
Adapter
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14-4 ENGINE COOLING On-vehicle Service
5. Coat the thread of the cylinderblock drain plug with thespecified sealant and tighten to the specified torque.
Specified sealant:3M Nut Locking Part No. 4171 or equivalent
Securely tighten the radiator drain plug.Install the reserve tank.Remove the air bleed bolt and replace the seal washer.
Fill
the
radiator
until
the
engine
coolant
flows
from
theairbleedboltsection,and then close theair bleedbolt.
6.7.8.
9.
10.Slowly pour the engine coolant into the mouth of theradiator until the radiator is full, and pour also into thereserve tank up to the FULL line.
Recommended antifreeze:MITSUBISHI GENUINEEQUIVALENT
Quantity: 9.0 (10.0) L 8.0 (9.0) L
Caution
COOLANT OR AN
Do
not
use
alcohol
or
methanol
anti-freeze
or
any
engine coolants mixed with alcohol or methanolanti-freeze. The use of an improper anti-freeze cancause the corrosion of the aluminum components .
NOTE(1)(2)
( ) indicates figure for vehicles with rear heater.ForNorway,thenon-aminetypeofantifreezeshouldbe used.
11. Install the radiator cap securely.12. Starttheengineandwarmtheengineuntilthethermostat
opens.(Touchtheradiatorhosewithyourhandtocheckthat warm water is flowing.)
13. After
the
thermostat
opens,
race
the
engine
several
times,and then stop the engine.
14. Cool down the engine, and then pour engine coolantinto the reserve tank until the level reaches the FULLline. If the level is low, repeat the operation from step11.
CONCENTRATION MEASUREMENT 14100110146
Measure the temperature and specificgravity of the enginecoolant to check the antifreeze concentration.
Standard value: 3060%(allowableconcentrationrange)
RECOMMENDEDANTIFREEZE
Antifreeze Allowableconcentration
MITSUBISHIGENUINECOOLANTORANEQUIVALENT
3060%
39 Nm
Cylinder blockdrainplug
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14-5ENGINE COOLING On-vehicle Service
CautionIf the concentration of the anti-freeze is below 30 %, th anti-corrosion property will be adversely affected. Inaddition, if the concentration is above 60 %, both th anti-freezing
andengine coolingpropertierswill decrease,affecting the engine adversely. For these reasons, b sure to maintain the concentration level within thespecified
range.
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14-6 ENGINE COOLING Cooling Fan
COOLING FAN 14100210082
REMOVAL AND INSTALLATION
2 3
4
510 12 Nm5 Nm
6
10 12 Nm
1
4
3
5 65 Nm
2
10 12 Nm
1
Removal steps
1. Shroud assembly2. Drive belts3. Cooling fan and fan clutch
assembly
4. Pulley5. Fan clutch6. Cooling fan
Pre-removal and Post-installation Operation Engine Coolant Draining and Supplying
(Refer to P.14-3.) Radiator Upper Hose Removal and Installation
(Refer to P.14-12.)
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14-7ENGINE COOLING Cooling Fan
INSPECTION
COOLING FAN CHECK
14100220023
Check blades for damage and cracks.Check for cracks and damage around bolt holes in fanhub.Ifanyportionoffanisdamagedorcracked,replacecoolingfan.
FAN
CLUTCH
CHECK Check to ensure that fluid in fan clutch is not leaking
at casejoint and seals. If fluid quantity decreases dueto leakage, fan speed will decrease and engineoverheating might result.When a fan attached to an engine is turned by hand,lightly, it is faulty.Check bimetal strip for damage.
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14-10 ENGINE COOLING Water Pump
WATER PUMP 14100270592
REMOVAL AND INSTALLATION
3117 20 Nm 5 24 Nm 22 Nm
2 214
2 7
6
7
922 Nm 4 512
3 6
11
8
24 Nm 12 15 Nm17 20 Nm
10 12
15
Nm
24 Nm
Removal steps
]A} }C] 1. Radiator upper hose connection2. Water hose connection3. Water outlet fitting bracket4. Water outlet fitting assembly
}A] 5. O-ring6. Gasket7. Thermostat
case8. Gasket9. Water pump bracket
}B] 10.Water pump assembly11. Gasket
}A] 12. O-ring
Air intake hose(Refer to GROUP 15AirCleaner.)
1. Power steering oil pump2. Power steering oil pump bracket3. Thermostat housing4. Thermostat housing gasket5. Water pump assembly
]B}
}B]
6.
Gasket}A]
7.
O-ring
Pre-removal and Post-installation Operation Engine Coolant Draining and Supplying Thermostat Removal and Installation
(Refer to P.14-3.) (Refer to P.14-7.) Timing Belt Removal and Installation
(Refer to GROUP 11.)
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14-11ENGINE COOLING Water Pump
REMOVAL SERVICE POINT
]A}RADIATOR UPPER HOSE/RADIATOR LOWERHOSE DISCONNECTION
Aftermakingmatingmarksontheradiatorhoseandthehoseclamp, disconnect the radiator hose.
]B}POWER STEERING OIL PUMP REMOVAL
1. Remove the power steering oil pump from the bracke with the hose still attached.
2. Place the power steering oil pump somewhere whereit will not to be a hindrance to working, being carefulnot to put too much strain on the hose.
INSTALLATION SERVICE POINTS
}A]O-RING INSTALLATION
Rinse the mounting location of the O-ring and water pipewith water, and install the O-ring and water pipe.
Caution1. Care must be taken not to permit engine oil or other
greases to adhere to the O-ring.2. When inserting the pipe, check to be sure that there
is
no
sand,
dirt,
etc.
on
its
inner
surface.
Waterpump
O-ring
Waterpipe
Mating
marks
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14-13ENGINE COOLING Water Hose and WaterPipe
WATER HOSEAND WATER PIPE 14100330443
REMOVAL
AND INSTALLATION
12131215Nm
2
8 13Nm
9 11 1720Nm1720Nm9
3
7
101215Nm
11
7 12
4 14
156
51720Nm
Removal steps
1. Radiator upper hose connection2. Heater hose connection3. Water outlet fitting assembly4. Gasket5. Thermostat case6. Gasket7. Water hose8. Water outlet pipe assembly
]A} }D] }A] 9. O-ring10.Water passage assembly
}C] 11. Gasket12. Cable band
}B] 13.Water hose14.Water pipe assembly
}A] 15. O-ring
Pre-removal
and Post-installation
Operation Engine Coolant Draining and Supplying
(Refer to P.14-3.) Front Exhaust Pipe and Heat Protector Removal
and
Installation
(Refer
to
GROUP
15 Exhaust
Pipe and Main Muffler.) Intake Manifold Removal and Installation
(Refer to GROUP 15 Intake Manifold.) Thermostat Removal and Installation
(Refer to P.14-7.)
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14-14 ENGINE COOLINGWater Hose and WaterPipe
1012 15 Nm12 15 Nm
26
42 Nm9
9.8 Nm
115
6512
7
42 Nm1
84
9.8 12 Nm
1
313
3
4
4
Removal steps
1. Heater hose connection2. Vacuum pipe installation bolt3. Cable band4. Water hose5. Eye bolt6. Gasket7. Water pipe assemblyA
8. Water hose9. Water pipe assembly B
10. Water hose11. Water pipe assembly C12.Water pipe assembly
}A] 13. O-ring
Pre-removal
and Post-installation Operation Engine Coolant Draining and Supplying
(Refer to P.14-3.) Injection Pipe Removal and Installation
(Refer to GROUP 13E Injection Nozzle.) Intake, Exhaust Manifold Removal and Installation
(Refer to GROUP 15.)
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14-15ENGINE COOLING Water Hose and Water Pipe
REMOVAL SERVICE POINT
]A}RADIATOR UPPER HOSE DISCONNECTION
After making mating marks on the radiator hose and hoseclamp, disconnect the radiator hose.
INSTALLATION SERVICE POINTS
}A]O-RING INSTALLATION
Caution1. Care must be taken not to permit engine oil or other
greases to adhere to the O-ring.2. When inserting the pipe, check to be sure that there
is no sand, dirt, etc. on its inner surface.
}B]WATER HOSE CONNECTION
To reuse the water hose, align the mating marks thatweremade during removal, and then install the hose clamp.
}C]GASKET INSTALLATION
Bendoverthetabstosecurethegaskettothewaterpassageassembly.
}D]RADIATOR UPPER HOSE CONNECTION
1. Insert each hose as far as the projection ofoutlet fitting.
2. Align the mating marks on the radiator hoseclamp, and then connect the radiator hose.
the water
and hose
INSPECTION
WATER PIPEAND HOSE CHECK
Checkthewaterpipeandhoseforcracks,damageandclogs.Replace them if necessary.
14100340132
Projection
Wateroutletfitting a n mar s
Waterpassage assembly
Tab
Gasket
O-ring
Waterpipe
Mating
marks
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14-16 ENGINE COOLING Radiator
RADIATOR 14100150421
REMOVAL AND INSTALLATION
12 Nm
88
1
534
75
Nm
9 105 Nm12 Nm 2
10881
35 6
47
5 Nm
9 25 Nm
10
10
6
Removal
steps
1. Radiator cap2. Drain plug3. Rubber hose connection
6. Shroud assembly7. Radiator lower hose8. Radiator support9. Radiator
10. Lower insulator
]A} }A]
4. Reserve tank assembly]A} }A] 5. Radiator upper hose
Pre-removal and Post-installation Operation Under Cover and Skid Plate Removal and
Installation Engine Coolant Draining and Supplying
(Refer to P.14-3)
Intercooler
Removal
and
Installation (Refer to GROUP 15 Intercooler)
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14-17ENGINE COOLING Radiator
REMOVAL SERVICE POINTS
]A}RADIATOR UPPER HOSE/RADIATOR LOWERHOSE DISCONNECTION
Aftermakingmatingmarksontheradiatorhoseandthehoseclamp, disconnect the radiator hose.
INSTALLATION SERVICE POINT
}A]RADIATOR LOWER HOSE/RADIATOR UPPERHOSE CONNECTION
1. Insert each hose as far as the projection of the waterinlet fitting.
2. Align the mating marks on the radiator hose and hoseclamp, and then connect the radiator hose.
Projection
Water outletfitting or water
inlet
fitting
Matingmarks
Mating
marks
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NOTES