manual mitsubishi pajero 4x4 engine cooling.docx

8/11/2019 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


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


16/18

14-16 ENGINE COOLING Radiator

RADIATOR 14100150421


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)


17/18

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

manual mitsubishi pajero 4x4 engine cooling.docx

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