Infiniti FX35, FX50 (S51). Manual — part 439

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ENGINE

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SECTION

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CONTENTS

ENGINE COOLING SYSTEM

VQ35HR

SYSTEM DESCRIPTION . . . . . . . ..

3

DESCRIPTION . . . . . . . . . . . . .

3

Engine Cooling System . . . . . . . . . . ...

3

Engine Cooling System Schematic . . . . . .....

3

SYMPTOM DIAGNOSIS . . . . . . . ...

4

OVERHEATING CAUSE ANALYSIS . . . . ..

4

Troubleshooting Chart . . . . . . . . . . . ..

4

PRECAUTION . . . . . . . . . . . ...

6

PRECAUTIONS . . . . . . . . . . . . ...

6

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" . . . . . . . . . . . . . . . . ...

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PREPARATION . . . . . . . . . . .

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PREPARATION . . . . . . . . . . . . ...

7

Commercial Service Tools . . . . . . . . . ...

7

PERIODIC MAINTENANCE . . . . . . ..

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ENGINE COOLANT . . . . . . . . . . .

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Inspection . . . . . . . . . . . . . . . . ..

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Draining . . . . . . . . . . . . . . . . .....

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Refilling . . . . . . . . . . . . . . . . .....

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Flushing . . . . . . . . . . . . . . . . ...

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RADIATOR . . . . . . . . . . . . . . .

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RADIATOR CAP . . . . . . . . . . . . . .

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RADIATOR CAP : Inspection . . . . . . . . ..

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RADIATOR . . . . . . . . . . . . . . . .

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RADIATOR : Inspection . . . . . . . . . . ..

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REMOVAL AND INSTALLATION . . . ...

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RADIATOR . . . . . . . . . . . . . . .

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Exploded View . . . . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

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Inspection . . . . . . . . . . . . . . . .

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COOLING FAN . . . . . . . . . . . . ..

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Exploded View . . . . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

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Disassembly and Assembly . . . . . . . . . .

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Inspection . . . . . . . . . . . . . . . .

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WATER PUMP . . . . . . . . . . . . ..

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Exploded View . . . . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

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Inspection . . . . . . . . . . . . . . . .

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WATER INLET AND THERMOSTAT ASSEM-
BLY . . . . . . . . . . . . . . . . .

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Exploded View . . . . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

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Inspection . . . . . . . . . . . . . . . .

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WATER OUTLET AND WATER PIPING . . ..

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Exploded View . . . . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

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Inspection . . . . . . . . . . . . . . . .

25

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . .

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SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . . .

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Periodical Maintenance Specification . . . . .

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Radiator . . . . . . . . . . . . . . . . ...

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Thermostat . . . . . . . . . . . . . . . ..

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VK50VE

SYSTEM DESCRIPTION . . . . . . . .

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DESCRIPTION . . . . . . . . . . . . ..

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Engine Cooling System . . . . . . . . . . ..

27

Engine Cooling System Schematic . . . . . ...

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SYMPTOM DIAGNOSIS . . . . . . . .

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OVERHEATING CAUSE ANALYSIS . . . .

29

Troubleshooting Chart . . . . . . . . . . ...

29

PRECAUTION . . . . . . . . . . . .

31

PRECAUTIONS . . . . . . . . . . . . .

31

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" . . . . . . . . . . . . . . . . .

31

PREPARATION . . . . . . . . . . ...

32

PREPARATION . . . . . . . . . . . . .

32

Commercial Service Tools . . . . . . . . ....

32

PERIODIC MAINTENANCE . . . . . .

33

ENGINE COOLANT . . . . . . . . . . ...

33

Inspection . . . . . . . . . . . . . . . ...

33

Draining . . . . . . . . . . . . . . . . ..

33

Refilling . . . . . . . . . . . . . . . . ...

34

Flushing . . . . . . . . . . . . . . . . ..

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RADIATOR . . . . . . . . . . . . . .

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RADIATOR CAP . . . . . . . . . . . . . ...

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RADIATOR CAP : Inspection . . . . . . . . .

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RADIATOR . . . . . . . . . . . . . . . ....

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RADIATOR : Inspection . . . . . . . . . . ..

37

REMOVAL AND INSTALLATION . . . ..

39

RADIATOR . . . . . . . . . . . . . .

39

Exploded View . . . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

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Inspection . . . . . . . . . . . . . . . .

41

COOLING FAN . . . . . . . . . . . . ..

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Exploded View . . . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

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Disassembly and Assembly . . . . . . . . .

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Inspection . . . . . . . . . . . . . . . .

43

WATER PUMP . . . . . . . . . . . . ...

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Exploded View . . . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

44

Inspection . . . . . . . . . . . . . . . .

45

WATER INLET AND THERMOSTAT ASSEM-
BLY . . . . . . . . . . . . . . . . .

46

Exploded View . . . . . . . . . . . . . .

46

Removal and Installation . . . . . . . . . . .

46

Inspection . . . . . . . . . . . . . . . .

47

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . ..

49

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . . .

49

Periodical Maintenance Specification . . . . .

49

Radiator . . . . . . . . . . . . . . . . ..

49

Thermostat . . . . . . . . . . . . . . . ..

49

DESCRIPTION

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< SYSTEM DESCRIPTION >

[VQ35HR]

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SYSTEM DESCRIPTION

DESCRIPTION

Engine Cooling System

INFOID:0000000005246349

Engine Cooling System Schematic

INFOID:0000000005246350

JPBIA1198GB

JPBIA1199GB

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< SYMPTOM DIAGNOSIS >

[VQ35HR]

OVERHEATING CAUSE ANALYSIS

SYMPTOM DIAGNOSIS

OVERHEATING CAUSE ANALYSIS

Troubleshooting Chart

INFOID:0000000005246351

Symptom

Check items

Cooling sys-
tem parts
malfunction

Poor heat transfer

Water pump malfunction

Worn or loose drive belt

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Thermostat stuck closed

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Damaged fins

Dust contamination or pa-
per clogging

Physical damage

Clogged radiator cooling
tube

Excess foreign material
(rust, dirt, sand, etc.)

Reduced air flow

Cooling fan does not oper-
ate

Fan assembly

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High resistance to fan rota-
tion

Damaged fan blades

Damaged radiator shroud

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—

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Improper engine coolant
mixture ratio

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—

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Poor engine coolant quality

—

Engine coolant density

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Insufficient engine coolant

Engine coolant leakage

Cooling hose

Loose clamp

Cracked hose

Water pump

Poor sealing

Radiator cap

Loose

Poor sealing

Radiator

O-ring for damage, deterio-
ration or improper fitting

Cracked radiator tank

Cracked radiator core

Reservoir tank

Cracked reservoir tank

Overflowing reservoir tank

Exhaust gas leakage into
cooling system

Cylinder head deterioration

Cylinder head gasket deteri-
oration