Infiniti FX35 / FX45. Manual - part 276

 

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Infiniti FX35 / FX45. Manual - part 276

 

 

CO-34

< SERVICE INFORMATION >

[VK45DE]

OVERHEATING CAUSE ANALYSIS

OVERHEATING CAUSE ANALYSIS

Troubleshooting Chart

INFOID:0000000001325866

Symptom

Check items

Cooling sys-
tem parts 
malfunction

Poor heat transfer

Water pump malfunction

Worn or loose drive belt

Thermostat  and water con-
trol valve stuck closed

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

High resistance to fan rota-
tion

Damaged fan blades

Damaged radiator shroud

Improper engine coolant 
mixture ratio

Poor engine coolant quality

Engine coolant density

Insufficient engine coolant

Engine coolant leaks

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 leaks into cool-
ing system

Cylinder head deterioration

Cylinder head gasket deteri-
oration

OVERHEATING CAUSE ANALYSIS

CO-35

< SERVICE INFORMATION >

[VK45DE]

C

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F

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CO

N

P

O

Except cool-
ing system 
parts mal-
function

Overload on engine

Abusive driving

High engine rpm under no 
load

Driving in low gear for ex-
tended time

Driving at extremely high 
speed

Powertrain system malfunc-
tion

Installed improper size 
wheels and tires

Dragging brakes

Improper ignition timing

Blocked or restricted air 
flow

Blocked bumper

Blocked radiator grille

Installed car brassiere

Mud contamination or paper 
clogging

Blocked radiator

Blocked condenser

Blocked air flow

Installed large fog lamp

Symptom

Check items

CO-36

< SERVICE INFORMATION >

[VK45DE]

COOLING SYSTEM

COOLING SYSTEM

Cooling Circuit

INFOID:0000000001325867

System Chart

INFOID:0000000001325868

PBIC4865E

PBIC4866E

ENGINE COOLANT

CO-37

< SERVICE INFORMATION >

[VK45DE]

C

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ENGINE COOLANT

Inspection

INFOID:0000000001325869

LEVEL CHECK

• Check if the reservoir tank engine coolant level is within the “MIN”

to “MAX” when engine is cool.

• Adjust the engine coolant level as necessary.

LEAK CHECK

• To check for leaks, apply pressure to the cooling system with  radi-

ator cap tester (commercial service tool) and radiator cap tester
adapter (commercial service tool) (A).

WARNING:

Do not remove radiator cap when engine is hot. Serious burns
could occur from high-pressure engine coolant escaping from
thermostat housing.

CAUTION:

Higher testing pressure than specified may cause radiator
damage.
NOTE:
In a case engine coolant decreases, replenish radiator with engine coolant.

• If anything is found, repair or replace damaged parts.

Changing Engine Coolant

INFOID:0000000001325870

WARNING:

• To avoid being scalded, do not change engine coolant when engine is hot.
• Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn radiator cap a

quarter of a turn to release built-up pressure. Then turn radiator cap all the way.

DRAINING ENGINE COOLANT

1.

Remove front engine undercover with power tool.

2.

Open radiator drain plug at the bottom of radiator, and then
remove radiator cap. 

When draining all of engine coolant in the system, open water drain plugs on cylinder block. Refer
to 

EM-242, "Disassembly and Assembly"

.

3.

Remove reservoir tank as necessary, and drain engine coolant and clean reservoir tank before installing.

SMA412B

Testing pressure : 157 kPa (1.6 kg/cm

2

, 23 psi)

JPBIA0828ZZ

SBIA0444E

 

 

 

 

 

 

 

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