Nissan Pathfinder (2009 year). Manual - part 137

CO-4

< PRECAUTION >

[VQ40DE]

PRECAUTIONS

• After removing nuts and bolts, separate the mating surface and

remove old liquid gasket sealing using Tool.

CAUTION:

Be careful not to damage the mating surfaces.

• Tap seal cutter to insert it (1), and then slide it by tapping on the

side (2) as shown.

• In areas where Tool is difficult to use, use plastic hammer to lightly

tap the part, to remove it.

CAUTION:

If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.

LIQUID GASKET APPLICATION PROCEDURE

1.

Remove the old liquid gasket adhering to the gasket application
surface and the mating surface using suitable tool.
• Remove liquid gasket completely from the groove of the gas-

ket application surface, bolts, and bolt holes.

2.

Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign materials.

3.

Attach liquid gasket tube to the Tool.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-26, "Recommended Chemical Products and Sealants"

.

4.

Apply the liquid gasket without breaks to the specified location
with the specified dimensions.

• If there is a groove for the liquid gasket application, apply the

liquid gasket to the groove.

• As for bolt holes, normally apply the liquid gasket inside the

holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of this manual.

• Within five minutes of liquid gasket application, install the mat-

ing component.

• If the liquid gasket protrudes, wipe it off immediately.
• Do not retighten nuts or bolts after the installation.
• Wait 30 minutes or more after installation, before refilling the

engine with engine oil and engine coolant.

CAUTION:

If there are specific instructions in this manual, observe them.

Tool number

: KV10111100 (J-37228)

WBIA0566E

PBIC0003E

Tool number

: WS39930000 (

—

)

WBIA0567E

SEM159F

2009 Pathfinder

PREPARATION

CO-5

< PREPARATION >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

CO

N

P

O

PREPARATION

PREPARATION

Special Service Tool

INFOID:0000000003939385

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Commercial Service Tool

INFOID:0000000003939386

Tool number
(Kent-Moore No.)
Tool name

Description

KV10111100
(J-37228)
Seal cutter

Removing chain tensioner cover and water 
pump cover

WS39930000
(

—

)

Tube presser

Pressing the tube of liquid gasket

EG17650301
(J-33984-A)
Radiator cap tester adapter

Adapting radiator cap tester to radiator cap 
and radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)

KV991J0070
(J-45695)
Coolant refill tool

Filling cooling system

KV991J0010
(J-23688)
Engine coolant refractometer

Checking concentration of ethylene glycol in 
engine coolant

NT046

S-NT052

S-NT564

LMA053

WBIA0539E

2009 Pathfinder

CO-6

< PREPARATION >

[VQ40DE]

PREPARATION

Tool name

Description

Power tool

Loosening bolts and nuts

Radiator cap tester

Checking radiator and radiator cap

Coolant system tester adapter

Adapting radiator cap tester to reservoir filler 
neck

Coolant system tester adapter

Adapting radiator cap tester to reservoir cap

PBIC0190E

PBIC1982E

WBIA0408E

WBIA0409E

2009 Pathfinder

COOLING SYSTEM

CO-7

< FUNCTION DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

CO

N

P

O

FUNCTION DIAGNOSIS

COOLING SYSTEM

Cooling Circuit

INFOID:0000000003939387

WBIA0641E

1.

Cylinder block (RH)

2.

Oil cooler

3.

Cylinder head (RH)

4.

Water pump

5.

Radiator

6.

Water inlet

7.

Thermostat

8.

Cylinder head (LH)

9.

Heater pump

10. Cylinder block (LH)

2009 Pathfinder

CO-8

< FUNCTION DIAGNOSIS >

[VQ40DE]

COOLING SYSTEM

Schematic

INFOID:0000000003939388

WBIA0565E

2009 Pathfinder

OVERHEATING CAUSE ANALYSIS

CO-9

< FUNCTION DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

CO

N

P

O

OVERHEATING CAUSE ANALYSIS

Troubleshooting Chart

INFOID:0000000003939389

Symptom

Check items

Cooling sys-
tem parts 
malfunction

Poor heat transfer

Water pump malfunction

Worn or loose drive belt

—

Thermostat 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 viscosity

—

Insufficient engine coolant

Engine coolant leaks

 Cooling hose

Loose clamp

Cracked hose

Heater pump

Physical damage

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

2009 Pathfinder

CO-10

< FUNCTION DIAGNOSIS >

[VQ40DE]

OVERHEATING CAUSE ANALYSIS

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

2009 Pathfinder

ENGINE COOLANT

CO-11

< ON-VEHICLE MAINTENANCE >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

CO

N

P

O

ON-VEHICLE MAINTENANCE

ENGINE COOLANT

System Inspection

INFOID:0000000003939390

WARNING:

• Never remove the radiator/reservoir cap when the engine is hot. Serious burns could occur from

high pressure fluid escaping from the radiator or reservoir.

• Wrap a thick cloth around the cap. Slowly push down and turn it a quarter turn to allow built-up pres-

sure to escape. Carefully remove the cap by pushing down and turning it all the way.

CHECKING COOLING SYSTEM HOSES

Check hoses for the following:
• Improper attachment
• Leaks
• Cracks
• Damage
• Loose connections
• Chafing
• Deterioration

CHECKING RESERVOIR LEVEL

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

MAX when the engine is cool.

• Adjust engine coolant level as necessary.

CHECKING COOLING SYSTEM FOR LEAKS

WARNING:

Never remove the radiator/reservoir cap when the engine is hot. Serious burns could occur from high
pressure coolant escaping from the radiator or reservoir.
• To check for leakage, apply pressure to the cooling system at the

reservoir filler neck using suitable tool and Tool.

CAUTION:

Higher pressure than specified may cause radiator damage.
NOTE:
In case that engine coolant decreases, replenish cooling system
with engine coolant.

• If any concerns are found, repair or replace damaged parts.

CHECKING RESERVOIR CAP

SMA412B

Tool number

: EG17650301 (J-33984-A)

Testing pressure

: 137 kPa (1.4 kg/cm

2

, 20 psi)

WBIA0568E

2009 Pathfinder