Nissan Pathfinder (2009 year). Manual - part 142

CO-44

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ENGINE COOLANT

3.

Run the engine until it reaches normal operating temperature.

4.

Press the engine accelerator two or three times under no-load.

5.

Stop the engine and wait until it cools down.

6.

Drain the water from the engine cooling system. Refer to 

CO-12, "Changing Engine Coolant"

.

7.

Repeat steps 2 through 6 until clear water begins to drain from the radiator.

2009 Pathfinder

RADIATOR

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ON-VEHICLE REPAIR

RADIATOR

Exploded View

INFOID:0000000003939414

Removal and Installation

INFOID:0000000003939415

WARNING:

Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine
coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to
release built-up pressure. Carefully remove radiator cap by turning it all the way.

REMOVAL

1.

Remove air dam using power tool.

2.

Remove engine front undercover using power tool.

3.

Drain engine coolant from radiator. Refer to 

CO-11

.

1.

Reservoir tank

2.

Reservoir tank cap

3.

By-pass hose

4.

By-pass tube

5.

Reservoir tank hose

6.

By-pass hose

7.

Mounting rubber (upper)

8.

Upper mount bracket

9.

Radiator cap

10. Radiator 

11.

Mounting rubber (lower)

12. Radiator drain plug

13. O-ring

14. Radiator hose (upper)

15. Radiator hose (lower)

16. Radiator shroud (upper)

17. Radiator shroud (lower)

18. Heater by-pass hose

19. Heater by-pass tube

20. Heater by-pass hose

A.

To thermostat housing

B.

To A/T fluid cooler tube

C.

To transmission auxiliary cooler 

D.

To water suction pipe

E.

To heater tube

⇐

Front

ALBIA0406GB

2009 Pathfinder

CO-46

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RADIATOR

CAUTION:

• Perform this step when engine is cold.
• Do not spill engine coolant on drive belts.

4.

Remove air duct and resonator assembly. Refer to 

EM-167, "Removal and Installation"

.

5.

Remove reservoir tank hoses.
NOTE:
• Remove reservoir tank hose from radiator.
• Remove reservoir tank return hose from engine.

6.

Removal radiator hoses (upper and lower).

CAUTION:

Be careful not to allow engine coolant to contact drive belts.

7.

Disconnect A/T fluid cooler hoses.
• Install blind plug to avoid leakage of A/T fluid.

8.

Remove the radiator shroud (lower). 
• Release the tabs, pull radiator shroud (lower) rearwards and

down to remove.

9.

Remove the radiator shroud (upper) bolts and remove the radia-
tor shroud (upper) (A).

10. Remove the engine cooling fan (crankshaft driven type). Refer to 

CO-49, "Removal and Installation

(Crankshaft Driven Type)"

.

11. Remove front grille. Refer to 

EXT-18, "Removal and Installation"

.

12. Remove the upper mount bracket bolts.

WBIA0407E

WBIA0695E

LBIA0419E

2009 Pathfinder

RADIATOR

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13. Remove the two A/C condenser bolts.

14. Remove radiator as follows:

CAUTION:

Do not damage or scratch A/C condenser and radiator core when removing.

a.

With lifting and pulling radiator in a rear direction, disassemble
mounting rubber (lower) from radiator core support center.

CAUTION:

Because A/C condenser is attached to the front-lower por-
tion of radiator, moving it in the rear direction should be at
minimum.

b.

Lift A/C condenser up and remove radiator after disengaging the
fitting at front-bottom surface.

CAUTION:

Lifting A/C condenser should be minimum to prevent a load
to A/C piping.

c.

After removing radiator, put A/C condenser on radiator core sup-
port center to prevent a load to A/C piping, and temporarily fix it
with rope or similar means.

INSTALLATION

Installation is in the reverse order of removal.

INSPECTION AFTER INSTALLATION

• Check for leaks of engine coolant. Refer to 

CO-11, "System Inspection"

.

• Start and warm up engine. Visually check there are no leaks of engine coolant and A/T fluid.

Checking Radiator

INFOID:0000000003939416

Check radiator for mud or clogging. If necessary, clean radiator as follows.

CAUTION:

• Be careful not to bend or damage the radiator fins.
• When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radia-

tor shroud and horns. Then tape the harness and electrical connectors to prevent water from enter-
ing.

1.

Apply water by hose to the back side of the radiator core vertically downward.

2.

Apply water again to all radiator core surfaces.

3.

Stop washing when dirt and debris no longer flow out from the radiator.

4.

Blow air into the back side of radiator core vertically downward.
• Use compressed air lower than 490 kPa (5 kg/cm

2

, 71 psi) and keep distance more than 30 cm (11.8 in). 

LBIA0421E

PBIC1936E

PBIC1054E

2009 Pathfinder

CO-48

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RADIATOR

5.

 Blow air again into all the radiator core surfaces until no water sprays out.

6.

Check for leaks.

2009 Pathfinder

ENGINE COOLING FAN

CO-49

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ENGINE COOLING FAN

Exploded View

INFOID:0000000003939417

Crankshaft Driven Type

Removal and Installation (Crankshaft Driven Type)

INFOID:0000000003939418

REMOVAL

1.

Remove the air dam using power tool.

2.

Remove the engine front undercover using power tool.

3.

Partially drain engine coolant from radiator. Refer to 

CO-11

.

CAUTION:

• Perform this step when engine is cold.
• Do not spill engine coolant on drive belts.

4.

Remove the air duct and resonator assembly. Refer to 

EM-167, "Removal and Installation"

.

5.

Remove reservoir tank hose from radiator.

6.

Remove reservoir tank hose from engine.

7.

Removal radiator hose (upper) from radiator.

CAUTION:

Do not spill engine coolant on drive belts.

8.

Remove the radiator shroud (lower) and position aside. 
• Release the tabs, pull radiator shroud (lower) rearwards and

down to remove.

9.

Remove the radiator shroud (upper) bolts and remove the radia-
tor shroud (upper) (A).

AWBIA0087GB

1.

Cooling fan

2.

Fan coupling

3.

Fan bracket

4.

Cooling fan pulley

A.

Front mark

⇐

Front

WBIA0407E

WBIA0695E

2009 Pathfinder

CO-50

< ON-VEHICLE REPAIR >

[VK56DE]

ENGINE COOLING FAN

10. Remove the drive belt. Refer to 

EM-155, "Removal and Installation"

.

11. Remove the engine cooling fan.

INSPECTION AFTER REMOVAL

Fan Coupling

Inspect fan coupling for oil leakage and bimetal conditions. 

Fan Bracket

• Visually check that there is no significant looseness in the fan

bracket shaft, and that it turns smoothly by hand.

• If there are any unusual concerns, replace the fan bracket assem-

bly.

INSTALLATION

Installation is in the reverse order of removal.
• Install cooling fan with its front mark “F” facing front of engine. Refer to 

CO-49, "Removal and Installation

(Crankshaft Driven Type)"

.

INSPECTION AFTER INSTALLATION

• Check for leaks of engine coolant. Refer to 

CO-40, "System Inspection"

.

• Start and warm up the engine. Visually make sure that there are no leaks of engine coolant.

Removal and Installation (Motor Driven Type)

INFOID:0000000003939419

REMOVAL

1.

Remove the air dam using power tool.

2.

Remove the engine undercover using power tool.

3.

Loosen the lower fan motor nuts (A).

SLC072

WBIA0418E

ALBIA0405GB

2009 Pathfinder

ENGINE COOLING FAN

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4.

Disconnect harness connector (A) from fan motor.

5.

Remove the upper fan motor bolts (B) and remove the fan grille
and motor assembly. 

INSTALLATION

Installation is in the reverse order of removal.
• Cooling fan is controlled by ECM. For details, refer to 

EC-519, "Description"

.

ALBIA0404GB

2009 Pathfinder