Nissan Pathfinder (2009 year). Manual - part 139

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ENGINE COOLING FAN

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-19, "Removal and Installation

(Crankshaft driven type)"

.

INSPECTION AFTER INSTALLATION

• Check for leaks of the engine coolant. Refer to 

CO-11, "System Inspection"

.

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

Removal and Installation (Motor driven type)

INFOID:0000000003939397

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-12, "Changing Engine Coolant"

.

CAUTION:

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

4.

Release the radiator shroud (lower) (2) from the radiator shroud
(upper) (1) and position aside. 
• Release the tabs, pull radiator shroud (lower) (2) rearwards

and down.

5.

Remove air duct. Refer to 

EM-25, "Removal and Installation"

.

6.

Remove reservoir tank hose from radiator shroud (upper).

7.

Remove the radiator shroud (upper) bolts and remove the radiator shroud (upper). Refer to 

CO-16,

"Exploded View"

.

SLC072

LBIA0422E

ALBIA0470ZZ

2009 Pathfinder

ENGINE COOLING FAN

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8.

Disconnect harness connector from fan motor.

9.

Remove the bolt 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-311, "Diagnosis Procedure"

.

AWBIA0148ZZ

2009 Pathfinder

CO-22

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WATER PUMP

WATER PUMP

Exploded View

INFOID:0000000003939398

Removal and Installation

INFOID:0000000003939399

CAUTION:

• When removing water pump assembly, be careful not to get engine coolant on timing chain and drive

belt.

• Water pump cannot be disassembled and should be replaced as a unit.
• After installing water pump, connect hoses and clamps securely, then check for leaks.

REMOVAL

1.

Remove air dam using power tool.

2.

Remove engine front undercover using power tool.

3.

Remove air duct and resonator assembly. Refer to 

EM-25, "Removal and Installation"

.

4.

Remove drive belt. Refer to 

EM-13, "Removal and Installation"

.

5.

Drain engine coolant. Refer to 

CO-11

.

CAUTION:

• Perform this step when engine is cold.
• Do not spill engine coolant on timing chain and drive belt.

6.

Remove radiator hose (upper).

7.

Remove cooling fan (Crankshaft driven type). Refer to 

CO-19, "Removal and Installation (Crankshaft

driven type)"

.

1.

Water pump

2.

Timing chain tensioner (primary)

3.

Chain tensioner cover

4.

Water drain plug (front)

5.

Water pump cover

6.

O-ring

7.

O-ring

PBIC2833E

2009 Pathfinder

WATER PUMP

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8.

Remove chain tensioner cover and water pump cover from front
timing chain case, using Tool.

9.

Remove timing chain tensioner (primary) as follows:

a.

Loosen clip of timing chain tensioner (primary), and release
plunger stopper (1).

b.

Insert plunger into tensioner body by pressing slack guide (2).

c.

Keep slack guide pressed and hold plunger in by pushing stop-
per pin through the tensioner body hole and plunger groove (3).

d.

Turn crankshaft pulley clockwise so that timing chain on the tim-
ing chain tensioner (primary) side is loose.

e.

Remove bolts and remove timing chain tensioner (primary).

CAUTION:

Be careful not to drop bolts inside timing chain case.

10. Remove water pump as follows:

Tool number

: KV10111100 (J-37228)

PBIC2662E

PBIC2835E

PBIC2834E

PBIC2836E

2009 Pathfinder

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WATER PUMP

a.

Remove three water pump bolts. Secure a gap between water
pump gear and timing chain, by turning crankshaft pulley coun-
terclockwise until timing chain looseness on water pump
sprocket becomes maximum. 

b.

Screw M8 bolts [pitch: 1.25 mm (0.049 in) length: approx. 50
mm (1.97 in)] into water pumps upper and lower bolt holes until
they reach timing chain case. Then, alternately tighten each bolt
for a half turn, and pull out water pump.

CAUTION:

• Pull straight out while preventing vane from contacting

socket in installation area.

• Remove water pump without causing sprocket to contact

timing chain.

• Do not spill engine coolant into timing chain case.

c.

Remove M8 bolts and O-rings from water pump.

CAUTION:

Do not disassemble water pump.
NOTE:
Do not reuse O-rings.

INSPECTION AFTER REMOVAL

• Visually check that there is no significant dirt or rust on the water pump body and vane.
• Make sure there is no looseness in the vane shaft, and that it turns

smoothly when rotated by hand.

• Replace water pump, if necessary.

INSTALLATION

1.

Install new O-rings to water pump.
NOTE:
• Apply engine oil to O-rings.
• Locate O-ring with white paint mark to engine front side.

PBIC2863E

JLC357B

SLC943A

PBIC2837E

2009 Pathfinder

WATER PUMP

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2.

 Install water pump.

CAUTION:

Do not allow timing chain case to pinch O-rings when
installing water pump.
• Make sure that timing chain and water pump sprocket are

engaged.

• Insert water pump by tightening bolts alternately and evenly.

3.

Install timing chain tensioner (primary) as follows:

a.

Remove dust and foreign material completely from backside of timing chain tensioner (primary) and from
installation area of rear timing chain case.

b.

Turn crankshaft pulley clockwise so that timing chain on the timing chain tensioner (primary) side is loose.

c.

Install timing chain tensioner (primary) with its stopper pin attached.

CAUTION:

Be careful not to drop bolts inside timing chain case.

d.

Remove stopper pin.

e.

Make sure again that timing chain and water pump sprocket are engaged.

4.

Install chain tensioner cover and water pump cover as follows:

a.

Before installing, remove all traces of old liquid gasket from mat-
ing surface of water pump cover and chain tensioner cover
using scraper. Also remove traces of old liquid gasket from the
mating surface of front timing chain case.

b.

Apply a continuous bead of liquid gasket, to mating surface of chain tensioner and water pump cover,
using Tool.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-26, "Recommended Chemical Products and Sealants"

.

CAUTION:

Attaching should be done within 5 minutes after coating.

c.

Tighten bolts to specified torque. Refer to 

EM-50, "Exploded

View"

.

PBIC1058E

PBIC2838E

SLC446B

Tool number

: WS39930000 (

—

)

PBIC2663E

2009 Pathfinder

CO-26

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WATER PUMP

5.

Refill engine coolant system. Refer to 

CO-12, "Changing Engine Coolant"

.

• Apply liquid gasket to the thread of water drain plug (front).

Use Genuine RTV Silicone Sealant or equivalent. Refer to 

GI-26, "Recommended Chemical Prod-

ucts and Sealants"

.

6.

Installation of the remaining components is in the reverse order of removal after this step.
• After starting engine, let idle for three minutes, then rev engine up to 3,000 rpm under no load to

purge air from the high-pressure chamber of chain tensioner. Engine may produce a rattling
noise. This indicates that air still remains in the chamber and is not a matter of concern.

INSPECTION AFTER INSTALLATION

• Check for leaks of engine coolant. Refer to 

CO-11, "System Inspection"

.

• Start and warm up engine. Visually check for leaks of engine coolant.

2009 Pathfinder

WATER INLET AND THERMOSTAT ASSEMBLY

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WATER INLET AND THERMOSTAT ASSEMBLY

Exploded View

INFOID:0000000003939400

Removal and Installation

INFOID:0000000003939401

REMOVAL

1.

Drain engine coolant from the radiator. Refer to 

CO-12, "Changing Engine Coolant"

.

CAUTION:

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

2.

Remove air duct and resonator assembly. Refer to 

EM-25, "Removal and Installation"

.

3.

Disconnect radiator hose (lower) and oil cooler hose from water inlet and thermostat assembly.

4.

Remove water inlet and thermostat assembly.

CAUTION:

• Do not disassemble water inlet and thermostat assembly. 
• Replace water inlet and thermostat assembly as a unit, if

necessary.

INSPECTION AFTER REMOVAL

1.

Check valve seating condition at ordinary room temperatures. It should seat tightly.

1.

Water inlet and thermostat assembly 2.

Gasket

PBIC2839E

SLC962AB

2009 Pathfinder