Nissan Pathfinder (2012 year). Manual - part 131

 

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Nissan Pathfinder (2012 year). Manual - part 131

 

 

ENGINE COOLANT

CO-45

< PERIODIC MAINTENANCE >

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1. Drain the water from the engine cooling system. Refer to 

CO-12, "Changing Engine Coolant"

.

2. Fill the radiator and the reservoir tank (to the “MAX” line), with water. Reinstall the radiator cap and leave

the vented reservoir cap off.

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.

August 2012

2012 Pathfinder

CO-46

< REMOVAL AND INSTALLATION >

[VK56DE]

RADIATOR

REMOVAL AND INSTALLATION

RADIATOR

Exploded View

INFOID:0000000007357932

Removal and Installation

INFOID:0000000007357933

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure

engine coolant escaping from the 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.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. 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

August 2012

2012 Pathfinder

RADIATOR

CO-47

< REMOVAL AND INSTALLATION >

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CAUTION:

• Perform this step when engine is cold.

• Do not spill engine coolant on drive belts.

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

CO-49, "Removal and Installation

(Crankshaft Driven Type)"

.

3. Remove front grille. Refer to 

EXT-20, "Removal and Installation"

.

4. Remove the upper mount bracket bolts.

5. Remove the two A/C condenser bolts.

6. Remove radiator as follows:

CAUTION:

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

a. Lift and pull radiator rearward to disengage lower rubber mount

from radiator core center support.

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 cen-

ter support and temporarily fasten it to prevent overloading the

A/C piping. 

INSTALLATION

Installation is in the reverse order of removal.

LBIA0419E

LBIA0421E

PBIC1936E

PBIC1054E

August 2012

2012 Pathfinder

CO-48

< REMOVAL AND INSTALLATION >

[VK56DE]

RADIATOR

INSPECTION AFTER INSTALLATION

• Check for engine coolant leaks. Refer to 

CO-11, "System Inspection"

.

• Start and warm up engine. Visually check for coolant and A/T fluid leaks. Repair as necessary.

• Check and adjust engine coolant level and A/T fluid (if equipped). Refer to 

MA-18, "FOR USA AND CAN-

ADA : Fluids and Lubricants"

 (United States and Canada) or  

MA-20, "FOR MEXICO : Fluids and Lubricants"

(Mexico).

August 2012

2012 Pathfinder

ENGINE COOLING FAN

CO-49

< REMOVAL AND INSTALLATION >

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ENGINE COOLING FAN

Exploded View

INFOID:0000000007357934

Crankshaft Driven Type

Removal and Installation (Crankshaft Driven Type)

INFOID:0000000007357935

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure

engine coolant escaping from the 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.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. Remove the engine front under cover. Refer to 

EXT-15, "Removal and Installation"

.

2. 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.

3. Remove the air duct and resonator assembly. Refer to 

EM-164, "Removal and Installation"

.

4. Remove reservoir tank hose from radiator.
5. Remove reservoir tank hose from engine.
6. Remove upper radiator hose.

CAUTION:

Do not spill engine coolant on drive belts.

7. Remove lower radiator hose.
8. Remove A/T fluid cooler hose from radiator.

CAUTION:

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

9. Remove the radiator lower shroud and position aside. 

• Release the tabs, pull radiator lower shroud rearward and

down to remove.

AWBIA0987ZZ

1.

Cooling fan

2.

Fan coupling

3.

Fan bracket

4.

Cooling fan pulley

A.

Front mark

Front

WBIA0407E

August 2012

2012 Pathfinder

CO-50

< REMOVAL AND INSTALLATION >

[VK56DE]

ENGINE COOLING FAN

10. Remove the radiator upper shroud bolts and remove the radiator

upper shroud (A).

11. Remove the drive belt. Refer to 

EM-152, "Removal and Installation"

.

12. Remove the engine cooling fan.
13. Remove fan coupling, if necessary.
14. Remove cooling fan pulley, if necessary.
15. Remove fan bracket, if necessary.

INSPECTION AFTER REMOVAL

Fan Coupling

• Inspect fan coupling for oil leaks and bimetal corrosion conditions.

• If there are concerns, replace the fan coupling.

Fan Bracket

• Check that the fan bracket shaft turns smoothly by hand and is not

excessively loose.

• If there are concerns, replace the fan bracket assembly.

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 coolant leaks. Refer to 

CO-41, "System Inspection"

.

• Start and warm up the engine. Visually check for coolant leaks. Repair as necessary.

Removal and Installation (Motor Driven Type)

INFOID:0000000007357936

REMOVAL

1. Remove the front grille. Refer to 

EXT-20, "Removal and Installation"

.

WBIA0695E

SLC072

WBIA0418E

August 2012

2012 Pathfinder

ENGINE COOLING FAN

CO-51

< REMOVAL AND INSTALLATION >

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2. Loosen the lower fan motor nuts (A).

3. Disconnect harness connector (A) from fan motor.
4. 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-515, "Description"

.

ALBIA0405GB

ALBIA0404GB

August 2012

2012 Pathfinder

CO-52

< REMOVAL AND INSTALLATION >

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WATER PUMP

WATER PUMP

Exploded View

INFOID:0000000007357937

Removal and Installation

INFOID:0000000007357938

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure

engine coolant escaping from the 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.

CAUTION:

• When removing water pump, be careful not to get engine coolant on 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.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. Remove engine front under cover. Refer to 

EXT-15, "Removal and Installation"

.

2. Drain engine coolant from the radiator. Refer to 

CO-42, "Changing Engine Coolant"

.

CAUTION:

• Perform when the engine is cold.

• Do not spill engine coolant on drive belt.

3. Remove the engine room cover (if equipped). Refer to 

EM-163, "Removal and Installation"

.

4. Remove drive belt. Refer to 

EM-152, "Removal and Installation"

.

5. Remove reservoir tank hose from radiator shroud (upper).
6. Remove reservoir tank hose from engine.
7. Remove upper radiator hose.

CAUTION:

Do not spill engine coolant on drive belt.

8. Remove A/T fluid cooler hose from radiator.
9. Remove the engine cooling fan (crankshaft driven type). Refer to 

CO-49, "Removal and Installation

(Crankshaft Driven Type)"

.

10. Remove the water pump pulley.
11. Remove the water pump.

• Engine coolant will leak from the cylinder block, so have a receptacle ready below.

CAUTION:

KBIA2543E

1. Gasket

2. Water pump

3. Water pump pulley

August 2012

2012 Pathfinder

 

 

 

 

 

 

 

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