Nissan Pathfinder (2012 year). Manual — part 131
ENGINE COOLANT
CO-45
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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 >
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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
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
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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
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 >
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RADIATOR
INSPECTION AFTER INSTALLATION
• Check for engine coolant leaks. Refer to
• 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
(United States and Canada) or
MA-20, "FOR MEXICO : Fluids and Lubricants"
(Mexico).
August 2012
2012 Pathfinder
ENGINE COOLING FAN
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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
.
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
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2012 Pathfinder
CO-50
< REMOVAL AND INSTALLATION >
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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
INSPECTION AFTER INSTALLATION
• Check for coolant leaks. Refer to
• 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
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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
ALBIA0405GB
ALBIA0404GB
August 2012
2012 Pathfinder
CO-52
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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
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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