Nissan Frontier. Manual — part 218
COOLING FAN
CO-19
< REMOVAL AND INSTALLATION >
[QR25DE]
C
D
E
F
G
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M
A
CO
N
P
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COOLING FAN
Exploded View
INFOID:0000000009478165
Removal and Installation (Crankshaft driven type)
INFOID:0000000009478166
WARNING:
Do not 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. Partially drain engine coolant. Refer to
CO-12, "Changing Engine Coolant"
2. Remove air duct and resonator assembly and air duct mounting brackets. Refer to
.
3. Remove upper radiator hose.
4. Disconnect reservoir tank hose from upper shroud and radiator.
5. Remove the upper and lower shrouds. Refer to
.
6. Remove drive belt. Refer to
EM-14, "Removal and Installation"
.
7. Remove cooling fan.
8. Remove fan coupling, if necessary.
9. Remove water pump pulley, if necessary.
INSPECTION AFTER REMOVAL
Fan Coupling
• Inspect fan coupling for oil leakage and bimetal conditions.
• If there are any concerns, replace the fan coupling.
Cooling Fan
• Inspect cooling fan for cracks or warps.
• If there are any concerns, replace the cooling fan.
INSTALLATION
1.
Cooling fan
2.
Fan coupling
3.
Water pump pulley
AWBIA1006GB
SLC072
CO-20
< REMOVAL AND INSTALLATION >
[QR25DE]
COOLING FAN
Installation is in the reverse order of removal.
• Install cooling fan with its front mark “F” facing front of engine.
INSPECTION AFTER INSTALLATION
• Check for engine coolant leaks. Refer to
• Start and warm up the engine. Visually check for engine coolant leaks. Repair as necessary.
WATER PUMP
CO-21
< REMOVAL AND INSTALLATION >
[QR25DE]
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WATER PUMP
Exploded View
INFOID:0000000009478167
Removal and Installation
INFOID:0000000009478168
WARNING:
Do not 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-12, "Changing Engine Coolant"
.
CAUTION:
• Perform this step when the engine is cold.
• Do not spill engine coolant on drive belt.
2. Remove cooling fan and water pump pulley. Refer to
CO-19, "Removal and Installation (Crankshaft driven
.
3. Remove water pump with power tool.
CAUTION:
• Do not reuse gasket.
1.
Gasket
2.
Water outlet
3.
Water pump pulley
4.
Water pump
5.
Thermostat
6.
O-ring
7.
Water inlet
8.
Water pump and thermostat housing 9.
Heater pipe
10. Water hose
11. Water hose
12. Heater outlet
13. Engine coolant temperature sensor
14. Water control valve
A.
To heater
B.
To electric throttle control actuator
C.
To oil cooler
Front
AWBIA0868GB
CO-22
< REMOVAL AND INSTALLATION >
[QR25DE]
WATER PUMP
• Handle water pump vane so that it does not contact any other parts.
• Water pump cannot be disassembled and should be replaced as a unit.
NOTE:
• Engine coolant will leak from cylinder block, so have a receptacle ready below.
INSPECTION AFTER REMOVAL
• Visually check for significant dirt or rust on the water pump body
and vane.
• Check that the vane shaft turns smoothly by hand and is not
excessively loose.
• Replace the water pump assembly if the water pump does not per-
form properly.
INSTALLATION
Installation is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
• Check for engine coolant leaks. Refer to
• Start and warm up the engine. Visually check for engine coolant leaks. Repair as necessary.
PBIC3011E
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