Nissan Pathfinder. Manual — part 294
WATER PUMP
CO-23
< REMOVAL AND INSTALLATION >
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INSPECTION AFTER INSTALLATION
• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to
MA-15, "FOR USA AND CANADA : Fluids and Lubricants"
(United
States and Canada) and
MA-16, "FOR MEXICO : Fluids and Lubricants"
(Mexico).
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine
. Refill to specified level, if necessary.
• Summary of the inspection items:
*Power steering fluid, brake fluid, etc.
Item
Before starting engine
Engine running
After engine stopped
Engine coolant
Level
Leaks
Level
Engine oil
Level
Leaks
Level
Transaxle fluid
CVT Models
Leaks
Level/Leaks
Leaks
Level/Leaks
Leaks
Level/Leaks
Other oils and fluids*
Level
Leaks
Level
Fuel
Leaks
Leaks
Leaks
Exhaust gas
—
Leaks
—
CO-24
< REMOVAL AND INSTALLATION >
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THERMOSTAT AND THERMOSTAT HOUSING
THERMOSTAT AND THERMOSTAT HOUSING
Exploded View
INFOID:0000000009177990
Removal and Installation
INFOID:0000000009177991
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.
CAUTION:
• Perform when engine is cold.
• Do not spill engine coolant on the drive belt.
• Do not spill engine oil on rubber parts such as the drive belt or engine mount insulators.
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, "Changing Engine Coolant"
.
2. Disconnect coolant reservoir hose and remove coolant reservoir tank.
3. Remove front under cover. Refer to
.
4. Disconnect intake valve timing control solenoid valve (LH) harness connector.
5. Remove the lower radiator hose.
6. Remove thermostat assembly (water inlet).
• Do not disassemble thermostat assembly (water inlet).
Replace as a unit, (if necessary).
INSPECTION AFTER REMOVAL
1.
Gasket
2.
Thermostat assembly (water inlet)
AWBIA0847GB
SLC962AA
THERMOSTAT AND THERMOSTAT HOUSING
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• Place a thread so that it is caught in the valves of the thermostat.
Immerse fully in a container filled with water. Heat while stirring.
• The valve opening temperature is the temperature at which the
valve opens and the thermostat falls from the thread.
• Continue heating. Check the full-open lift amount.
NOTE:
The full-open lift amount standard temperature for the thermostat is
the reference value.
• After checking the full-open lift amount, lower the water tempera-
ture and check the valve closing temperature.
• If thermostat values are out of standard range, replace water inlet and thermostat assembly.
INSTALLATION
Installation is in the reverse order of removal.
• After installation, refill engine coolant and check for leaks. Refer to
CO-11, "Changing Engine Coolant"
.
CAUTION:
Do not spill engine coolant in engine compartment. Use a shop cloth to absorb engine coolant.
SLC949A
Thermostat
Standard Values
Valve opening temperature
Refer to
Full-open lift amount
Refer to
Valve closing temperature
Refer to
CO-26
< REMOVAL AND INSTALLATION >
[VQ35DE]
WATER OUTLET AND WATER PIPING
WATER OUTLET AND WATER PIPING
Exploded View
INFOID:0000000009177992
Removal and Installation
INFOID:0000000009177993
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
CAUTION:
Perform when the engine is cold.
1. Remove engine room cover. Refer to
EM-23, "Removal and Installation"
2. Partially drain engine coolant from radiator. Refer to
CO-11, "Changing Engine Coolant"
1.
Heater hose
2.
Clamp
3.
Water hose
4.
Clamp
5.
Water outlet
6.
Gasket
7.
Gasket
8.
Water connector
9.
O-ring
10. Water bypass pipe
11. Clamp
12. Water hose
13. Heater pipe
14. Water hose
15. Heater hose
16. Coolant temperature sensor
17. Clamp
18. Radiator hose (upper)
A.
To heater core
B.
To electric throttle control actuator
C.
To CVT oil warmer
D.
To radiator
AWBIA1107GB
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