Nissan Pathfinder. Manual - part 294

WATER PUMP

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< 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

—

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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 

EXT-30, "Exploded View"

.

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"

 and

CO-10, "System Inspection"

.

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 

CO-28, "Thermostat"

Full-open lift amount

Refer to 

CO-28, "Thermostat"

Valve closing temperature

Refer to 

CO-28, "Thermostat"

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< REMOVAL AND INSTALLATION >

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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