Nissan Frontier D40. Manual — part 191

THERMOSTAT AND THERMOSTAT HOUSING

CO-25

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• When inserting heater pipe end into water pump and thermostat housing, apply a neutral detergent to O-

ring. Then insert it immediately.

INSPECTION AFTER INSTALLATION

• Check for leaks of engine coolant. Refer to

CO-11, "System Inspection"

.

• Start and warm up the engine. Visually check if there is no leaks of engine coolant.

CO-26

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WATER CONTROL VALVE

WATER CONTROL VALVE

Exploded View

INFOID:0000000005276096

Removal and Installation

INFOID:0000000005276097

WARNING:

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

REMOVAL

CAUTION:

Perform when the engine cold.
1.

Partially drain the engine coolant from the radiator. Refer to

CO-12, "Changing Engine Coolant"

.

2.

Disconnect the heater hose and water hoses from the heater outlet.

3.

Remove the heater outlet.

4.

Remove the water control valve.

5.

Remove the engine coolant temperature sensor, if necessary.

CAUTION:

Be careful not to damage engine coolant temperature sensor.

INSPECTION AFTER REMOVAL

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

WATER CONTROL VALVE

CO-27

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• Place a thread so that it is caught in the valve of the water control

valve. Immerse fully in a container filled with water. Heat while stir-
ring.

• The valve opening temperature is the temperature at which the

valve opens and the falls from the thread.

• Continue heating. Check the full-open lift amount.

NOTE:
The full-open lift amount standard temperature for the water con-
trol valve is the reference value.

• After checking the full-open lift amount, lower the water tempera-

ture and check the valve closing temperature.

Standard values

INSTALLATION

Installation is in the reverse order of removal.

Water Control Valve

• Install water control valve by making rubber ring (1) groove fit to

water control valve flange (A) around the whole circumference.

• Install water control valve with jiggle valve (A) facing upwards. The

position deviation may be within the range of 20

°

(b).

• Install the engine coolant temperature sensor if removed.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-

22, "Recommended Chemical Products and Sealants"

.

SLC252B

Water Control Valve

Standard Value

Valve opening temperature

93.5

°

- 96.5

°

C (200

°

- 206

°

F)

Full-open lift amount

More than 8 mm / 108

°

C (0.315 in / 226

°

F)

Valve closing temperature

90

°

C (194

°

F) or higher

PBIC3317J

JPBIA2314ZZ

CO-28

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WATER OUTLET AND WATER PIPING

WATER OUTLET AND WATER PIPING

Exploded View

INFOID:0000000005276098

Removal and Installation

INFOID:0000000005276099

REMOVAL

1.

Partially drain engine coolant from the radiator. Refer to

CO-12, "Changing Engine Coolant"

.

CAUTION:

• Perform this step when engine is cold.
• Do not spill engine coolant on drive belts.

2.

Remove the air duct. Refer to

EM-25, "Exploded View"

.

3.

Disconnect radiator hose (upper) at water outlet side. Refer to

CO-16, "Exploded View"

.

4.

Remove water outlet.

INSTALLATION

Installation is in the reverse order of removal.
• Securely insert each hose, and install clamp at a position where it does not interfere with the pipe bulge.

INSPECTION AFTER INSTALLATION

• Check for leaks of engine coolant. Refer to

CO-11, "System Inspection"

.

• Start and warm up engine. Visually make sure that there is no leaks of engine coolant.

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