Nissan Altima L32. Instruction — part 196

THERMOSTAT AND THERMOSTAT HOUSING

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THERMOSTAT AND THERMOSTAT HOUSING

Removal and Installation

INFOID:0000000004205449

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 is cold.
1. Drain engine coolant from the radiator. Refer to

CO-12, "Changing Engine Coolant"

.

2. Remove the air duct. Refer to

EM-25, "Removal and Installation"

.

3. Remove radiator lower hose from the engine coolant inlet side.
4. Remove engine coolant inlet and thermostat.

INSPECTION AFTER REMOVAL

1.

Thermostat 2.

O-ring

3.

Engine

coolant

inlet

4.

Water control valve

5.

Gasket

6.

Engine coolant outlet

7.

Copper washer

8.

Engine coolant temperature sensor

9.

Heater pipe

A. To electric throttle control

B. To oil cooler

C. To heater

D. To heater

E. To electric throttle control

F.

To oil cooler

Engine front

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THERMOSTAT AND THERMOSTAT HOUSING

• 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 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.

INSTALLATION

Installation is in the reverse order of removal.

• Install the engine coolant temperature sensor.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-15, "Recommended Chemical Products

and Sealants"

.

• Install the thermostat with the whole circumference of the flange

part fitting securely inside the rubber ring.

• Install the thermostat with the jiggle valve facing upwards. The

position deviation may be within the range of

±10°.

• If necessary, to install the heater pipe, first apply a mild detergent

to the O-ring and then quickly insert the pipe into the housing.

SLC252B

Thermostat Standard

Values

Valve opening temperature

80.5 – 83.5

°C (177 – 182°F)

Full-open lift amount

More than 8 mm / 95

°C (0.315 in / 203°F)

Valve closing temperature

77

°C (171°F) or higher

PBIC0157E

WATER CONTROL VALVE

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WATER CONTROL VALVE

Removal and Installation

INFOID:0000000004205450

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. Drain engine coolant from the radiator. Refer to

CO-12, "Changing Engine Coolant"

.

2. Remove the engine room cover using power tool.
3. Remove the air cleaner and air duct assembly. Refer to

EM-25, "Removal and Installation"

.

4. Remove the upper radiator hose, heater pipe, electric throttle control actuator inlet hose, and heater hose.
5. Remove the engine coolant outlet.
6. Remove the water control valve.

INSPECTION AFTER REMOVAL

1.

Thermostat

2.

O-ring

3.

Engine coolant inlet

4.

Water control valve

5.

Gasket

6.

Engine coolant outlet

7.

Copper washer

8.

Engine coolant temperature sensor

9.

Heater pipe

A. To electric throttle control

B. To oil cooler

C. To heater

D. To heater

E. To electric throttle control

F.

To oil cooler

Engine front

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WATER CONTROL VALVE

• 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.

• Install the engine coolant temperature sensor.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-15, "Recommended Chemical Products

and Sealants"

.

• Install the water control valve with the whole circumference of the flange part fitting securely inside the rub-

ber ring.

• Install the water control valve with the up-mark facing up and the frame center part facing upwards. The

position deviation may be within the range of

±10°.

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