Infiniti Q45. Manual - part 282

 

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Infiniti Q45. Manual - part 282

 

 

WATER PUMP

CO-21

C

D

E

F

G

H

I

J

K

L

M

A

CO

INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using the radiator cap tester adapter [SST: EG17650301(J33984-A)]
and the radiator cap tester (commercial service tool). Refer to 

CO-8, "CHECKING COOLING SYSTEM

FOR LEAKS"

 .

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

CO-22

THERMOSTAT AND WATER CONTROL VALVE

THERMOSTAT AND WATER CONTROL VALVE

PFP:21200

Removal and Installation

NBS001PU

WARNING:

Do not remove radiator cap when engine is hot. Serious burns could occur from high pressure engine
coolant escaping from thermostat housing.

REMOVAL

1.

Drain engine coolant from radiator. Refer to 

CO-8, "Changing Engine Coolant"

 .

CAUTION:

Perform when engine is cold.

2.

Remove air duct (inlet) and engine cover. Refer to 

EM-13, "Removal and Installation"

 .

3.

Remove water suction hose from water inlet side.

4.

Remove water inlet and thermostat.

5.

Remove intake manifold (upper and lower). Refer to 

EM-19, "INTAKE MANIFOLD"

 .

6.

Remove thermostat housing, water outlet pipe, water control valve, rear water outlet and heater pipe
(between left and right banks).

1.

Water connector

2.

O-ring

3.

Rubber ring

4.

Heater hose

5.

Water control valve

6.

Rear water outlet

7.

Gasket

8.

O-ring

9.

Water outlet pipe

10.

Thermostat housing

11.

Radiator cap

12.

Radiator hose (upper)

13.

Thermostat

14.

Rubber ring

15.

Water inlet

16.

Water suction hose

17.

Water suction pipe

18.

Radiator hose (lower)

19.

Gasket

20.

O-ring

21.

Heater pipe

22.

Heater hose

PBIC1990E

THERMOSTAT AND WATER CONTROL VALVE

CO-23

C

D

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CO

INSPECTION AFTER REMOVAL

Make sure that valves both in thermostat and water control valve are completely closing at normal tempar-
ature.

Place a thread so that it is caught in valves of thermostat and
water control valve. Immerse fully in a container filled with water.
Heat while stirring. (The example in the figure shows the ther-
mostat.) 

The valve opening temperature is the temperature at which the
valve opens and falls from the thread. 

Continue heating. Check the maximum valve lift.

NOTE:
The maximum valve lift standard temperature for water control
valve is the reference value.

 After checking the full-open lift amount, lower the water temper-
ature and check the valve closing temperature.

Standard values

If the malfunctioning condition, when closing valve at normal temperature, or measured values are out of
the standard, replace thermostat and/or water control valve.

INSTALLATION

Install in the reverse order of removal.
Installation of thermostat and water control valve

Install thermostat and water control valve with the whole circum-
ference of each flange part fit securely inside rubber ring. (The
example in the figure shows thermostat.) 

Install thermostat with the jiggle-valve facing upwards. (The
position deviation may be within the range of 20 degrees.)

Install 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 20 degrees.)

Installation of water outlet pipe and heater pipe
First apply a neutral detergent to O-rings, then quickly insert the insertion parts of water outlet pipe and heater
pipe into the installation holes.

SLC252B

                        Thermostat

                   Water control valve

Valve opening temperature

80 - 84

°

C (176 - 183

°

 F)     

93.5 - 96.5

°

C (200 - 206

°

F)

Maximum valve lift

More than 10 mm/ 95

°

C

 (0.39 in/ 203 

°

F)

                More than 8 mm/ 108

°

C

(0.315 in/ 226 

°

 F)

Valve closing temperature

 77

°

C (171

°

F)

90

°

C (194

°

 F) 

PBIC0157E

PBIC0158E

CO-24

THERMOSTAT AND WATER CONTROL VALVE

INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using the radiator cap tester adapter [SST: EG17650301 (J33984-A)]
and the radiator cap tester (commercial service tool). Refer to  

CO-8, "CHECKING COOLING SYSTEM

FOR LEAKS"

 .

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

 

 

 

 

 

 

 

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