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
●
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
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
E
F
G
H
I
J
K
L
M
A
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
.
●
Start and warm up engine. Visually make sure that there is no leaks of engine coolant.
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