Infiniti QX56 (Z62). Manual — part 240
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< REMOVAL AND INSTALLATION >
WATER INLET AND THERMOSTAT ASSEMBLY
WATER INLET AND THERMOSTAT ASSEMBLY
Exploded View
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Removal and Installation
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REMOVAL
1.
Remove engine cover. Refer to
1.
Water inlet
2.
Clamp
3.
Water suction hose
4.
Water suction pipe
5.
Hose connector
6.
Clamp
7.
Water hose
8.
Gasket
9.
Water pipe
10. Heater pipe
11.
O-ring
12.
Water connector
13. Pakkin
14. O-ring
15.
Thermostat housing
16. Clamp
17. Water hose
18.
Pakkin
19. Clamp
20. Water hose
21.
Thermostat
22. Water hose
23. Pakkin
24.
Clamp
A.
To electric throttle control actuator
B.
To oil cooler
C.
To electric throttle control actuator
D.
To radiator
E.
To reservoir tank
F.
To radiator
G
To heater
H.
To heater
Refer to
for symbols in the figure.
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WATER INLET AND THERMOSTAT ASSEMBLY
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< REMOVAL AND INSTALLATION >
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2.
Remove front under cover with power tool. Refer to
.
3.
Drain engine coolant from drain plugs on radiator and cylinder block. Refer to
CAUTION:
• Perform this step when engine is cold.
• Never spill engine coolant on drive belts.
4.
Disconnect radiator hose (upper and lower). Refer to
5.
Remove intake manifold. Refer to
6.
Remove fuel feed tube. Refer to
7.
Remove water hose, water connector, heater pipes and heater hoses.
8.
Remove thermostat housing.
9.
Remove water inlet and thermostat.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.
Thermostat
• Install thermostat with the whole circumference of each flange part
(A) fit securely inside rubber ring (1).
• Install thermostat with jiggle valve (A) facing upwards. The position
deviation may be within the range of 20 degrees (b).
Water Connector and Heater Pipe
• First apply a neutral detergent to O-rings, then quickly insert the insertion parts of the water connector and
heater pipe into the installation holes.
Inspection
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INSPECTION AFTER REMOVAL
• Check that valve in thermostat is completely closing at normal temperature.
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< REMOVAL AND INSTALLATION >
WATER INLET AND THERMOSTAT ASSEMBLY
• Place a thread (A) so that it is caught in the valve 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 falls from the thread.
• After checking the maximum valve lift, lower the water temperature
and check the valve closing temperature.
• If the malfunctioning condition, when valve seating at ordinary
room temperature, or measured values are out of the standard,
replace thermostat.
INSPECTION AFTER INSTALLATION
• Check that the reservoir tank cap is tightened.
• Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the
radiator cap tester (commercial service tool). Refer to
.
• Start and warm up the engine. Visually check that there is no leakage of engine coolant.
Thermostat (Standard)
: Refer to
.
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SERVICE DATA AND SPECIFICATIONS (SDS)
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< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Periodical Maintenance Specification
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ENGINE COOLANT CAPACITY (APPROXIMATELY)
Unit:
(US qt, Imp qt)
Radiator
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Unit: kPa (kg/cm
2
, psi)
Thermostat
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Engine coolant capacity [With reservoir tank (“MAX” level)]
14.9 (15-6/8, 13-1/8)
Reservoir tank engine coolant capacity (At “MAX” level)
1.0 (1, 7/8)
Reservoir tank cap relief pressure
Standard
108.2 - 127.8 ( 1.1 - 1.3, 15.7 - 18.5)
Limit
98 (1.0, 14)
Leakage testing pressure
186 (1.9, 27)
Thermostat
Standard
Valve opening temperature
82
°
C (180
°
F)
Maximum valve lift
10.0 mm/95
°
C (0.394 in/203
°
F)
Valve closing temperature
77
°
C (171
°
F)
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