Infiniti G37 Coupe. Manual — part 343
CO-22
< ON-VEHICLE REPAIR >
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
2.
Remove air duct and air cleaner case assembly (LH). Refer to
.
3.
Remove reservoir tank.Refer to
4.
Remove oil cooler water pipe mounting bolt, and move aside water pipe. Refer to
.
5.
Remove engine undercover with power tool.
6.
Drain engine coolant from radiator drain plug at the bottom of radiator. Refer to
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belts.
7.
Disconnect radiator hose (lower).
8.
Disconnect intake valve timing control valve harness connector (LH), and remove intake valve timing con-
trol solenoid.
9.
Remove water inlet and thermostat assembly (1).
CAUTION:
Never disassemble water inlet and thermostat assembly.
Replace them as a unit, if necessary.
INSTALLATION
Note the following, and install in the reverse order of removal.
• Be careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.
1.
Gasket
2.
Water inlet and thermostat assembly
Refer to
for symbols in the figure.
JPBIA1201GB
A
: Do not loosen these screw.
JPBIA0261ZZ
WATER INLET AND THERMOSTAT ASSEMBLY
CO-23
< ON-VEHICLE REPAIR >
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Inspection
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INSPECTION AFTER REMOVAL
1.
Check valve seating condition at ordinary room temperatures. It should seat tightly.
2.
Check valve operation.
• If the malfunctioning condition, when valve seating at ordinary
room temperature, or measured values are out of the standard,
replace water inlet and thermostat assembly.
INSPECTION AFTER INSTALLATION
• Check that the reservoir tank cap is tightened.
• 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
.
• Start and warm up the engine. Visually check that there is no leaks of engine coolant.
Thermostat (Standard)
: Refer to
.
SLC949A
CO-24
< ON-VEHICLE REPAIR >
WATER OUTLET AND WATER PIPING
WATER OUTLET AND WATER PIPING
Exploded View
INFOID:0000000001547677
Removal and Installation
INFOID:0000000001547678
REMOVAL
1.
Remove engine cover. Refer to
2.
Remove reservoir tank. Refer to
.
3.
Remove oil level gauge and guide. Refer to
.
4.
Remove air duct and air cleaner case assembly (RH and LH). Refer to
5.
Remove engine undercover with power tool.
6.
Drain engine coolant from radiator drain plug at the bottom of radiator. Refer to
1.
Clamp
2.
Water hose
3.
Harness bracket
4.
Water outlet (rear)
5.
Heater hose
6.
Gasket
7.
Washer
8.
Engine coolant temperature sensor
9.
O-ring
10. Water outlet pipe
11.
Water outlet (front)
12.
Clamp
13. Radiator hose (upper)
14.
Gasket
15.
Water pipe
16. Clamp
17.
Water hose
18.
Water hose
19. Gasket
20.
Heater pipe
21.
Clamp
22. Water hose
23.
Clamp
24.
Heater hose
25. Water bypass pipe
26.
O-ring
27.
Heater hose
A.
To EVAP piping
B.
To heater core
C.
To radiator
D.
To oil cooler
E.
To electric throttle control actuator
Refer to
for symbols in the figure.
JPBIA1200GB
WATER OUTLET AND WATER PIPING
CO-25
< ON-VEHICLE REPAIR >
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D
E
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CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belts.
7.
Remove radiator hose (upper) and heater hose.
8.
Separate engine harness removing their bracket from water outlet (rear).
9.
Remove engine coolant temperature sensor as necessary.
CAUTION:
Be careful not to damage engine coolant temperature sensor.
10. Remove heater pipe, water bypass pipe and water outlet pipe.
11. Remove water outlet (rear) as necessary.
NOTE:
Removing engine assembly is required. Refer to
.
INSTALLATION
Note the following, and install 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.
• When inserting water outlet pipe and water bypass pipe into water outlet, apply neutral detergent to O-ring.
CAUTION:
Never allow water outlet (rear) to nip O-rings when installing water outlet pipe and water bypass pipe.
Inspection
INFOID:0000000001547679
INSPECTION AFTER INSTALLATION
• Check that the reservoir tank cap is tightened.
• 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
.
• Start and warm up the engine. Visually check that there is no leaks of engine coolant.
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