Infiniti EX35. Manual - part 428

WATER INLET AND THERMOSTAT ASSEMBLY

CO-21

< ON-VEHICLE REPAIR >

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WATER INLET AND THERMOSTAT ASSEMBLY

Exploded View

INFOID:0000000003139297

Removal and Installation

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REMOVAL

1.

Remove engine cover. Refer to 

EM-25, "Exploded View"

.

2.

Remove air duct and air cleaner case assembly (LH). Refer to 

EM-27, "Exploded View"

.

3.

Remove reservoir tank. Refer to 

CO-13, "Exploded View"

.

4.

Remove engine undercover with power tool.

5.

Drain engine coolant from radiator drain plug at the bottom of radiator. Refer to 

CO-7, "Draining"

. 

CAUTION:

• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.

6.

Disconnect radiator hose (lower).

7.

Disconnect intake valve timing control solenoid valve harness connector (bank 2), and remove intake
valve timing control solenoid valve.

8.

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 

GI-4, "Components"

 for symbols in the figure.

JPBIA1466GB

A

: Never loosen these screw.

JPBIA0261ZZ

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WATER INLET AND THERMOSTAT ASSEMBLY

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 leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the

radiator cap tester (commercial service tool). Refer to 

CO-7, "Inspection"

.

• Start and warm up the engine. Visually check that there is no leakage of engine coolant.

Thermostat (Standard)

: Refer to 

CO-25, "Thermostat"

.

SLC949A

WATER OUTLET AND WATER PIPING

CO-23

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WATER OUTLET AND WATER PIPING

Exploded View

INFOID:0000000003139300

Removal and Installation

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REMOVAL

1.

Remove engine undercover with power tool.

2.

Drain engine coolant. Refer to 

CO-7, "Draining"

.

CAUTION:

• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.

3.

Remove engine cover. Refer to 

EM-29, "Exploded View"

.

1.

Clamp

2.

Water hose

3.

Harness bracket

4.

Engine coolant temperature sensor

5.

Heater hose

6.

Clamp

7.

Water outlet (rear)

8.

Gasket

9.

O-ring

10. Water outlet pipe

11.

Water outlet (front)

12.

Radiator cap

13. Clamp

14.

Radiator hose (upper)

15.

Gasket

16. Heater pipe

17.

Clamp

18.

Water hose

19. Water bypass pipe

20.

Clamp

21.

Water hose

22. Heater hose

23.

O-ring

A.

To EVAP piping

B.

To heater core

C.

To radiator

D.

To electric throttle control actuator 
(bank 2)

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1834GB

CO-24

< ON-VEHICLE REPAIR >

WATER OUTLET AND WATER PIPING

4.

Remove air duct and air cleaner case assembly (RH and LH). Refer to 

EM-27, "Exploded View"

.

5.

Remove intake manifold collector. Refer to 

EM-29, "Exploded View"

.

6.

Remove intake manifold. Refer to 

EM-32, "Exploded View"

.

7.

Remove reservoir tank. Refer to 

CO-13, "Exploded View"

.

8.

Remove oil level gauge and guide. Refer to 

EM-43, "Exploded View (2WD)"

 or 

EM-44, "Exploded View

(AWD)"

.

9.

Remove radiator hose (upper) and heater hose.

10. Remove water outlet (front) and water outlet pipe.

11. Remove the following parts, when remove water outlet (rear).

• A/T fluid charging pipe: Refer to 

TM-192, "2WD : Exploded View"

 (2WD models) or 

TM-195, "AWD :

Exploded View"

 (AWD models).

12. Separate engine harness removing their bracket from water outlet (rear).
13. Remove engine coolant temperature sensor as necessary.

CAUTION:

Be careful not to damage engine coolant temperature sensor.

14. Remove heater pipe, water bypass pipe, and water outlet (rear).

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

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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 

CO-7, "Inspection"

.

• Start and warm up the engine. Visually check that there is no leakage of engine coolant.