Infiniti FX35, FX50 (S51). Manual — part 450

WATER PUMP

CO-45

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CAUTION:

• Handle the water pump vane so that it does not contact any other parts.
• Never disassemble water pump.

INSTALLATION

Install in the reverse order of removal.

Inspection

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INSPECTION AFTER REMOVAL

• Visually check that there is no significant dirt or rusting on water

pump body and vane (A).

• Check there is no slack in vane shaft, and that it turns smoothly

when rotated by hand.

• If anything is found, replace water pump.

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-33, "Inspection"

.

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

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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 and engine room cover (RH and LH). Refer to

EM-174, "Exploded View"

.

1.

Radiator cap

2.

Water inlet

3.

Clamp

4.

Water suction hose

5.

Water suction pipe

6.

Clamp

7.

Water hose

8.

Water hose

9.

Gasket

10. O-ring

11.

Heater pipe

12.

Gasket

13. Water connector

14. O-ring

15.

Water pipe

16. Clamp

17. Water hose

18.

Water pipe

19. Gasket

20. Thermostat housing

21.

Thermostat

22. Gasket

A.

To electric throttle control actuator

B.

To radiator

C.

To reservoir tank

D.

To oil cooler

E.

To heater

Refer to

GI-4, "Components"

for symbols in the figure.

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WATER INLET AND THERMOSTAT ASSEMBLY

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2.

Remove air duct (inlet). Refer to

EM-177, "Exploded View"

.

3.

Remove reservoir tank. Refer to

CO-39, "Exploded View"

.

4.

Remove engine undercover with a power tool.

5.

Drain engine coolant from drain plugs on radiator and cylinder block. Refer to

CO-33, "Draining"

and

EM-

202, "Setting"

.

CAUTION:

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

6.

Disconnect radiator hose (upper and lower). Refer to

CO-39, "Exploded View"

.

7.

Remove intake manifold. Refer to

EM-179, "Exploded View"

.

8.

Remove water suction pipe and water suction hose.

9.

Remove water inlet and thermostat.

10. Remove water connector, heater pipes and heater hoses.

11. Remove thermostat housing.

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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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

CO-33, "Inspection"

.

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

Thermostat (Standard)

: Refer to

CO-49, "Thermostat"

.

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