Infiniti M35/M45 Y50. Manual - part 347

WATER INLET AND THERMOSTAT ASSEMBLY

CO-29

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WATER INLET AND THERMOSTAT ASSEMBLY

PFP:21200

Components

NBS004R3

●

Refer to 

GI-11, "Components"

  for symbols in the figure.

Removal and Installation

NBS004R4

REMOVAL

1.

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

EM-15, "ENGINE ROOM COVER"

 .

2.

Remove air duct (inlet). Refer to 

EM-19, "AIR CLEANER AND AIR DUCT"

 .

3.

Remove front engine undercover using power tool.

4.

Drain engine coolant from radiator drain plug at the bottom of radiator, and from water drain plug at the
front of cylinder block. Refer to 

CO-11, "Changing Engine Coolant"

 and 

CO-24, "WATER PUMP"

 .

CAUTION:

●

Perform this step when the engine is cold.

●

Do not spill engine coolant on drive belts.

5.

Disconnect radiator hose (lower) and oil cooler water hose from water inlet and thermostat assembly.

6.

Remove water inlet and thermostat assembly.

CAUTION:

Do not disassemble water inlet and thermostat assembly.
Replace them as a unit, if necessary.

1.

Water inlet and thermostat assembly

2.

Gasket

A.

To oil cooler

PBIC5002E

SLC962AB

CO-30

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WATER INLET AND THERMOSTAT ASSEMBLY

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.

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.

INSPECTION AFTER INSTALLATION

●

Check for leaks of engine coolant using the radiator cap tester adapter (commercial service tool) and the
radiator cap tester (commercial service tool). Refer to 

CO-11, "LEAK CHECK"

 .

●

Start and warm up the engine. Visually make sure that there is no leaks of engine coolant.

Thermostat

Standard

Valve opening temperature

82

°

C (180

°

F)

Maximum valve lift

8.6 mm/95

°

C (0.339 in/203

°

F)

Valve closing temperature

77 

°

C (171

°

F)

SLC949A

WATER OUTLET AND WATER PIPING

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WATER OUTLET AND WATER PIPING

PFP:11060

Components

NBS004R5

Removal and Installation

NBS004R6

REMOVAL

1.

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

EM-15, "ENGINE ROOM COVER"

 .

2.

Remove engine cover with power tool. Refer to 

EM-21, "INTAKE MANIFOLD COLLECTOR"

 .

3.

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

EM-19, "AIR CLEANER AND AIR DUCT"

.

4.

Remove front engine undercover with power tool.

5.

Drain engine coolant from radiator drain plug at the bottom of radiator, and from water drain plug at the
front of cylinder block. Refer to 

CO-11, "Changing Engine Coolant"

 and 

CO-24, "WATER PUMP"

 .

CAUTION:

●

Perform this step when the engine is cold.

●

Do not spill engine coolant on drive belts.

6.

Remove radiator hose (upper) and heater hose.

7.

Remove the following parts, when remove water outlet.

●

A/T fluid charging pipe: Refer to 

AT-274, "TRANSMISSION ASSEMBLY"

 .

●

Intake manifold collectors (upper and lower): Refer to 

EM-21, "INTAKE MANIFOLD COLLECTOR"

 .

●

Rocker cover (right bank): Refer to 

EM-53, "ROCKER COVER"

 .

8.

Remove engine coolant temperature sensor as necessary.

CAUTION:

Be careful not to damage engine coolant temperature sensor.

1.

Harness bracket

2.

Water hose

3.

Water bypass hose

4.

Engine coolant temperature sensor

5.

Gasket

6.

Water outlet

7.

Heater hose

8.

Water pipe

9.

Radiator hose (upper)

10. Heater pipe

11.

Washer

12.

O-ring

SBIA0484E

CO-32

[VQ35DE]

WATER OUTLET AND WATER PIPING

9.

Remove heater pipe, water bypass hoses and water pipe.

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 pipe into water outlet, apply neutral detergent to O-ring.

INSPECTION AFTER INSTALLATION

●

Check for leaks of engine coolant using the radiator cap tester adapter (commercial service tool) and the
radiator cap tester (commercial service tool). Refer to 

CO-11, "LEAK CHECK"

 .

●

Start and warm up the engine. Visually make sure that there is no leaks of engine coolant.