Infiniti M35/M45 Y50. Manual - part 345

RADIATOR (ALUMINUM TYPE)

CO-21

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4.

Make sure that the rim is completely crimped down.

5.

Make sure that there is no leakage. Refer to 

CO-21, "INSPECTION"

 .

INSPECTION

1.

Apply pressure with the radiator cap tester adapter (commercial
service tool) (A) and the radiator cap tester (commercial service
tool).

WARNING:

To prevent the risk of hose coming undone while under
pressure, securely fasten it down with hose clamp.

CAUTION:

Attach hose to A/T fluid cooler to seal its inlet and outlet. 

2.

Check for leakage by soaking radiator in water container with
the testing pressure applied.

Standard height “H”

: 8.0 - 8.4 mm (0.315 - 0.331 in)

SLC554A

Testing pressure

: 157 kPa (1.6 kg/cm

2

 , 23 psi)

PBIC5327E

SLC934

CO-22

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COOLING FAN

COOLING FAN

PFP:21140

Components

NBS004QY

Removal and Installation 

NBS004QZ

REMOVAL

1.

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

EM-15, "ENGINE ROOM COVER"

 .

2.

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

EM-19, "AIR CLEANER AND AIR DUCT"

.

3.

Drain engine coolant from radiator. Refer to 

CO-11, "ENGINE COOLANT"

 .

4.

Disconnect harness connector from cooling fan control module, and move harness to aside.

5.

Remove radiator hose (upper). Refer to 

CO-14, "RADIATOR"

 .

6.

Remove cooling fan assembly.

CAUTION:

Be careful not to damage or scratch on radiator core.

INSTALLATION

Note the following, and install in the reverse order of removal.

CAUTION:

Only use genuine parts for radiator shroud and cooling fan mounting bolt and observe the specified
torque (to prevent radiator from being damaged).

INSPECTION AFTER INSTALLATION

Make sure that fan motors operate normally.

1.

Sub-harness

2.

Cooling fan control module

3.

Sub-harness

4.

Fan motor (LH)

5.

Fan motor (RH)

6.

Fan shroud

7.

Cooling fan (RH)

8.

Cooling fan (LH)

A.

Apply on fan motor shaft.

 

: Apply Genuine High Strength Lock-
ing Sealant or equivalent.

KBIA3567J

COOLING FAN

CO-23

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NOTE:
Cooling fans are controlled by cooling fan control module. For details, refer to 

EC-499, "DTC P1217 ENGINE

OVER TEMPERATURE"

 .

Disassembly and Assembly 

NBS004R0

DISASSEMBLY

1.

Disconnect sub-harness from fan motor (RH and LH) and cooling fan control module.

2.

Remove cooling fan control module from fan shroud.

CAUTION:

Handle carefully to avoid dropping and shocks.

3.

Remove cooling fan mounting nuts, and then remove the cooling fan (RH and LH).

4.

Remove fan motor (RH and LH).

INSPECTION AFTER DISASSEMBLY
Cooling Fan

Inspect cooling fan for crack or unusual bend.

●

If anything is found, replace cooling fan.

ASSEMBLY

Note the following, and assemble in the reverse order of disassembly.

CAUTION:

RH and LH cooling fans are different. Be careful not to misassemble them.

●

Install each fan in the following position.

●

Secure the sub-harness tightly to the fan shroud to prevent the fan rotation area from being loose.

Right side

: 4 blades

Left side

: 5 blades

CO-24

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WATER PUMP

WATER PUMP

PFP:21020

Components

NBS004R1

Removal and Installation

NBS004R2

CAUTION:

●

When removing water pump assembly, be careful not to get engine coolant on drive belts.

●

Water pump cannot be disassembled and should be replaced as a unit.

●

After installing water pump, connect hose and clamp securely, then check for leaks using the radi-
ator cap tester (commercial service tool) and the radiator cap tester adapter (commercial service
tool).

REMOVAL

1.

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

EM-15, "ENGINE ROOM COVER"

 . 

2.

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

EM-19, "AIR CLEANER AND AIR DUCT"

.

3.

Remove front engine undercover with power tool.

4.

Remove drive belts. Refer to 

EM-16, "DRIVE BELTS"

 .

5.

Drain engine coolant from radiator. Refer to 

CO-11, "Changing Engine Coolant"

 .

CAUTION:

●

Perform this step when the engine is cold.

●

Do not spill engine coolant on drive belts.

6.

Remove water drain plug (front) on water pump side of cylinder
block to drain engine coolant from engine inside.

7.

Remove chain tensioner cover and water pump cover from front timing chain case.

1.

Timing chain tensioner (primary)

2.

Chain tensioner cover

3.

Water pump cover

4.

Water pump

5.

O-rings 

6.

Water drain plug (front)

SBIA0482E

PBIC2662E