Infiniti M35/M45 Y50. Manual - part 946

OIL COOLER

LU-15

[VQ35DE]

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OIL COOLER

PFP:21305

Components

NBS004Q1

2WD models

PBIC2403E

1.

Oil filter

2.

Connector bolt

3.

Oil cooler

4.

O-ring

5.

Relief valve

6.

Oil pan (upper) right side

7.

Water hose

8.

Water hose

9.

Water pipe

10.

Water hose

LU-16

[VQ35DE]

OIL COOLER

AWD models

Removal and Installation

NBS004Q2

REMOVAL

WARNING:

Be careful not to get burn yourself, as engine oil and engine coolant may be hot.
NOTE:
When removing oil cooler only, step 2 is unnecessary.

1.

Remove front engine undercover with power tool.

2.

Drain engine coolant from radiator and cylinder block. Refer to 

CO-11, "Changing Engine Coolant"

 and

EM-125, "DISASSEMBLY"

 .

NOTE:
Perform this step when removing water pipes.

3.

Disconnect water hoses from oil cooler.

●

When removing oil cooler only, pinching water hoses near oil cooler to prevent engine coolant from
spilling out.

●

Remaining engine coolant in piping will come out. Use a tray to collect it.

CAUTION:

●

Perform this step when the engine is cold.

●

Do not spill engine coolant on drive belts.

4.

Using oil filter wrench [SST: KV10115801 (J38956)], remove oil filter. Refer to 

LU-11, "OIL FILTER"

 .

CAUTION:

Do not spill engine oil on drive belts.

5.

Remove connector bolt, and remove oil cooler.

PBIC3392E

1.

Oil filter

2.

Connector bolt

3.

Oil cooler

4.

O-ring

5.

Relief valve

6.

Oil filter bracket

7.

Water hose

8.

Water hose

9.

Water pipe

10.

Water hose

OIL COOLER

LU-17

[VQ35DE]

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CAUTION:

Do not spill engine oil to rubber parts such as drive belts and engine mounting insulator.

6.

Remove water pipes, as necessary.

INSPECTION AFTER REMOVAL
Oil Cooler

Check oil cooler for cracks. Check oil cooler for clogging by blowing through engine coolant inlet. If necessary,
replace oil cooler.

Relief Valve

Check relief valve with the following procedure.

●

Press steel ball of relief valve using a clean plastic stick. Make sure that valve moves smoothly and proper
spring repulsion is felt.

●

Replace relief valve, if necessary, with the following procedure.

–

Remove the relief valve by prying using a screwdriver.

CAUTION:

Be careful not to damage the mounting hole.

–

Press in the relief valve until it reaches a depth of 7 mm (0.28 in) from end surface of oil pan (upper) using
approximately 10 mm (0.39 in) diameter drift.

CAUTION:

Carefully press in the relief valve by aligning its mounting hole side with the axle center so as not
to cause deformation.

INSTALLATION

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

●

Make sure that no foreign objects are adhering to the installation planes of oil cooler, oil pan (upper) (2WD
models) or oil cooler bracket (AWD models).

2WD Models

Align cutout on oil cooler with protrusion on oil pan (upper) side, and
tighten connector bolt.

AWD Models

Align cutout on oil cooler with protrusion on oil cooler bracket side, and tighten connector bolt.

INSPECTION AFTER INSTALLATION

1.

Check the engine oil level and the engine coolant level and add engine oil and engine coolant. Refer to

LU-7, "ENGINE OIL"

 and  

CO-11, "ENGINE COOLANT"

 .

2.

Start the engine, and check there is no leaks of engine oil or engine coolant.

SBIA0459E

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: Connector bolt

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:  Cut  out

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:  AWD

PBIC3391E

LU-18

[VQ35DE]

OIL COOLER

3.

Stop the engine and wait for 10 minutes.

4.

Check the engine oil level and the engine coolant level again. Refer to 

LU-7, "ENGINE OIL"

 and 

CO-11,

"ENGINE COOLANT"

 .