Infiniti FX35 / FX45. Manual - part 829

LU-28

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OIL COOLER

6.

Remove water pipe, 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 for movement, cracks and breaks by pushing the ball. If replacement is necessary, remove
relief valve by prying it out with suitable tool. Install a new valve in place by tapping it.

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 or oil pan. 
• Tighten connector bolt after aligning stopper on the oil pan side

with protrusion of oil cooler.

INSPECTION AFTER INSTALLATION

1.

Make sure level of engine oil and engine coolant, and adjust engine oil and engine coolant. Refer to 

LU-

23, "Inspection"

 and 

CO-37, "Inspection"

.

2.

Start engine, and make sure there is no leak of engine oil or engine coolant.

3.

Stop engine and wait for 15 minutes.

4.

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

LU-23, "Inspection"

 and 

CO-37,

"Inspection"

.

PBIC1527E

OIL PUMP

LU-29

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OIL PUMP

Component

INFOID:0000000001325834

Removal and Installation

INFOID:0000000001325835

REMOVAL

1.

Remove engine assembly from vehicle. Refer to 

EM-237, "Component"

.

2.

Remove front cover. Refer to 

EM-199, "Component"

. 

3.

Remove oil pump drive spacer.
• Set bolts in the two bolt holes [M6 

×

 pitch 1.0 mm (0.04 in)] on

the front surface. Using suitable puller, pull oil pump drive
spacer off from crankshaft.
NOTE:
The dimension between the centers of the two bolt holes is 33
mm (1.30 in).
In the figure, a commercial steering puller is used.

4.

Remove oil pump.

INSTALLATION

1.

Install the oil pump.

2.

Install oil pump drive spacer as follows:

1.

Oil pump body

2.

Oil pump outer rotor

3.

Oil pump inner rotor

4.

Oil pump cover

5.

Oil pump drive spacer

6.

Regulator valve

7.

Regulator valve spring

8.

Regulator valve plug

PBIC1592E

PBIC0054E

LU-30

< SERVICE INFORMATION >

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OIL PUMP

a.

Insert oil pump drive spacer according to the directions of crank-
shaft key and the two flat surfaces of oil pump inner rotor. 
• If the positional relationship does not allow the insertion, rotate

oil pump inner rotor with a finger to allow spacer.

b.

After confirming that the position of each part is in correct condi-
tion to allow for spacer, force fit spacer by lightly tapping with
plastic hammer until it contacts and does not go further. 

3.

Install in the reverse order of removal after this step.

INSPECTION AFTER INSTALLATION

1.

Check the engine oil level. refer to 

LU-23, "Inspection"

.

2.

Start engine, and check there is no leak of engine oil.

3.

Stop engine and wait for 15 minutes.

4.

Check the engine oil level and adjust engine oil. Refer to 

LU-23, "Inspection"

.

Disassembly and Assembly

INFOID:0000000001325836

DISASSEMBLY

1.

Remove oil pump cover.

2.

Remove oil pump inner rotor and oil pump outer rotor from oil pump body. 

3.

After removing regulator valve plug, remove regulator valve spring and regulator valve.

INSPECTION AFTER DISASSEMBLY 

Oil Pump Clearance

• Measure the clearance with feeler gauge.
- Clearance between oil pump outer rotor and oil pump body (Posi-

tion 1)

- Tip clearance between oil pump inner rotor and oil pump outer

rotor (Position 2)

• Measure the clearance with feeler gauge and straightedge.
- Side clearance between oil pump inner rotor and oil pump body

(Position 3)

- Side clearance between oil pump outer rotor and oil pump body

(Position 4)

• Calculate the clearance between oil pump inner rotor and oil pump body as follows:

OIL PUMP INNER ROTOR OUTER DIAMETER

PBIC0058E

Standard

: 0.114 - 0.200 mm (0.0045 - 0.0079 in)

Standard

: Below 0.180 mm (0.0071 in)

PBIC0139E

Standard

: 0.030 - 0.070 mm (0.0012 - 0.0028 in)

Standard

: 0.030 - 0.090 mm (0.0012 - 0.0035 in)

PBIC0140E

OIL PUMP

LU-31

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- Measure the outer diameter of protruded portion of oil pump inner

rotor with micrometer. (Position 5)

OIL PUMP BODY INNER DIAMETER

- Measure the inner diameter of oil pump body with inside microme-

ter. (Position 6)

OIL PUMP INNER DIAMETER TO OIL PUMP BODY CLEARANCE

- (Clearance) = (Oil pump body inner diameter) – (Oil pump inner rotor outer diameter)

• If the measured/calculated values are out of the standard, replace oil pump assembly.

Regulator Valve Clearance

(Clearance) = D

1

(Valve hole diameter) – D

2

(Regulator valve outer

diameter of valve)

• If the calculated value is out of the standard, replace oil pump

assembly.

CAUTION:

• Coat regulator valve with engine oil.
• Make sure that it falls smoothly into regulator valve hole by its

own weight.

ASSEMBLY

Note the following, and assemble in the reverse order of disassembly.
• Install oil pump inner rotor and oil pump outer rotor with the

punched marks on the oil pump cover side.

PBIC0141E

PBIC0142E

Standard

: 0.045 - 0.091 mm (0.0018 - 0.0036 in)

Standard

: 0.040 - 0.097 mm (0.0016 - 0.0038 in)

PBIC0143E

PBIC0144E