Infiniti FX35, FX50 (S51). Manual - part 1355

OIL PUMP

LU-17

< UNIT DISASSEMBLY AND ASSEMBLY >

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UNIT DISASSEMBLY AND ASSEMBLY

OIL PUMP

Exploded View

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Disassembly and Assembly

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DISASSEMBLY

1.

Remove oil pan (lower) and oil strainer. Refer to 

EM-46, "Exploded View"

.

2.

Remove oil pan (upper). Refer to 

EM-100, "2WD : Exploded View"

 (2WD models) or 

EM-103, "AWD :

Exploded View"

 (AWD models).

3.

Remove front timing chain case and timing chain (primary). Refer to 

EM-53, "Exploded View"

.

4.

Remove oil pump assembly.

5.

Remove oil pump cover.

6.

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

7.

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

ASSEMBLY

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

CAUTION:

Before assembly, apply new engine oil to the parts as instructed in the figure.
• Install oil pump inner rotor with the groove faced to oil pump cover

side.

• When installing oil pump, align crankshaft flat faces with oil pump

inner rotor flat faces.

1.

Oil pump body

2.

Oil pump outer rotor

3.

Oil pump inner rotor

4.

Oil pump cover

5.

Regulator valve plug

6.

Regulator valve spring

7.

Regulator valve spring

8.

Regulator valve

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA0242GB

A

: Oil pump body side

B

: Oil pump cover side

C

:  Groove

JPBIA0084ZZ

LU-18

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OIL PUMP

Inspection

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INSPECTION AFTER DISASSEMBLY

Oil Pump Clearance

• Measure the clearance with feeler gauge (C).
- Clearance between oil pump outer rotor and oil pump body [posi-

tion (B)]

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

rotor [position (A)]

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

[position (C)]

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

[position (B)]

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

OIL PUMP BODY INNER DIAMETER

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

ter. [position (A)]

OIL PUMP INNER ROTOR OUTER DIAMETER

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

rotor (1) with micrometer. [position (B)]

OIL PUMP INNER ROTOR TO OIL PUMP BODY CLEARANCE

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

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

Regulator Valve Clearance

Standard

: Refer to 

LU-20, "Oil Pump"

.

Standard

: Refer to 

LU-20, "Oil Pump"

.

JPBIA0078ZZ

Standard

: Refer to 

LU-20, "Oil Pump"

.

Standard

: Refer to 

LU-20, "Oil Pump"

.

JPBIA0079ZZ

JPBIA0080ZZ

Standard

: Refer to 

LU-20, "Oil Pump"

.

OIL PUMP

LU-19

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(Clearance) = (Regulator valve hole diameter) – (Regulator valve
outer diameter)

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

assembly.

CAUTION:

• Coat regulator valve with engine oil.
• Check that it falls smoothly into valve hole by its own weight.

INSPECTION AFTER INSTALLATION

1.

Check the engine oil level. Refer to 

LU-6, "Inspection"

.

2.

Start the engine, and check there is no leakage of engine oil.

3.

Stop the engine and wait for 10 minutes.

4.

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

LU-6, "Inspection"

.

1

: Regulator valve

2

: Oil pump body

Standard

: Refer to 

LU-20, "Regulator Valve"

.

JPBIA0081ZZ

LU-20

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Periodical Maintenance Specification

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ENGINE OIL CAPACITY (APPROXIMATELY)

Unit: 

 (US qt, lmp qt)

Engine Oil Pressure

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Unit: kPa (kg/cm

2

, psi)

*: Engine oil temperature at 80

°

C (176

°

F)

Oil Pump

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Unit: mm (in)

Regulator Valve

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Unit: mm (in)

Drain and refill 

With oil filter change

4.9 (5-1/8, 4-1/4)

Without oil filter change

4.6 (4-7/8, 4)

Dry engine (Overhaul)

5.7 (6, 5)

Engine speed  

Approximate discharge pressure* 

Idle speed

More than 98 (1.0, 14)

2,000 rpm

More than 294 (3.0, 43) 

Oil pump body to oil pump outer rotor radial clearance

0.114 - 0.260 (0.0045 - 0.0102)

Oil pump inner rotor to oil pump outer rotor tip clearance

Below 0.180 (0.0071)

Oil pump body to oil pump inner rotor axial clearance

0.030 - 0.070 (0.0012 - 0.0028)

Oil pump body to oil pump outer rotor axial clearance

0.030 - 0.090 (0.0012 - 0.0035)

Oil pump inner rotor to brazed portion of housing clearance

0.045 - 0.091 (0.0018 - 0.0036)

Regulator valve to oil pump cover clearance

0.040 - 0.097 (0.0016 - 0.0038)