Nissan Altima L32. Manual - part 920

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OIL FILTER

5. After warming up the engine, check for any engine oil leaks.

OIL PUMP

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ON-VEHICLE REPAIR

OIL PUMP

Removal and Installation

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REMOVAL

1. Remove the timing chain. Refer to 

EM-163, "Removal"

.

2. Remove oil pump assembly.

INSTALLATION

Installation is in the reverse order of removal.

Disassembly and Assembly

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CAUTION:

Before assembly apply new engine oil to the parts as shown above.

DISASSEMBLY

1. Remove the oil pump cover.
2. Remove inner rotor and outer rotor from oil pump housing.
3. Remove oil strainer from oil pump housing.
4. After removing regulator plug, remove spring and regulator valve.

INSPECTION AFTER DISASSEMBLY

Clearance of Oil Pump Parts

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1.

Oil pump housing

2.

Outer rotor

3.

Inner rotor

4.

Oil pump cover

5.

O-ring

6.

Regulator valve set

7.

Regulator valve

8.

Spring

9.

Regulator plug

10. Oil strainer

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OIL PUMP

• Measure clearance with feeler gauge.

• Clearance between outer rotor and oil pump body (position 1).

• Tip clearance between inner rotor and outer rotor (position 2).

• Measure clearance with feeler gauge and straightedge.

• Side clearance between inner rotor and oil pump body (position 3).

• Side clearance between outer rotor and oil pump body (position 4).

• Calculate the clearance between inner rotor and oil pump body as follows.
1. Measure the outer diameter of protruded portion of inner rotor

(position A).

2. Measure the inner diameter of oil pump body with inside

micrometer (position B).

(clearance 5) = (inner diameter of oil pump body B) – (outer

diameter of inner rotor A)

Regulator Valve 

1. Visually inspect components for wear and damage.
2. Check oil pressure regulator valve sliding surface and valve

spring.

3. Coat regulator valve with engine oil. Check that it falls smoothly

into the valve hole by its own weight.

If damaged, replace regulator valve set or oil pump body.

Regulator Valve Clearance

Standard

: 0.114 - 0.260 mm (0.0045 - 0.0102 in)

Standard

: Below 0.180 mm (0.0071 in)

SLC932A

Standard

: 0.030 - 0.070 mm (0.0012 - 0.0028 in)

Standard

: 0.050 - 0.110 mm (0.0020 - 0.0043 in)

SLC933A

Standard

: 0.045 - 0.091 mm (0.0018 - 0.0036 in)

SLC934AB

SLC251B

OIL PUMP

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(Clearance 6) = D (Valve hole diameter) – E (Outer diameter of

valve)

If it exceeds the standard, replace the oil pump body.

CAUTION:

Coat regulator valve with engine oil.

Check that it falls smoothly into the valve hole by its own

weight.

Assembly

Assembly is in the reverse order of disassembly.

• Assemble the inner rotor and outer rotor with the punched marks

on the oil pump cover side.

CAUTION:

Before assembly apply new engine oil to the parts as speci-

fied.

Standard

: 0.040 - 0.097 mm (0.0016 - 0.0038 in)

SLC935AA

SLC324B