Nissan Altima 2007-2012 Service Manual: Oil pump

Removal and Installation

• The oil pump is part of the front cover. For removal and installation of the oil pump, it is necessary to remove and install the front cover. Refer to EM-52, "Removal and Installation".

Disassembly and Assembly

1. Front cover

2. Outer rotor

3. Inner rotor

4. Oil pump cover

5. Regulator valve

6. Spring

7. Regulator plug

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 front cover.

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

INSPECTION AFTER DISASSEMBLY

Measure the clearance of the oil pump parts to check they are within specification.

1. Measure clearance with feeler gauge as follows: • Clearance between outer rotor and oil pump body (position 1).

Standard : 0.114 - 0.179 mm (0.0045 - 0.0070 in)

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

Standard : 0.170 - 0.220 mm (0.0067 - 0.0087 in)

2. Measure clearance with feeler gauge and straightedge as follows: • Side clearance between inner rotor and oil pump body (position 3).

Standard : 0.030 - 0.070 mm (0.0012 - 0.0028 in)

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

Standard : 0.060 - 0.110 mm (0.0024 - 0.0043 in)

3. Calculate the clearance between inner rotor and oil pump body as follows: • Measure the outer diameter of protruded portion of inner rotor (Position 5).

• Measure the inner diameter of oil pump body with inside micrometer (Position 6).

• (Clearance) = (Inner diameter of oil pump body) – (Outer diameter of inner rotor).

Standard : 0.035 - 0.070 mm (0.0014 - 0.0028 in)

4. Calculate regulator valve clearance as follows: • (Clearance) = D1(Valve hole diameter) – D2 (Outer diameter of valve)

Standard : 0.040 - 0.097 mm (0.0016 - 0.0038 in)

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.

• Install 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 specified.

    On-vehicle repair
    ...

    Oil cooler
    Removal and Installation 1. Oil pressure switch 2. Oil cooler 3. Gasket 4. Water hose (outlet) 5. Water hose (inlet) A. To water control valve housing B. To heater pipe assembly C. Hose clam ...

    Other materials:

    On board diagnostic (OBD) System
    Diagnosis Description DESCRIPTION The CVT system has two self-diagnostic systems. The first is the emission-related on board diagnostic system (OBD-II) performed by the TCM in combination with the ECM. The malfunction is indicated by the MIL (malfunction indicator lamp) and is stored as a ...

    Warning lamp
    Description • Warning lamp is built in combination meter. • Intelligent Key system malfunction is reported to the driver by the warning lamp illumination. Component Function Check 1.CHECK FUNCTION 1. Perform “INDICATOR” in the “Active Test” mode with CONSULT-III. 2. Check wa ...

    Heater & cooling unit assembly
    Removal and Installation COMPONENTS 1. Steering member 2. Heater and cooling unit 3. Blower unit REMOVAL 1. Discharge the refrigerant from the A/C system. Refer to HA-24, "HFC-134a (R-134a) Service Procedure". 2. Drain the engine coolant from the cooling system. Refer to CO-1 ...