Nissan Altima 2007-2012 Service Manual: Function diagnosis

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting - Engine Noise

1. Camshaft bearing noise


1. Camshaft bearing noise

2. Piston pin noise

3. Piston slap noise

4. Main bearing noise

5. Connecting rod bearing noise

6. Drive belt noise (Sticking/Slipping)

7. Drive belt noise (Slipping)

8. Water pump noise

9. Timing chain and chain tensioner noise

10. Tappet noise

A. Valve

B. Valve mechanism

C. Rotation mechanism

D. Drive belt

E. Timing chain

Use the Chart Below to Help You Find the Cause of the Symptom

1. Locate the area where noise occurs.

2. Confirm the type of noise.

3. Specify the operating condition of engine.

4. Check specified noise source. Repair or replace the identified part as necessary.

A: Closely related


A: Closely related

B: Related

C: Sometimes related —: Not related

    Preparation
    Special Service Tool The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here. Commercial Service Tool ...

    Other materials:

    Positive crankcase ventilation
    Description This system returns blow-by gas to the intake manifold. The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the ...

    P2138 APP Sensor
    Description The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position and sends a signal to the ECM. Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which tr ...

    Passenger seat belt warning system
    System Diagram System Description The seat belt warning lamp (1) will remind the driver if the driver or front passenger seat belt should be buckled. The system works in conjunction with the occupant classification system. Refer to SRC- 10, "Occupant Classification System (OCS)". ...