Nissan Altima 2007-2012 Service Manual: Function diagnosis


NVH Troubleshooting - Engine 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

B: Related

C: Sometimes related —: Not related

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