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No. 21 Engine Noise: Notes
ENGINE NOISE POSSIBLE CAUSE DESCRIPTION
| 21 |
Engine noise |
| DESCRIPTION |
- Engine noise from under hood.
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| POSSIBLE CAUSE |
Squeal, click or chirp noise:
- Improper engine oil level.
- Improper drive belt tension.
Rattle sound noise:
Hiss sound noise:
- Vacuum leakage.
- Loose spark plug.
- Air leakage from intake-air system.
Rumble or grind noise;
- Improper drive belt tension.
Rap or roar sound noise:
- Exhaust system looseness.
Other noise:
- Camshaft friction gear noise or HLA noise.
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