No. 21 Engine Noise: Notes
POSSIBLE CAUSE DESCRIPTION CHART
| 21 |
ENGINE NOISE |
| DESCRIPTION |
Engine noise from under hood |
| POSSIBLE CAUSE |
Squeal, click or chirp noise:
- Improper engine oil level
- Improper drive belt tension
- Generator installation (alignment)
- Splash shield or under cover looseness (splashed water to drive belts)
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
- Improper P/S fluid level
Rap or roar noise:
- Dynamic dumper looseness
- Exhaust system looseness
- Intake air system looseness
Other noise:
- Camshaft friction gear noise or MLA noise
- Timing chain noise
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