No. 21 Engine Noise: Notes
NO. 21 ENGINE NOISE DESCRIPTION AND POSSIBLE CAUSE
| 21 |
ENGINE NOISE |
| DESCRIPTION |
- Engine noise from under hood.
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| POSSIBLE CAUSE |
Squeal, click or chirp noise:
- Improper engine oil level
- Loose installation of solenoid valves
- Improper drive belt tension
- Generator mis-installation
- Splash shield or under cover loose (splashed water to drive belts)
Rumble or grind noise:
- Improper drive belt tension
- Loose parts
Rattle sound noise:
Hiss sound noise:
- Air leakage from intake air system
- Loose spark plug
- Vacuum leakage
Rap or roar noise:
- Dynamic dumper loose
- Exhaust system loose
- Intake air system loose
- Variable valve timing actuator malfunction
- Variable tumble control system malfunction
Other noise:
- Tappet noise
- Timing chain noise
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