| POSSIBLE CAUSE |
Squeal, click or chirp noise:
- Improper drive belt tension
- Loose installation of solenoid valves
- Improper engine oil level
- Generator installation (alignment)
- Splash shield or under cover looseness (splashed water to drive belt)
Rumble or grind noise:
- Improper drive belt tension
Rattle sound noise:
- Loose parts
Hiss sound noise:
- Air leakage from intake-air system
- Loose spark plug
- Vacuum leakage
Rap or roar sound noise:
- Dynamic damper looseness
- Exhaust system looseness
- Intake-air system looseness
- Variable valve timing actuator malfunction
- Variable tumble actuator improper operation
Other noise:
- Tappet noise
- Timing chain noise
- PCM malfunction
|