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Home >> Mazda >> 2005 >> MPV ES >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting (Engine Control System) AJ >> No.21 Engine Noise >> Notes
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No.21 Engine Noise: Notes

ENGINE NOISE - DESCRIPTION AND POSSIBLE CAUSE

21 Engine noise
DESCRIPTION 
  • Engine noise from under hood
POSSIBLE CAUSE  Squeal, click or chirp noise: 
  • Improper engine oil level
  • Improper drive belt tension

Rattle sound noise: 
  • Loose parts

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