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Home >> Mazda >> 2013 >> 2 Touring, 1.5L Eng VIN Z, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [Engine Control System MZR 1.5] >> No.21 Engine Noise >> Notes

No.21 Engine Noise: Notes

CONDITION DESCRIPTION & POSSIBLE CAUSE

21  ENGINE NOISE 
DESCRIPTION 
  • Engine noise from under hood.
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