LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 547 (Symptom Troubleshooting (Engine - L5)) >> No. 21 Engine Noise [L5] >> Notes

No. 21 Engine Noise [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
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
  • Splash shield or under cover looseness (splashed water to drive belts)

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 noise: 
  • Dynamic dumper looseness
  • Exhaust system looseness
  • Intake air system looseness

Other noise: 
  • Tappet noise
  • Timing chain noise