DIAGNOSTIC PROCEDURE
NO.21 ENGINE NOISE (MZI-3.7) DIAGNOSTIC PROCEDURE
POSSIBLE CAUSE
z
Generator installation (alignment)
z
Splash shield or under cover looseness (splashed water to drive belts)
Rattle sound noise:
z
Loose parts
Hiss sound noise:
z
vacuum leakage
z
Loose spark plug
z
Air leakage from intake-air system
Rumble or grind noise:
z
Improper drive belt tension
z
Improper P/S fluid level
Rap or roar noise:
z
Dynamic dumper looseness
z
Exhaust system looseness
z
Intake-air system looseness
Other noise:
z
Camshaft friction gear noise or MLA noise
z
Timing chain noise
STEP
INSPECTION
RESULTS
ACTION
1
Is a squealing, click or
chirping sound present?
Yes
Inspect for the followings:
z
Engine oil level
z
Drive belt tension
z
Splash shield or under cover looseness
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:10:05 AM
Page 79
© 2005 Mitchell Repair Information Company, LLC.