G8 V6-3.6L (2008)
operation.
Drive Belt Rumbling and Vibration Diagnosis (Vibration)
Drive Belt Rumbling and Vibration Diagnosis (Vibration)
Diagnostic Aids
The accessory drive components can have an affect on engine vibration. Such as, but not limited to, the A/C system over charged, the power steering
system restricted or the incorrect fluid, or an extra load on the alternator. To help identify an intermittent or an incorrect condition, vary the loads on the
accessory drive components.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This test is to verify that the symptom is present during diagnosing. Other vehicle components may cause a similar symptom such as the exhaust
system, or the drivetrain.
3. This test is to verify that the drive belt or accessory drive components may be causing the vibration. When removing the drive belt the water pump
will not be operating and the engine may overheat. Also DTCs may set when the engine is operating with the drive belt removed.
4. The drive belt may cause a vibration. While the drive belt is removed, this is the best time to inspect the condition of the belt.
6. Inspecting of the fasteners can address the possibility that a wrong bolt, nut, spacer, or washer was installed.
8. Inspect the water pump shaft for being bent. Also, inspect the water pump bearings for smooth operation and play above acceptable tolerances.
Compare the water pump with a known good water pump.
9. Accessory drive component brackets that are bent, cracked, or loose may put extra strain on that accessory component causing it to vibrate.