"SITUATION:
A ‘CLATTERING’ NOISE MAY BE HEARD FROM THE ENGINE. UPON FURTHER INVESTIGATION, INCLUDING REMOVING THE
SUPERCHARGER DRIVE BELT AND RUNNING THE ENGINE TO CONFIRM THE NOISE IS NO LONGER PRESENT, THE NOISE MAY BE FOUND
TO BE COMING FROM THE SUPERCHARGER ASSEMBLY.
CAUSE: THIS MAY BE CAUSED BY THE FOLLOWING CONDITIONS:
• THE TORSIONAL ISOLATOR SPRING MAY FAIL DUE TO LACK OF ADEQUATE INPUT SHAFT PILOT SUPPORT, LEADING TO
OVERHANG AND INCREASED STRESSES IN THE TORSION SPRING AND CAUSING EXCESSIVE BACKLASH IN THE
SUPERCHARGER DRIVE AND NO TORSIONAL DAMPING.
• BEARING CONTAMINATION."
