Just checked, my 120A alternator 0123515014 does not have a one way clutch so eliminating that possibility! :unsure: well thats good then. i wasnt being sarky m8,just know how you are from the forum,but if as you say your getting OLD then i can see your reasoning. re reading your 1st post about noise,does it remind you of the aircon pulley noise? read up on it and see if it is??