Hey bud i recently changed my aux belt, i got the full kit from renault and that little socket hole wasnt up to the job as me and my massively experienced mechanic uncle managed to snap the tensioner housing!! Luckily it didnt break anything essential so as a last resort we put a meaty jubilee clip around the tensioner spring and slowly went about fitting it to the housing, after a little carefull jiggling we got it lined up and screwed it straight in!! All is fine with it as we speak but next time il buy the renault tensioner tool!! Not sure if that helps but just thought id let you know :/