Hi guys sorry i didn't get back sooner. If your still interested, I managed to replace the bearing no problem at all. what you do is... remove the tensioner from the engine. remove the pulley from the tensioner (the thread on the bolt through the pulley is reverse thread so undo it in a clockwise direction) . now on both sides of the bearing itself there is a plastic ridge in the pulley (if you can understand that!) you need to take a sharpe Stanley blade and carve one side away allowing you to press out your old one and press in your new one. i used a crap vice a bit of wood and some ol