I can hear an occasional rattle from the pulley\belts every so often. A chap I know said it was the air con pulley - he pushed it side to side with the engine off & I could hear the clunk. He said the rubber thingies inside had gone and either repair\bodge them or new pulley. After searching the forum, it came down to a new pulley. Found the guy on eBay who is selling them out of Germany for 80 quid delivered. Was about to buy one but after a bit more searching - I found a supplier of the rubber (cush drive) rubbers. https://www.ebay.co.uk/itm/A-C-COMP...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649 Ordered on a Sunday & arrived on a Friday. Now just need to fit them. LOL There was a link to some company in Ireland on a previous thread - but the website is dead. Thought the link might help someone out.