Hi yes it happened on my 100 series, it sounded just like a slipping fan belt , so checked and changed all belts but no differance. Have a freind with a 80 series and he had same prob , his mechanic diagnosed a tiny leak in the turbo gasket, changed the gaskets and all ok . I didn,t change mine as I traded the vehicle in on a 200. I suggest taking it to a proffessional turbo centre and let them listen , if it sounds like a screaming fan belt then let them know that it may be a leaky gasket , but I would get it fixed. Cheers Graham Thanks mate will get that checked asap. Cheers Trent