Smelt burning plastic.. !Removed! aircon belt jumped and the tensioner pulley drilled into the timming belt cover- I actually pulled the half melted pully out and then found the bearing bolt in the timming chain.. now all cleaned up and the hole is coverd neatly.. I cut up a black shampoo bottle, left it in boiling water to go flat and cut to shape and glued on! - serviced the car for winter too and it's running sweet' near miss and I guess aircon won't Be needed for a while' - I think il string measure a new belt and by pass a pully tensioner!