ive got a vectra b made on the 27th march 2002, the logbook says that my engine number is 11060351 and i know vauxhall started changing to the new style belt at engine number 1106400, the service history i got with the car says nothing to help me, are there any tell tale signs that the work has been done? if i went to a vauxhall carage could they tell me? i here no diesel like sounds or any strange noises what so ever,