> Sorry to say mate, it sound like something serious inside the engine. If
> first mechanic said main pulley then ask him to guarantee that and get it
> For sure its not normal, so whatever you do get it fixed or else wait for
> big bang which might cost a fortune to fix. My friend car serpentine belt
> broke and snapped the radiator shroud, radiator fan blade and made big dent
> in radiator. Total repair cost was 1200 dhs for 80 dhs serpentine belt that
> didnt changed by him in time.
Thanks Kazi.. But one more thing, when i switch on Air Conditioner(AC), the noise increases .... do u have any clue?