Hi,my first post. I've got an fiat idea 1.4 16v 2004 and I've just done timing belt and since doing it I noticed a tinny sounding rattle like some thing is loose and vibrating at 2000 rpm till 3000rpm below 2k it's so quiet and smooth tick over,above 3 k it sounds sweet an very responsive but between 2k & 3k rpm sounds like a tin can rattle from inside car while driving but today I set rpm at 2.5k and put my head under bonnet and it sounds like top end of engine rattling around cylinder no4 ? Any ideas ? PS before belt change I didn't notice the rattle sound