the cambelt wouldn't cause it to rattle before hand though would it? and everything in the engine bay looks exactly as it should so im pretty sure it's not the cambelt as that's been replaced in the last 2 years...
i'd rather have the engine rebuilt than buy a replacement and have this happen again, i'll see what the garage say on monday, if it's serious im tempted to fit a 2.0 8v mk3 bottom end as i'll have the engine out anyway