well that might explain it cheers mr italy, i might get someone to take a look at it
ive also noticed that on my exhaust manifold there was a snapped stud (the last stud which is closest to the firewall), and the nut and half the stud fell out today upon further inspection... so now the other half of the stud is in there, i plan to fix that asap but i doubt its related as i dont have a exhaust leak, just a whining sound