When undoing stubborn nuts (particularly the exhaust manifold nuts) regularly check if the nut/stud you are undoing is getting hot. If it is, let it cool and move onto the next one. The studs are much more likely to shear as they get hot (thanks to my mate Si "Skyline" Harrison for all the advice - his car: www.cix.co.uk/~mgutkowski/sisky.jpg - 400hp from a 1986 2.0 litre single turbo - he thinks the PRV is pathetic) Martin #1458