How to Tighten Your Cylinder Head Studs - in Sequence
Ed HughesWhen tightening and untightening cylinder head nuts, work out from the centre in a spiral to ensure minimal stress is put on the cylinder head.
You'll notice I'm working my way out from the center here. There is usually a pattern to tightening and un-tightening cylinder head nuts. And the general thing is to work your way out from the middle because that just does it in such a way that the minimum stress, the minimum flexing is applied to the head as it comes off, it just comes off very gradually then.