The 'Double Nut' method of Stud removal is a very good one, I use it very often on just about all studs, perfect way to get them out or in with no damage at all.
However, and I have no answer as to why, but these particular long studs I've never had success removing them by this method. I may well have been the ham fisted guy on our lines fitting them in such a way, by all means, try the double nut method first. I think the factory also used a sealant on these threads as the holes do go through to the inside of the crankcase.
When I fit the studs in these holes and also those for the fuel pump, I do use a sealant on the threads, if for no other reason than insurance.
For when I try this out tomorrow, do you go clockwise (looking towards the engine, just like in the pictures above) to remove the stud?
I've watched a few videos, and some release clockwise and others go counter.
