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Hello, Steve.
I'm sorry to hear you had so much trouble with these.
I can recall having some veery tight head nuts, but obviously never the trouble you had.
It is not unusual for the whole stud to come out with the nut still attached eitherIf the nuts rounded iside ..this suggests they were previously damaged..this has never happened to me.
I do use a soaking with plus gas or a special industrial goop I was given ..but mostly its just steady turning with a 2 foot bar..
Exhaust s are a whole'nother story...gas axe is often the most cost-effective..then weld a nut onto the stud and heat the head 'till the fins just start to melt, bathe with paraffin wax, reheat etc..
I reckon to get 10 out 0f every 12 out,,...drill the other two..
Kind regards
David
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