if youve got a vice.. open the jaws just enough so you get a nice tringle effect on the rod between the hammer nad the vice jaws.
now with someone slowly rotating the rod gently and rapidly tap the rod over the seized thread.
do this for about 2 minutes.
now heat the rod with a hot air gun and try to unscrew it. if it didnt work hit it with the spray lube let it cool and try again.

