Originally Posted by ZKindaGuy

Yea I always use a propane torch to loosen bolts. I first heat the bolt then spray some Liquid Wrench on the exposed services and walk away for a half-hour. As the bolt cools it sucks in the Liquid Wrench in the thread area. When I come back in a half hour the bolt will loosen right out with just minor resistence. Has always worked for me for over 30 years.