Editing Removing stuck fasteners (section)
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==Temperature differential== ===Freezing=== Loctite makes a product called [http://loctitefreezeandrelease.com/instructions.htm Freeze and Release] that may work for certain situations. It's basically a sub zero spray that freezes on contact. ===Hot and cold=== This method uses alternating heating and cooling. The resulting expansion and contraction is thought to break a fastener loose from the grip of rust. #With a welding torch, a hand-held propane torch, or a combination MAPP gas/oxygen torch kit, heat up a bolt head until it turns red. #While it's still red-hot, squirt it with water. #Repeat the heating and cooling process again with the torch and water. *When using the "Hot and cold" method be sure to follow proper safety procedures, specifically: **Wear proper safety attire including welder's gloves and safety goggles. **As with any time you use any flammable ignition sources, have a fire extinguisher within arm's reach. If you use any type of penetrating oils they should be removed thoroughly first, they tend not to let the water do its thing when the hot and cold method is used. Remember- heat, and '''then''' use the water. Do this several times. Too much heat will destroy the temper of a fastener. Important fasteners like used on the suspension, steering and brake systems should be replaced if there is any question as to the condition. ===Heat the nut method=== Heat the '''nut''' with a torch until red hot, cool the bolt with a good shot of spray-on rust remover then remove the nut while still hot. Heating the nut thermally expands it, while the rust remover (which is a refrigerant) thermally contracts the bolt. Be careful and use gloves as the nut and your wrench will be hot. ===The heat and paraffin wax method=== #Heat the bolt with a torch. #Touch the threads with paraffin wax. Ensure that the bolt is situated such that the wax will run down into the mating threads. #Remove the bolt.
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