Quote:
Originally Posted by Steam Driver
How much heat can be safely applied? Map torch, or red hot w/acetylene?
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I suggest using a propane torch. Map and acetylene can also be used, but if inexperienced, one can overheat and melt metal. Heat the female part to a dull red (if steel). Be aware of surrounding areas, another reason to perform this off the car.
This video stresses torch safety as much as anything.
Apply penetrating oil to the threaded joints as the parts expand from heat. Let cool slightly from the red hot state, then attempt to loosen. Repeat as needed. Always use two wrenches to avoid distorting tube connections. Patience is required here.
If hopelessly petrified, as is often the case with exhaust fasteners, you can always resort to slicing the female hex with a Dremel abrasive disc or equiv. to loosen its grip on the male thread. Again, use penetrating oil.
Sherwood