Epoxy isnt glue in the traditional sense. I highly doubt that you could heat an engine application epoxy hot enuf to remove it as you can with some glue.
I was able to the epoxy off the tabs but not much luck with the runners. I read some where that you cuold put it in the oven on 450F for a hour or so and that will work. This heat gun is is able to get it to about 250C so I thought it might be hot enough.