Dorman products suck, one reason people change housings so much. They use absolutely crap plastic. I sold enough of them and then warrantied almost all of those very soon after.
Permatex #2 was always gasoline soluble, I used to clean it off parts in the '70s by soaking them in fuel. RTV is too but in a different way, it doesn't dissolve but releases its' grip as it shrivels up into mush. Both seal and survive based on the fact that once pinched in place the solvent can only attack it in a thickness of say 1-2 mils. Even though it dissolves, it would take years to get across the width of the sealing surface.
I have 3 zetecs and haven't changed a housing yet. 39 total years of use there..........
Last edited by amc49; 01-21-2013 at 09:05 PM.