I have removed stainless steel tank screws on a Cherokee 140. They had been
in place for about 10 years. On probably half, I bunged up the heads to a
point that I did not want to reuse them. In the scheme of things, cost of
new screws is a pittance. Save yourself some aggravation and buy a new set.


When I took them out the first time, I fouled up NONE. Must have been
good luck. Maybe it has something to do with years of experience in body
work fixing rusted Midwestern cars. You learn exactly how much force you
need for a given fastener (or you spend a lot of time fixing broken
bolts and screws).

I used a clutchless Black&Decker commercial cordless screwgun with a new
bit. I actually had a couple of booster steps that I stood on so I could
put my entire weight on the drill. I put the bit in place, leaned on it,
and hit the trigger. Every one snapped loose without stripping or
breaking. I saved them all. So, when I R&R the right tank, I have plenty
of extras.

Thanks to all,
Mike