Depends on how old the pump is and if it is leaking. lots of pb blaster and a really good quality easy out will get those suckers out with out harming the pump. I have a set of cobalt bits I use to drill the holes for my easy outs when I have to use them. I learned the hard way on my bike about using cheep easy outs, broke one off in a fender bolt that broke, and it took three days to get the sucker fixed after that.