Forkliftt wrote:When you hit the chisel you want to cut most of the way through- but not quite. If you damage the face below the washer you may never get it to seal again.
Ya, no kiddin!* New head time.* I think I might leave that method until last resort.* I'd try to get a hook tool under the lip of the washer that's hopfully in the center bore.* Just don't scrape the head any.* A bolt threaded into the washer is good too, then pry the head with a screwdriver, and perhaps a piece of wood as a fulcrum point.* Once you get it to move just a bit, it should loosen right up.* ................Arctic Traveller