Stubborn Valve Seats & Screw Extractors
 

Maybe 3 weeks ago, a number of people suggested using a screw extractor to
remove a stuck valve seat. Whoever it was, THANK YOU! It worked like a
charm. What a cool tool! The face of the valve seat was hacked up all the
way back to the rim. It would've been pointless to try grinding it flat -
there wasn't much left to grind.