Removing C.I. rad bungs

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different sized top bungs on C.I rads on feet to remove(on a HW system), to allow the addition of Trv`s. I rented a mobile compressor, and 1" drive impact gun. Did like Gerry and Steve suggested, tighten a bit first, then remove. My guy had a bit of trouble at first differentiating left from right hand threads, but after the first few, he got it. Long story short,,I only had to cut-out 5 the "hard way", not bad!<BR> Thanks guys, this sure saved me alot grief on this job! <BR><BR>Dave