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Old 06-13-2011, 04:36 PM   #2
bobofthenorth
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City: Cowichan Bay, BC
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RE: Changing my heat exchanger zinc, cant get the plug out...help

Heat won't help because it will swell the plug which is counterproductive in this case. Sometimes you can sacrifice a 6-point socket and drive it onto the brass but if its too late for that I'd be thinking dremel tool. My goal would be to take it out in pieces without damaging the threads in the heat exchanger. You do that by cutting the sides of the fitting so that you can then collapse it inward on itself until the pieces fall out. You might be able to do a variation on the sacrificial socket by cutting the head of the plug down to fit a size smaller socket. Whatever you do its going to be a long day.
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