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Old 04-22-2021, 10:55 AM   #9
JayJay
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Join Date: Jan 2020
Location: SF Bay Area
Posts: 1,079
Default Re: Zenith Rebuilding

Quote:
Originally Posted by Tom Endy View Post
I would avoid drilling it out as you can easily damage the threads. I have removed many with an easy technique. Take a torch and heat the area around the secondary well until it glows red, then drop it in a bucket of cold water. It will then easily unscrew.

Tom Endy
Thanks, Tom, I'll try that technique next time I have the opportunity. Thermal shock is a good technique to have in your bag of tricks for loosening stuck "things". I agree, drilling out is not to be undertaken without a thorough understanding of what you're doing, plus a good stable machine tool setup. I didn't put in my description that I also verified x- and y- flat, to assure perpendicularity of the drill to the casting, before I began drilling. Your way is quite a bit simpler.

JayJay
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JayJay
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1930 Murray Town Sedan
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