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Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
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I just went out and looked at some old OEM units that came off a '73 and they have the same gap you report. The new SSI's which replaced them have a much tighter fit to a sleeve like cuff on the tin of the outer jacket. The OEM unit leaks some air but cheaper to manufacture (looser tolerances) and no concern about differential thermal expansion over stressing the joints. Cheers, Jim
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