OK,

I tackled swaping out my old temp-gauge for a "new" working used one but ran into a rather bad roadblock to completion near the end. I found that the new sensor body thing didn't have a threaded nut that goes over the top to hold it into the block like the last one did. I checked all along the length of the capillary-tube into the dash also. I didn't find one, nor did I remember seing one when I was testing and looking at the whole thing before I even started.

So... my $20-dollar solution may have not been such a solution after all...? I see no way to put the old nut with a hole in it onto the "new" unit to get it to thread into the block and hold it down in there.

I can't figure out how that nut (if it had one?) could have come off this "new" unit, unless the cap-tube was broken before and then fixed, but whoever had it fixed did not include the nut that goes there?

Anybody have any insight into this mystery, or an idea for a solution!?

So close... but no proverbial cigar after contorting upside down for more than a half hour!