Leaking Thermostat Housing. Thinking on billet with O Ring

JB Weld is good stuff. I bet it works fine.
Yes it is... there are better hi-temp epoxies and specialized products but for something like a t-stat housing it's great.

I've had to modify my buying habits since I sold my big truck and retired... even though I still work 70 hours per week at age 68 I still have a mortgage and can't live on my SS income.

Lost all my 401k $$$ in a dot com drop.

So I have to watch my pennies when doing my car projects... 30 years ago I'd just open my wallet and buy new. But I come from an era when we FIXED things... didn't just toss a worn part in the trash. I learned from the old timers about saving what's still good (maybe that explains the accumulation of 'stuff' I have!). What makes a decision easier for me is the country of origin label... experience has shown me what works and what doesn't.

Carry on...