MTFCA Forum

Well, the Rad drain only stops dripping when enough rust has built up.
Having drain the T for the winter, I pulled the drain.
This is what came off. Now I need to know what the thread size that I should use for the new one.
Does not look good. Just hope I can get a new one with good threads.

Original was 1/8" pipe.

Same drain as the oil pan, easy to find.

Running a thread die down it might save it. Or even a little silver solder first.
"Just sayin".

I need one that does not leak.
Unless there is a way that to rebuild this one, so it does not leak.

Lang's carries an excellent original style petcock - https://www.modeltford.com/item/3079.aspx

Mustang1964s wrote: ↑

Thu Dec 29, 2022 1:40 pm

I need one that does not leak.
Unless there is a way that to rebuild this one, so it does not leak.

Take it apart & lap with tooth paste.

If it were the original style it might be fun to repair it, but it's not, so I would just replace it the new one from Lang's.

That's what I am thinking.
Get a new one and run a tap thru the threads.
Keep fingers crossed that the rad is not messed up.

That tap looks more like a carburetor drain cock. The pan oil taps are the same as the radiator drain cock, as others have indicated. I would run a tap in the radiator outlet before fitting any replacement. Something has damaged the thread on your draincock and it may be a damaged thread in the outlet.
.
Allan from down under.

and wrap the threads of your new petcock with that plumbers white Teflon tape.

Found a couple from an old oil pan. I soaked them in WD40. They seem to move well.
Tomorrow I will check the rad.