Radiator drain

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Mustang1964s
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Radiator drain

Post by Mustang1964s » Thu Dec 29, 2022 12:08 pm

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.
RAD Drain.jpg
Does not look good. Just hope I can get a new one with good threads.
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RajoRacer
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Re: Radiator drain

Post by RajoRacer » Thu Dec 29, 2022 12:13 pm

Original was 1/8" pipe.
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Humblej
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Re: Radiator drain

Post by Humblej » Thu Dec 29, 2022 1:14 pm

Same drain as the oil pan, easy to find.
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Rich Eagle
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Re: Radiator drain

Post by Rich Eagle » Thu Dec 29, 2022 1:16 pm

Running a thread die down it might save it. Or even a little silver solder first.
"Just sayin".
When did I do that?
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Mustang1964s
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Re: Radiator drain

Post by Mustang1964s » 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.
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RajoRacer
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Re: Radiator drain

Post by RajoRacer » Thu Dec 29, 2022 1:50 pm

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

Post by speedytinc » Thu Dec 29, 2022 1:55 pm

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.
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Jerry VanOoteghem
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Re: Radiator drain

Post by Jerry VanOoteghem » Thu Dec 29, 2022 2:35 pm

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.
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Mustang1964s
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Re: Radiator drain

Post by Mustang1964s » Thu Dec 29, 2022 3:47 pm

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.
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Allan
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Re: Radiator drain

Post by Allan » Thu Dec 29, 2022 5:36 pm

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.
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Steve Jelf
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Re: Radiator drain

Post by Steve Jelf » Thu Dec 29, 2022 10:56 pm

If you clean up the hole threads with a tap, don't overdo it. You only want to clean up the threads, not cut any new ones.
The inevitable often happens.
1915 Runabout
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George House
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Re: Radiator drain

Post by George House » Fri Dec 30, 2022 7:48 am

and wrap the threads of your new petcock with that plumbers white Teflon tape.
A Fine is a Tax for Doing Something Wrong….A Tax is a Fine for Doing Something RIGHT 🤔
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Mustang1964s
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Re: Radiator drain

Post by Mustang1964s » Fri Dec 30, 2022 9:26 pm

Found a couple from an old oil pan.
80D7B839-3413-4375-B05E-E04ECC0AC291.jpeg
I soaked them in WD40. They seem to move well.
Tomorrow I will check the rad.
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