Stuck Radiator Drain Plug

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Dave.49.cub
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Stuck Radiator Drain Plug

Postby Dave.49.cub » Tue Oct 03, 2017 6:32 am

The radiator drain plug in my 1949 tractor is frozen and I have never been able to remove. I'd like to get advice on best ways to try to remove this thing. The plug itself is in fair condition and not too buggered up. I've got a propane torch but that's it. I'd sure like to hear any suggestions on this so I can remove and replace with a new plug.
Dave.49.cub

tst
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Re: Stuck Radiator Drain Plug

Postby tst » Tue Oct 03, 2017 7:09 am

you can heat the housing but not with fluid in it, pull the lower hose off to drain it 1st

staninlowerAL
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Re: Stuck Radiator Drain Plug

Postby staninlowerAL » Tue Oct 03, 2017 9:00 am

No magic tricks but if it has not been removed in a long time be prepared for a major chore.

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Don B.
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Re: Stuck Radiator Drain Plug

Postby Don B. » Tue Oct 03, 2017 9:40 am

Mine was really mangled so I ground it flush and started drilling it out with a set of lefthand bits. Eventually, it backed out. I chased the threads and replaced it with a brass plug.
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LeeC
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Re: Stuck Radiator Drain Plug

Postby LeeC » Tue Oct 03, 2017 4:12 pm

A 12 point socket will just round off the corners, so I would avoid that. Ideally, you should use a 4 point socket if possible. I have had two that were stuck. I cannot remember if I rounded off the plug corners or they came that way, but both came loose with a bolt-out socket. --Lee
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Moondoggie
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Re: Stuck Radiator Drain Plug

Postby Moondoggie » Tue Oct 03, 2017 5:57 pm

Mine was stuck too. I put a good Vice grip on it with a cheater (long one) on the handle of the Vice grip after soaking for a week with Liquid Wrench or some such. It was tough but it came but my threads in the lower castings were messed up some. So I purchased a tap the correct size (forgot what size, getting old) and chased out the threads. Hard time finding the correct plug locally. Tried to find a brass plug so it wouldn't rust up again. I drain every winter down here in Texas because I never know when we'll have a freeze (lite turns into hard sometimes here). I don't always get out to my "farm" (3 ac.) before a freeze. Don't use tractor in winter much.

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Re: Stuck Radiator Drain Plug

Postby Smokeycub » Wed Oct 04, 2017 12:15 pm

Don B. wrote:Mine was really mangled so I ground it flush and started drilling it out with a set of lefthand bits. Eventually, it backed out. I chased the threads and replaced it with a brass plug.

I did basically the same thing. Mine was not coming out in one piece - and on top of that my bolster/lower radiator housing had been extensively brazed up so I replaced it and installed a brass plug.
Ray
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Re: Stuck Radiator Drain Plug

Postby Scrivet » Wed Oct 04, 2017 9:29 pm

Moondoggie wrote:........ Hard time finding the correct plug locally. Tried to find a brass plug so it wouldn't rust up again...........
Isn't it a 3/8" pipe thread plug? :? I wouldn't think that would be hard to find at all, even in brass. A slathering of anti seize would keep any rust away on a regular fitting, especially with you removing it every year.

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Lt.Mike
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Re: Stuck Radiator Drain Plug

Postby Lt.Mike » Wed Oct 04, 2017 9:42 pm

One trick that’s worked for me is to weld a nut to the end filling the center and making it cherry red in the process. The mr gives extra purchase and the heat breaks the bond.
Mike
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bofahs
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Re: Stuck Radiator Drain Plug

Postby bofahs » Wed Oct 04, 2017 9:50 pm

While you're at it, and if you're changing it anyway, why not a stainless steel plug? Even less likely to gall up than brass, and the square head of it will be far less likely to distort in your wrench should things become sticky.


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