Slow Leak From Radiotor Drain Plug!

[jzak]

Hey Guys,

So the drain plug on my CJ5 radiator is leaking very slowly. I tightened it down a bit, but it didn't make any difference. I'm worried about tightening it down too hard because its made of plastic, and could break. Any solutions on how I could stop the leak? Maybe take the plug out and replace it with a steel bolt?

Thanks!

Josh

 

[GRR]

Get a brass drain cock from any auto parts store.


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[jzak]

Get a brass drain cock from any auto parts store.


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Do you know what diameter and thread size would fit?

 

[GRR]

Do you know what diameter and thread size would fit?

I'm not positive. I think it is just a standard 1/4". I just put in a new radiator and just grabbed one at the autoparts. I'll look tonight to see if I still have the package.

 

[jzak]

Would really suck if I got the wrong threat size, and it starts leaking again. Does anybody else know what the correct thread size is for the factory radiator drain plug?

 

[RiverandSand]

Most radiator drain cocks are 1/4 pipe which has a 18 thread pitch. Mine is, but it's not a stock jeep radiator.

 

[jzak]

Just ordered this. Its 1/4 inch diameter, but not sure about the thread size. Only costs $2, so it's worth a try.

 

[GRR]

Just ordered this. Its 1/4 inch diameter, but not sure about the thread size. Only costs $2, so it's worth a try.

That should be fine. Mine is in a new radiator, but it is a 1/4” NPT. Dorman part number 61106




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