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Radiator Drain Plug/Petcock Leak

Old Aug 23, 2025 | 04:47 PM
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Default Radiator Drain Plug/Petcock Leak

Hoping someone can help. I swapped my water pump this morning and when I re-installed the radiator plug and added coolant, it started leaking from the small drain below the plug.

I’ve got a picture of the issue and of the plug. I can’t seem to find a replacement plug anywhere (in store or online) or even a picture of the one I have to see if it had an o-ring that fell off.

2003 Dakota SLT 4WD, V8, 4.7L

Any help would be appreciated.



 
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Old Aug 23, 2025 | 05:40 PM
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Yes, there is supposed to be an o-ring there......
 
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Old Aug 23, 2025 | 06:30 PM
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Originally Posted by HeyYou
Yes, there is supposed to be an o-ring there......
Any ideas on how I might track one down? I can’t seem to find this exact plug anywhere online.
 
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Old Aug 23, 2025 | 08:04 PM
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Look in the radiator, see if it isn't still in there, and just not in the right place. Or, look in the bucket of old coolant.

I *think* the Oring goes on the nub on the end of the plug there.... I think..... so, might go to the parts store, see if you can find something that'll fit.
 
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Old Aug 23, 2025 | 08:09 PM
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Addendum: I think your radiator has been replaced from stock.... Your drain plug doesn't look anything like the stock unit..... Totally different......
 
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Old Aug 24, 2025 | 12:27 PM
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Originally Posted by HeyYou
Look in the radiator, see if it isn't still in there, and just not in the right place. Or, look in the bucket of old coolant.

I *think* the Oring goes on the nub on the end of the plug there.... I think..... so, might go to the parts store, see if you can find something that'll fit.
I did end up getting an assorted pack and found one that fit on the end and that sealed it right up. I couldn’t see the old o-ring inside the hole so assuming it must have been flushed out. Thanks for the suggestion!
 
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Old Aug 24, 2025 | 12:28 PM
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Originally Posted by hewey13
I did end up getting an assorted pack and found one that fit on the end and that sealed it right up. I couldn’t see the old o-ring inside the hole so assuming it must have been flushed out. Thanks for the suggestion!
Hey, it worked! Awesome.
 
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