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D 19 Diesel freeze plug leaking question

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Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=50404
Printed Date: 21 Aug 2025 at 4:44am
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Topic: D 19 Diesel freeze plug leaking question
Posted By: DarrylinWA
Subject: D 19 Diesel freeze plug leaking question
Date Posted: 11 May 2012 at 8:21am
My D 19 Turbo Diesel is starting to leak out of the freeze plug behind the water pump.I am using this tractor about 6 hrs on Sat for parade rides and show for a local charity. I was going to add black pepper in the rad and unlock the filler cap on the rad. so there is not much pressure. Any other suggestions? I should be fine running that this way or any other ideas.
 
Thanks and one more thing to do for the summer on the list
 
DarrylCrySmile


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B 10 Custom. Serial # 1001 D21, First D21 built 69 #4498 and Last D 21 Built #4609. 1946 MM UTU. And 2000, 2005 Pete's. AC custom Hauling.



Replies:
Posted By: CTD03
Date Posted: 11 May 2012 at 10:52am
Bump for ya


Posted By: dscott
Date Posted: 11 May 2012 at 5:10pm
Personally I would check it out. Remember a few hours labor and a couple dollars in parts are alot cheaper then overhaulin an engine. Just so ya know i have seen freeze plugs rust out from the inside out.
 
 
             just my 2 cents
 
            Darrell


Posted By: D-17_Dave
Date Posted: 11 May 2012 at 7:40pm
Loosening the cap will reduce the pressure but will allow the water to push out there instead of the hole. No big gain as it will eventually run the water level down. If a patch is needed to get by I'd select a good brand of sealant that will react properly with the applied heat and seal off the hole until your repair time allows for it to be done properly. I'd stay away from home remedies like pepper. As said above, to rebuild this engine would be costly over a 2.00 plug.......

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Yea, I can fix that.....


Posted By: Orange Blood
Date Posted: 11 May 2012 at 8:10pm
If it is just a small leak, i.e. not a stream, then I would loosen the cap drain a little off, and run her.  Parade work, wont even be known by that engine.  Keep the RPMs down, and the load down.  
Hopefully the temp gauge works good, and you can keep an eye on her, but as long as you aren't running her down the road for miles, or pulling 12,000 4-Hs up Mount Everest, you will be fine.

Check the coolant level often, and keep it right at the top of the cooling tubes, i.e the bottom of the top tank, that way if you do get her a bit warm, she won't puke all over everything, since the cap is loose.

Enjoy the day and don't worry about it.


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Still in use:
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