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Farmall & IHC Tractors Discussion Forum
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broke the coolant drain on 400

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Steven D. Esser

02-05-2006 20:25:58




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When I had the upper bolster off my 400, I manage to break the drain pipe in the bottom of the radiator. An Easy-out fit into it very well, but I couldn't grunt enough to get it to turn out. I used a 1/2 X13 tap and put a bolt in it. That didn't work at all. Any suggestions I receive will be appreciated. I haven't put anything together that I can not remove again. I only have I butane torch for heat. Would that be enough? Otherwise I might tap it to 5/8 X 11.

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Wayne Swenson

02-06-2006 17:21:54




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 Re: broke the coolant drain on 400 in reply to Steven D. Esser, 02-05-2006 20:25:58  
Take a Dremel type high-speed grinder with a 1/8" carbide straight bit and carve a slot on the inside of the broken pipe. Go as deep as you can without touching the radiator threads; repeat 1/3 of the way around and the broken pipe will fall out with a slight tap inward from a chisel & hammer.
Wear eye & face protection, gloves and long sleeves or you will have MANY small metal shards causing itch and irritation for a long time. (don"t ask!)
I have also used this proceedure to remove broken off sparkplugs that left the threads in the cylinder head. (Head removal is not necessary.) After removing the broken thread, use a magnet & compressed air to clean the remnants. Dig out all the old copper gaskets, re-thread the hole, and then put in a new sparkplug with Anti-sieze on the threads.

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Tom F

02-06-2006 13:13:38




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 Re: broke the coolant drain on 400 in reply to Steven D. Esser, 02-05-2006 20:25:58  
IM not sure what type of "easy-out" you have but there is a little trick to removing anything with a thin wall. I use the square type extractor on thin walled objects. The square type extractors have sharp flutes on each corner and with a few light taps of a hammer and a twist will, more often than not, get that bugger out. Spiral tyle extractors work great on broken bolts but their spiral design pulls the extractor deeper therefore applying outward pressure on thin walled objects and they cause the object to lock up even tighter. The square type applies minimal outward pressure making removal easier.

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El Toro

02-06-2006 08:08:04




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 Re: broke the coolant drain on 400 in reply to Steven D. Esser, 02-05-2006 20:25:58  
I think I would do as Jim has suggested using a sharp metal saw blade. I would suggest heat, but not on a radiator. You can hold a hack saw blade with a pair of vise grips. I wouldn't run a tap
into the threads unless it was for pipe threads.
The threads may be ok and just use some pipe dope on the new fitting like Gasoila. Hal
PS: Once you have sawed the old broken fitting
try your easy out to see if is loose. Needs to be turned CCW to remove.

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Janicholson

02-06-2006 06:22:51




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 Re: broke the coolant drain on 400 in reply to Steven D. Esser, 02-05-2006 20:25:58  
Easiest would be to tap it for Tapered pipe threads.
3/8 npt would be the size (I think) to deal with the existing hole in the original plug. The biggest if is whether the drilled hole is in the middle of the plug, (or like sometimes happens) it is eccentric.

I think heating will be potentially destructive if heat travels to any soldered seam.

Using a hacksaw to cut into the plug from inside toward threads in two places leaving about 1/8" material between saw cuts (and stopping short of threads ((Careful)), can allow a 1/8" pin punch, which has been ground at a slight angle, to be used to peel the 1/8" piece out of the plug, freeing the remainder to turn.
Best of luck,
JimN

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Steven D. Esser

02-06-2006 08:05:48




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 Re: broke the coolant drain on 400 in reply to Janicholson, 02-06-2006 06:22:51  
Thank you for the info. I feel as if you jumpstarted my brain also. My little voice in my head told me not to use heat and I wanted to find a different option. We have some 1/4 npt at work and I think I will try to tap the stuck piece first and try to cut it out if that does work.Thanks again



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Brownie 45

02-06-2006 01:48:20




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 Re: broke the coolant drain on 400 in reply to Steven D. Esser, 02-05-2006 20:25:58  
I forget which company makes them, but a cam-action tool is available for just such a situation as you are in. I used one to remove a broken off pipe. Don't imagine a little heat would hurt, about what your butane torch is capable of. I never like to get carried away with heat on a radiator. I'm thinking the tool is made by Superior Tool Co. but can't be sure[it's out in the shop]. I think Ridgid would probably have them also. They are available in standard pipe sizes.

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