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Farmall & IHC Tractors Discussion Forum
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Exhaust pipe removal. How difficult?

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Mike CA

02-22-2007 09:04:36




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The exhaust pipe coming out of my manifold on my '46 H is shot. It's rusted and cracked open and needs to be replaced.
How hard is it, honestly, to replace one of these? I know it threads in. But after 60 years, will the threads be shot? What tool(s) will I need? What will help get it out?

I'm assuming the new pipe will thread right in after the old one is out. But any tips for that?




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GordoSD

02-23-2007 06:46:35




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
Use the sawsall. Cut it off horizontally 1/2 inch or so above manifold. Then make a vertical cut just barely into the manifold threads. Pound it out. I've done three or four and it takes 10 minutes tops.

Gordo



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Mike CA

02-22-2007 23:23:44




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
Thanks for the tips. I'm without a welding torch. I'll look into buying maybe a propane one. Sounds like I'll probably need one to pull the old boy apart anyway. I think probably the best option for me is to see if I can take it to muffler shop. I'll call one where the tractor is and see how much they would do it for. I have no idea where to tap out threads, or where to get that stuff, so hopefully they can do that as well.

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El Toro

02-23-2007 04:16:47




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 23:23:44  
Buy the Mapp gas instead of the propane as it contains LP and acetylene gas and will get hotter.
Home Depot has them. Hal



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Chrisco

02-22-2007 12:37:51




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
Here is a trick i learned if you want cut the pipe off 1 inch above the flange and take a rag shove it the hole. Then take a sawzall and cut the pipe so you can cut the threads out and then take a chisel and a hammer and pound it in. It has worked good for me.



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gene bender

02-22-2007 10:47:51




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
I have removed a bunch as i resstore,repair and so forth. Like they tell you use a torch. You will have to chase the threads when you get the old one out. You can go to any home improvement place and get a new pipe use plenty of NEVER SIEZE on the threads that way you can remove it easy.



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Dan Bear Kelley

02-26-2007 14:42:33




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 Anti-Seize Lubricant in reply to gene bender, 02-22-2007 10:47:51  
That anti-seize lubricant is the best stuff since sliced bread! Basically, it's aluminum, zinc, copper and a few other powdered metals in a petroleum base. After the petroleum evaporates, the powdered metals prevent the metals from sticking together. GREAT stuff!!!



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gene bender

02-27-2007 04:56:23




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 Re: Anti-Seize Lubricant in reply to Dan Bear Kelley, 02-26-2007 14:42:33  
Yes i alsays use it as i use the exhaust lift on my implements and sometimes sell just the tractor so i never know when i will want to remove the pneumatic lift stuff.



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sflem849

02-22-2007 10:46:16




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
I have good luck with getting it red hot and then hitting it with good penetrating oil (ie PB Blaster, Fluid Film, MM Oil, JB 80) Something about the rapid heat change and the differences in cooling will draw the oil in. Just a tip.
I have a feeling your threads will be so rotted that you will have problems running good new threads. I had to thread/weld mine in. I wasnt real worried bc the manifold had a hairline crack in it and I had to have that zapped too.

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El Toro

02-22-2007 10:24:50




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
I would use an acetylene/oxygen torch to heat the heat the area. If you don't have this take it your local muffler shop. They run into this problem quite often and they do use the torch. You can't beat the heat. If the threads need to be chased you can rent the correct size pipe tap.
They may even have them on your Navy Base at your Post Engineer's branch or division that does the
the base plumbing. Since I'm retired from the US Government I know all the military bases have this. They would probably do the thread chasing for you. Hal
PS: Home projects usually got first priority.

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teddy52food

02-22-2007 10:11:41




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
If you try to remove it with the manifold on the head, make sure you pack a rag below it to keep chips, rust etc. from getting in the engine. If it is thin, get a piece of shaft that fits close inside to prevent collapsing when you use a pipe wrench. I would heat it ( red hot) & let it cool a couple times to break it loose.



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dhermesc

02-22-2007 09:45:40




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
One option would be to remove the manifold and take it to a plumber. They have all kinds of experience in removing rusted pipe. They will also have the correct tape and die to clean the threads and thread a new pipe.



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Nat 2

02-22-2007 09:14:53




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
It'll probably break off even with the top of the manifold if you try to wrench it out.

Use a cold chisel and hammer to carefully collapse the pipe inwards away from the manifold threads. Pull the crumpled piece of junk out and discard.

The threads should be thoroughly cleaned before installing the new pipe. A 2" NPT tap would be best, but a wire brush and jack knife will work too.



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JayWalt

02-22-2007 09:08:58




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 Re: Exhaust pipe removal. How difficult? in reply to Mike CA, 02-22-2007 09:04:36  
alot of penetrating oil, the good stuff, and heat. You may find it will crumble when u put a pipe wrench on it, in that case... I dunno...

Take your time, take it easy and GL



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