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Tractor Talk Discussion Forum

Removal of Iron pipe from cast iron manifold

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Irv Plitzuweit

06-28-2006 12:48:19




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Will be attempting to screw out 1 3/4 inch iron pipe from cast iron manifold on Continental 6 cylinder flat head engine. It has been soaking several days with "Kroil" on threads. My question is how do I heat with acetylene torch? Do I just heat the pipe? try turing it out while hot? pour cold water on pipe while hot? heat both pipe and manifold. I don't want to crack manifold, so need some advice. THANKS

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Randy as in Randy-IA

06-28-2006 18:28:02




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 Re: Removal of Iron pipe from cast iron manifold in reply to Irv Plitzuweit, 06-28-2006 12:48:19  
I just did that a few weeks ago on my M manifold . Try tightening it first with a big pipe wrench . If it moves at all stop and start to back it out some and rock it in and out till it's free . If you are lucky it'll move this way , mine didn't . The pipe crushed so I ended up doing it the way Old just described and it worked good only I used a punch . Take your time . I used my 16oz hammer and only put as much behind it as needed to bend the iron . Just keep bending one side in and it'll come free . Good luck ...Randy

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old

06-28-2006 13:04:16




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 Re: Removal of Iron pipe from cast iron manifold in reply to Irv Plitzuweit, 06-28-2006 12:48:19  
The last time I did that all I did was take a chiese and satrted working a cut down the inside and pushed it in so I didn't get in to the treads. But the pipe was very far gone so it came out pretty easy. And the manifold is still good



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doogdoog

06-28-2006 12:59:41




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 Re: Removal of Iron pipe from cast iron manifold in reply to Irv Plitzuweit, 06-28-2006 12:48:19  
Aloha, Don't forget to add more Kroil oil after it cools.

Mahalo,
doogdoog



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RustyFarmall

06-28-2006 12:57:33




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 Re: Removal of Iron pipe from cast iron manifold in reply to Irv Plitzuweit, 06-28-2006 12:48:19  
Cut the pipe off just above the manifold, cut the pipe straight down the inside in one or two places, and then use a hammer and punch to peel the pipe out of the manifold. If you are careful you will not damage the threads. Penetrating oil of any brand just won't get the job done, and unless you have a way to heat the entire manifold to a cherry red that method won't work either.



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Vern-MI

06-28-2006 12:55:11




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 Re: Removal of Iron pipe from cast iron manifold in reply to Irv Plitzuweit, 06-28-2006 12:48:19  
Heat the threaded joint all around until it is dull red. Play the torch so that you don't cut through or melt the cast iron. Then remove the torch and let the manifold set and cool naturally for several hours. DON'T put anything on the hot manifold to accelerate the cooling such as water as it may make it crack. The next day try to loosen the threaded joint. It will very likely be loose and able to be unthreaded.

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Irv Plitzuweit

07-01-2006 07:09:12




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 Re: Removal of Iron pipe from cast iron manifold in reply to Vern-MI, 06-28-2006 12:55:11  
Vern-MI advice worked just fine, heated manifold and pipe came right out. THANKS



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