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Discussion Forum

Hole in my manifold.

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09-07-2001 09:09:54

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I bought an M a while back and I see that it has a hole in the manifold. This hole is about the size of a nickel. I cannot remember exactly where the hole is but the tractor does not run all that well and I want to get it fixed. I see that replacement manifolds are not too expensive but mine is a kerosene manifold and i would like to keep it original. I mean, it is all rusted up and I will never run it on anything but gas but I like the idea of having that different type of manifold. So, how easy would it be to get the hole patched and would a patch be a good long lasting fix? thanks for the help.


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J in Pa

09-07-2001 15:13:35

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 Re: Hole in my manifold. in reply to Jeff, 09-07-2001 09:09:54  
get your self some "hot weld" from NAPA. it works. made for exhaust manifolds.

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09-07-2001 12:42:36

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 Re: Hole in my manifold. in reply to Jeff, 09-07-2001 09:09:54  
I sell more replacement M manifolds than any other. I have a very good used one with a real good pipe for $90.00 Or a new USA made replacement that includes a new manifold pipe,gaskets and shipping for $160
Don L.
ph 507 433 0073

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Bill Smith agrees with Binder

09-07-2001 12:12:47

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 Re: Hole in my manifold. in reply to Jeff, 09-07-2001 09:09:54  
I had a manifold for an H patched up by an experienced welder by brazing. I haven't had any trouble with it yet and that has been several years ago. I always park it under a roof since I repainted it at the same time. Keeping a tractor under a roof will cut way back on rust type diterioration. Except perhaps for fluid filled rear tires. That fluid is really bad when it gets in direct contact with metal.

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John in Maryland

09-07-2001 12:04:59

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 Re: Hole in my manifold. in reply to Jeff, 09-07-2001 09:09:54  
I had a hole about that size on a Case 730. I tried that JB Weld-it lasted about all of 15 minutes. You can try it, but I think you are wasting your time with it. I can probably be fixed but you probably have other weak spots too.

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Bama Binder

09-07-2001 10:05:36

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 Re: Hole in my manifold. in reply to Jeff, 09-07-2001 09:09:54  
I disagree with Marvin on this one. JB Weld is marvelous stuff, but I don't think it is a reasonable patch material. I think the heat limit is 600 degrees or so. I can't remember the exhaust gas temp, but I think it is at or above that level.

I would start by trying to find a good one out of a salvage yard (may be just this side of impossible).

A nickle sized hole may be reparable if the metal has good thickness to weld or braze to. My suggestion is to take the manifold off, have it sandblasted and/or hot tanked to remove rust and corrosion and then take it to a good welder and see if they can weld a patch over it (actually you probably need to have them look at it first to determine if it can be patched).

Keep in mind that while this is your only hole now, there may be other areas where the metal is weak and thin, so you may have to do this again later.

Keep in mind also that the design of the manifold is to heat the air/fuel mixture to a point higher than optimum for gas so the kerosene would vaporize better, so even though the manifold is a neat thing to have, it isn't the best for pure gas.

Just my thoughts...BB

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09-07-2001 09:33:29

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 Re: Hole in my manifold. in reply to Jeff, 09-07-2001 09:09:54  
I would just cleanup around the hole and then fill it with JB Weld. I do not know how much heat JB Weld can tolerate, but it is probably your best solution for a repair without buying another manifold. You will eventually have to replace it since where there is one hole, another will shortly follow. Good luck and let us know what you do.

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