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Raking hay and my H manifold...

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Brent in IA

07-03-2003 10:29:15




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Going out to rake hay this afternoon (93 degrees and 70% humidity) and I am almost certain this lumpy field will shake the muffler on my '49 H loose from my manifold again. Anyone have a good (economical) solution to fix a manifold when the threads for the muffler pipe are shot? I would just buy a new manifold but am afraid I would end up breaking off a bolt in the block when I pull the old one off. If anyone has any suggestions please let me know. Thanks!

p.s. And if you want me to custom bale for you, please don't drive on your hay ground when it's wet and make ruts in your field before I get there.....

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moonlite

07-04-2003 03:33:11




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 Re: Raking hay and my H manifold... in reply to Brent in IA, 07-03-2003 10:29:15  
On my M i made a couple of braces and put under manifold nuts and welded to the pipe. Has worked for about 20 years. It is under hood and does not show. EASY



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dlp

07-03-2003 19:47:18




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 Re: Raking hay and my H manifold... in reply to Brent in IA, 07-03-2003 10:29:15  
I never tried this, but is it possible to drill from the sides & install set screws to lock the pipe down? I guess a feller could put some kind of a sealant on the treads, screw it down, & them tighten the set screws. Just a thought.



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TomH

07-03-2003 18:14:00




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 Re: Raking hay and my H manifold... in reply to Brent in IA, 07-03-2003 10:29:15  
Maybe try the bolts to see if they're really stuck (after working it to heat things up squirt some PB Blaster on them and let it soak in overnight). Manifolds always look bad but the temperature changes they cycle through seem to keep the bolts from siezing up as bad as you think. I've changed a couple with no trouble at all.



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Dan

07-03-2003 13:22:12




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 Re: Raking hay and my H manifold... in reply to Brent in IA, 07-03-2003 10:29:15  
On my SMTA i used the suggestion of the new pipe with the cut across the threads, perpendicular to them. I started it into the old threads until it got really tight, then backed it off, used oil on the threads, went back and forth gaining a little each time and using a big pipe wrench, with cheater. Got them clean enough that the new regular pipe I got(no cuts) worked. My original threads were badly worn to where the pipe wouldn't stay in at all. Problem with a tap is 1. trying to find one that big you can afford, 2. if you put too much pressure on it you can break the maniford.

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rustyfarmall

07-03-2003 12:13:27




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 Re: Raking hay and my H manifold... in reply to Brent in IA, 07-03-2003 10:29:15  
The exhaust pipe on an H or M is nothing more than 2in. black pipe, available from just about any plumber, the length I believe is about 10 or 11 inches, have the plumber thread one end of it, just like it was going to be a water, or gas pipe. As far as the manifold itself, go to a Northern tools store, or get a catalog, they have a set of three pipe threading taps, which includes a 2 inch, and rethread the manifold. Be sure to use plenty of oil, and the biggest wrench you have that will fit the tap. It is not easy, and do not try to go all the way down in one shot, you will want to go about 1/4 -1/2 turn, stop, back up to break the chip, and then go another 1/4 -1/2 turn, and so forth untill you have enough new threads in the manifold to screw the new pipe into. Be patient and it will be as good as new when you are done.

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Brent in IA

07-08-2003 06:02:03




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 Re: Re: Raking hay and my H manifold... in reply to rustyfarmall, 07-03-2003 12:13:27  
Thanks!

I thought the tap would be higher priced so I had initially ruled that out. But after your suggestions, I just ordered a 3 piece set for $39 from Northern Tool. Hope it works out, I'll post to update either way!



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FC

07-03-2003 11:16:10




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 Re: Raking hay and my H manifold... in reply to Brent in IA, 07-03-2003 10:29:15  
There have been several discussions on the rusty manifold/pipe threads on here in the past and someone mentioned getting a new pipe already threaded and cutting across the threads (I believe using a hacksaw) so it will basically chase out the threads on the manifold. Another solution would involve getting a thread chaser such as a plumber might use to clean the threads on the manifold. I believe the new pipe trick might just give enough bite to do the trick if you are careful and be sure and lubricate it while threading it in. Someone else might have another suggestion. Welding it is another option, but not very friendly should you ever want to remove it in the future. I believe you can use 2" pipe with a tapered thread (pretty common). Good luck.

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jimmyjoe

07-07-2003 15:20:22




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 Re: Re: Raking hay and my H manifold... in reply to FC, 07-03-2003 11:16:10  
I got a new pipe and welded it with nickle rod,
still holds after about 10 years.



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