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Broken exhaust manifold

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Alabama Andy

08-23-2001 19:36:10




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Hey guys,

Spent about 45 minutes brush hogging today (what a way to unwind after work!) I'm cutting through some very dense stuff, including honeysuckle and other tough bushes / small trees which choked a large part of our land during the years it sat vacant. I kept the '51 8N in first gear to avoid running up too fast on anything I couldn't see, also to help get through the really tough bushes.

At one point, going through a particularly dense area, the tractor engine suddenly got MUCH louder, and I started to smell exhaust and feel heat on my right leg. Something caused a break clean through the pipe (which was pretty rusty to begin with), right up near the aftmost cylinder. I kept going for a while, cutting my way back toward the house.

Is it dangerous to run it in this condition (will the escaping heat cause any trouble for the engine, wires, fuel system, etc)? Is it difficult to replace the exhaust system (which probably needed it anyway, nothing about it looks remotely new)?

I'm very much looking forward to winter, when the plants slow down and I can spend more time tinkering with (and repainting) the tractor!

Andy

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RICKWI

08-23-2001 20:20:24




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 Re: Broken exhaust manifold in reply to Alabama Andy, 08-23-2001 19:36:10  
The whole thing (manifold, gasket, clamp, and pipe/muffler) should cost less than $100 and take less than an hour to put on. Save the carb gasket and reuse w/ a little sillycone.
Of course if the brass nuts have been replaced with steel and rusted on and you twist of a stud, or drop the carb, or twist off the gas line, the time could extend out to two or three days. Especially if Murphy helps.

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trial and error

08-23-2001 19:46:51




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 Re: Broken exhaust manifold in reply to Alabama Andy, 08-23-2001 19:36:10  
it's a breeze to replace the muffler system..1/2 hr,45 minutes. if that's all it is..I ran straight off the manifold one work day till my ears got tired..also past owners let a leak go too long until the block got burnt near the leak. I used JD weld to smooth out the block and then used the high temp silicon from permatex to seal the new gasket. no problems



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oh, and if the manifold IS broken

08-23-2001 19:49:28




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 Re: Re: Broken exhaust manifold in reply to trial and error, 08-23-2001 19:46:51  
find a real good welder that can weld cast iron, I can't, i tried, and it looked like it, threw it away and replaced it..but that was long ago on another N I had



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welding exhaust . . . Dell (WA)

08-23-2001 20:59:37




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 Re: Re: Re: Broken exhaust manifold in reply to oh, and if the manifold IS broken, 08-23-2001 19:49:28  
welding exhaust contaminated castiron is a loosing proposition. Let alone the problem of welding clean castiron. Since exhaust manifolds are readily available and are relative inexpensive, donna mucka round trying to weld old castiron exhaust manifolds. Now if'n it were the only one left on earth, yeah go ahead and try to weld it, but you won't succeed..... ...Dell



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bj/8N/mt

08-24-2001 05:46:22




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 Re: Re: Re: Re: Broken exhaust manifold in reply to welding exhaust . . . Dell (WA), 08-23-2001 20:59:37  
Hit a concealed t post four years ago and broke the pipe flange off an 8N manifold. Brazed it back. Still works fine but has yet to last a "long" time.

Your mileage may vary



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bg

08-23-2001 22:58:08




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 Re: Re: Re: Re: Broken exhaust manifold in reply to welding exhaust . . . Dell (WA), 08-23-2001 20:59:37  
A new manifold is less than $60.00. Before I'd go through the hassle of trying weld an old rusty one, I'd sure break out the greens.



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alan/norway illinois

08-23-2001 19:40:26




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 Re: Broken exhaust manifold in reply to Alabama Andy, 08-23-2001 19:36:10  
might cause valve problems valves cool down to fast with the rush of air when you shut the engine off



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Alabama Andy

08-23-2001 20:05:01




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 Re: Re: Broken exhaust manifold in reply to alan/norway illinois, 08-23-2001 19:40:26  
That hadn't even occurred to me. Thanks.



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