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water getting into my exhaust

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Charlie M

05-04-2008 14:16:46

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A few years ago I put a new manifold on my M along with a new exhaust pipe. I can't seem to keep the pipe tight and when it rains it gets into the manifold. A lot of water comes out when I start the tractor. Seems I can always turn the pipe a little more. Threads are good and there is a cap on the muffler so the only place I'm thinking water can get in is around the pipe threads. Any good ideas for sealing the threads so it stays tight and water doesn't get in.

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Hugh Mackay

05-05-2008 16:29:29

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Re: water getting into my exhaust in reply to Charlie M, 05-04-2008 14:16:46

Charlie; First off, ship that rain cap off to the scrap yard. I've seen those things stand up in a storm and funnel water down the pipe by the gallon.

If the exhaust pipe if real loose water will run along the hood and follow the pipe down. In fact I've seen that put more water down a stack than any other cause. Probably 30% of what hood catches will run to the pipe.

Another bad habit a lot of folks have is parking tractors near higher buildings or near big trees. Those will deflect a lot of water down on a tractor. Leave it 200' from any higher objects, you'll have a lot less trouble. I once left Farmalls 560D and 300 in the middle of a 100 acre field, nothing over the stacks. Over night we had a 9" rain fall. When we started them they hardly blew black soot. You may ask why, or how? A tractor parked alone on a open field will actually create it's own updraft, and very little water will go down a tight stack. I never worry about covering a stack over night. More than 2-3 days and they are always covered by a tight fittin soup can. I have one in every tool box.

Deflections, my friend are what puts water down a stack. You go down a new tractor line up at a dealer in 2008, gone is the rain cap

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Bob Kerr

05-05-2008 07:10:41

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Re: water getting into my exhaust in reply to Charlie M, 05-04-2008 14:16:46

Not sure if replacement manifolds have it or not but check to see if there is a small hole at the lower part of the cast heat shield that wraps around the intake part. The originals have it and it is so water can escape. They tend to get plugged with rust and crud. If the new manifold doesn"t have it check down inside to make sure if you drill a hole you won"t dril into the intake part. Look at your old intake and you will see the 1/8th " hole I am talking about. Also the post about getting it good and hot and really tightening it down is good. A lot of them ran with loose pipes and wore the threads out so they won"t tighten. My M is like that and the pipe flops around since the threads are about gone. A lot of guys welded them up, but I personally don"t like that idea much. New threads and a new pipe is what I am going to do to mine.

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Jerry Gilliam

05-05-2008 04:58:35

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Re: water getting into my exhaust in reply to Charlie M, 05-04-2008 14:16:46

Hope you did not do what I did on my 460. I bought an exhaust manifold that fit a 460 or 560 and put her on. Sounded good and worked good by cutting the hole in the sheet metal a little larger. The big thing I forgot was to plug two holes in the manifold with 2 3/8 inch bolts that I did not use. I only screwed in the exhaust pipe. Every time it rained it got water in the exhaust big time. I kept working with the pipe and rain flapper. I did not see the two holes(one on each side of the exhaust main hole. But they were there. LOL

Jerry Gilliam

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Red Mist

05-04-2008 16:16:40

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Re: water getting into my exhaust in reply to Charlie M, 05-04-2008 14:16:46

Charlie M said: (quoted from post at 14:16:46 05/04/08) Threads are good and there is a cap on the muffler so the only place I'm thinking water can get in is around the pipe threads. Any good ideas for sealing the threads so it stays tight and water doesn't get in.

Charlie: Don't count on a weather cap to keep water out. Won't happen. Any time you get a breeze during a shower - if the breeze is in the wrong direction - it will lift the weather cap and funnel water right down the ol' pipe. Better to ignore the weather cap and hang an old tire over the top of the muffler when not using the tractor. That'l work good. mike

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1fortyfanatic

05-04-2008 15:48:54

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Re: water getting into my exhaust in reply to CNKS, 05-04-2008 14:16:46

You must have installed the pipe on my 140 lol! I can't get that thing off for the life of me, and the muffler is welded to the pipe. Get's old having to take the manifold off anytime I want to remove the hood! :D
Dave

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Randy-IA

05-04-2008 15:31:47

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Re: water getting into my exhaust in reply to Charlie M, 05-04-2008 14:16:46

Try exhaust repair putty called muffler putty I think . It used to be sold at Oreilly's . Smear some on the threads and tighten it down . It hardens when it gets hot . I don't know if it makes a water tight seal or not . ...Randy

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the tractor vet

05-04-2008 15:03:53

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Re: water getting into my exhaust in reply to Charlie M, 05-04-2008 14:16:46

The key to getting it tight is ya got to work the snot out of it and get her good and HOT THEN take atleast a 18 inch pipe wrench to it with a cheater of at least two foot and tighten it.

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Nebraska Kirk

05-04-2008 14:48:44

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Re: water getting into my exhaust in reply to Charlie M, 05-04-2008 14:16:46

You might try using some type of high heat sealer like furnace cement.

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