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Tractor Talk Discussion Forum

Re: Whats the deal with exhuast covers?

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Peat

05-04-2004 10:17:16




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When I go to shows and see all the shiny green, red, orange etc. I see exhaust covers on the mufflers. I keep one tractor outside and will put a bucket over the exhaust in the winter time so I don't freeze and crack the exhaust manifold. But in the middle of the summer is it really necessary to keep the exhaust covered? I'm sure most of these show tractors live in a heated garage. I can't help but think of years ago when everything spent its entire life outdoors. The equipment was weathered but it kept on running.
Any one have any thoughts on this? Maybe I am missing something.

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Gary

05-05-2004 20:29:27




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
Exhaust covers on diesel engines are used to stop the engine from running backwards when it's being lugged down so far as to stop the engine. It was possible for the engine to kick and start again running backwards. Oliver used to require them on all of their diesel engines. It's in their shop manuals. Other manufacturers may have had the same requirement. Stopping water from entering the enigne was a secondary benefit.

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Garry

05-05-2004 11:11:25




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
I've always wandered the oposite. Why will people not put them on. They only cost a few dollars and can prevent lots of damage and you don't have to remember to cover the exhaust.



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tlak

05-05-2004 10:08:57




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
Most the covers Ive seen are $3-7 and you dont forget to stick them on. No brainer



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Lyle (Sask)

05-05-2004 09:25:01




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
This thread prompted a few memories ...

We ran a John Deere 60 gas, and R diesel for a while while I was a kid on the farm.

ON more than one occasion, I'd forget to grab the can covering the exhaust, when the old 2 cyl fired, the can would be fired right up in the air 5 to 10 ft or so, and I'd be ducking for cover...

Like all have said water/ice etc are just not meant to be on the inside of the engine ...

Lyle.

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buickanddeere

05-05-2004 05:23:19




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
If the water hasn't had enough time to drain into the crankcase before starting. The hydraulic locking load pounds bearings and stresses rings/piston ring lands.



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Pitch

05-05-2004 02:53:37




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
Several years ago I was in the market for a good size garden tractor. There was a used equipment dealer that had a goodloooking JimDandy that had been retrofitted with a nonstock engine and had verical exhausts coming up on either side of the hood. This was in January or Feb. He cranked it over so I could hear it run and it made the most GODAWFUL noise. The heads were filled with ice and he twisted the valve assembly all to heck when he cranked it. Then he couldn't understand why I was no longer interested. Too bad it was a heck of a nice little tractor.

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Hugh MacKay

05-05-2004 02:16:24




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
Peat: My experience with exhaust covers or caps, and this was a commercial farming operation. They work well on diesels. I've found they only last about a year or so on gas engines. I think the gas engine runs enough hotter the caps deteriorate very quickly. I could get 10 or better on a diesel. I now carry a small soup can for my little gassers, however I rarely leave them outside.

Pre 1965 or there abouts, tractors should be stored inside anyhow. Most of the early tractors were not very water proof. As you get into the late 60s and 70s water didn't get into gear boxes, etc. nearly as bad.

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Sid

05-04-2004 21:03:24




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
With an upright exhaust heat rises out the exhaust after the engine has been shut off By covering the exhaust with a flapper cap you are slowing the heat loss. We know rapid temperature change can damage metal. Now I am not going to argue that if you leave your exhaust open it will cool down too fast and damage every time but I do know it could be possible. Beside the rain getting in after spending several dollars on rebuilding and restoring a tractor A five dollar rain cap ain't much to spend to give it even a little bit of protection. Besides they look purty.

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gene

05-04-2004 20:23:27




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
there are several reasons to cover the exhaust on a tractor. first an formost it is prevent rain water from getting into the cylinders of the tractors an causing havick inside the motor. an then second it is easy to see that he has never had a tractor that got water in the exhaust then was started. guess where all that water an carbon goes. thats right back out the stack on 9 times out of ten right on you an your clean show cloths or some that happens to be standing any where close. it sure make a people happy to get covered with sooty water first thing in the morning, or in fact any time of day. then it also gets all over the tractor so you end up haveing to wash the tractor again. that is just my 2 cents worth, take it for what its worth
johndeeregene

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Mguy

05-04-2004 20:05:14




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
You must be from Arizona.



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JD-Tractor

05-04-2004 19:10:35




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
Even more paranoid about exhaust covers, when I was younger 35 years ago I worked for a farmer in New Jersey and we always kept the tractors in a shed with a cover on the exhaust,I questioned why and told "just in case " It was in January and freezing weather at night I parked the farmall H in the shed and forgot to put the cover over the exhaust,it rained and froze !You guessed it directly above the exhaust pipe there was a nailhole in the roof.Needless to say we didn't use that farmall the next day. (true story)

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Hugh MacKay

05-05-2004 02:41:41




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 Re: Re: Re: Whats the deal with exhuast covers? in reply to JD-Tractor, 05-04-2004 19:10:35  
JD Tractor: You make a good point that maybe even you don't realize. Your tractor is far more vulnerable from a leak above it than it is just sitting outside in the rain. Not much water will ever get in just overnght in a rain with a tight exhaust. Problem really happens when a stream of water gets directed into exhaust. Had a Farmall 300 once with pipe loose into manifold. Water running along hood and following pipe down the outside filled the cylinder with exhaust valve open just over night. That will never happen with a tight exhaust and sitting outside over night. Sitting out for weeks, months or years will be different.

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jdemaris

05-04-2004 19:03:07




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
Don't see why you have a problem with it. Most of my tractors sit outside, and the ones with vertical exhaust have rain-caps and buckets over-them, so maybe I'm double rediculous. I've had too many damn tractors get setup from sitting with rain coming in the exhaust. Same problem with transmission shifters. If they don't have boots, or some sort of cover, the transmission fill up with water. One case in point - I brought home three good running Case DCs two years ago. One I was kind off thinking of parting out, and I got lazy, and did not cover the exhaust. Well, it's locked up tight now. That's stupid and I'm kicking myself. If a tractor is being used on a regular basis, the cover probably does not matter. But, I've got over 40 tractors. Some get used daily, and some are lucky to get started once a year.

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Dan in Wisconsin

05-04-2004 10:36:23




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 Re: Re: Whats the deal with exhuast covers? in reply to Peat, 05-04-2004 10:17:16  
I suspect if these tractors spent all there life indoors that an exhaust cover would not be needed. Since many tractors don't enjoy that luxury and sit out in the elements an exhaust cover is the inteligent way to go. If it rains and the water goes down the pipe it is going to want to keep going down. It will then find it's way into the engine and dilute the oil and raise all kinds of cane. That's my thoughts. Regards, Dan

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jim

05-04-2004 16:54:16




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 Re: Re: Re: Whats the deal with exhuast covers? in reply to Dan in Wisconsin, 05-04-2004 10:36:23  
Then the water gets in the engine and starts rusting things up, does not do anything any good. Bad-Bad-Bad things happen



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Dave_Id

05-04-2004 10:42:37




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 Re: Re: Re: Whats the deal with exhuast covers? in reply to Dan in Wisconsin, 05-04-2004 10:36:23  
I have to agree, when you live in the midwest or back east, you can easily get dumped on a couple inches or more of rain at a time, and your tractor is sitting at a show getting full of water.



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