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Tractor Talk Discussion Forum

Sticking Valves

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stan

04-02-2004 16:35:14




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I ran my tractor with some real old gas. The next day motor runs real bad no compression on 1 and 2 cylinders. I removed valve cover and found valves actually stuck down. squirted some carb cleaner on valve guide, and valves closed again. Now it runs about 5 min and valves stick again. I put a quart of rislone in the oil, and some Marvel oil in the gas. Any thing else I should Do?




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Ray,IN

04-03-2004 19:39:45




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 Re: Sticking Valves in reply to stan, 04-02-2004 16:35:14  
Back quite a few years an Uncle of mine owned a gas station. He had an adaptor that accepted a can of Gumout, actually the device was sold by Gumout, this replaced the gas line at the carb inlet. The Gumout can was placed on the adaptor that was then screwed into the carb gas inlet. You started the engine and gave it just enough throttle to keep it running. It completely cleaned the carb and removed varnish and gum as well as carbon from the entire combustion chamber. The Gumout adaptor is no longer sold, but you can put together a makeshift one quite easily from a short piece of gas line w/fitting, a short rubber hose, and a small funnel. Attach it to your tractor carb, pour in the cleaner(your favorite brand), start engine and run until the funnel is empty, turn off ignition, then reconnect the normal gas line. Allow the engine to sit overnight, and the next morning run the engine(use tractor) until throughly warmed up and runs smooth. I use this method every time one of the gas tractors begins to run rough. As the others have said, do this outdoors to avoid the fumes.

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buickanddeere

04-03-2004 12:57:45




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 Re: Sticking Valves in reply to stan, 04-02-2004 16:35:14  
Steam clean the valve stems and loosen out the carbon at the same time. Pull the aircleaner and rev her to fast idle. Spray a FINE MIST of water into the intake until she starts to labour but not beginning to miss. Keep spraying until she cleans out. Makes lots of smoke,soot and steam. Change the oil afterwards too.



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Ron

04-03-2004 06:51:56




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 Re: Sticking Valves in reply to stan, 04-02-2004 16:35:14  
Next time you get it running, have the air-cleaner disconnected and have a FULL squirtcan of motor oil ready... With it running at about 1/2 throttle, squirt as much into the intake as it will take without dieing...use the whole squirtcan of oil.. Do this OUTSIDE, as it is gonna SMOKE...!! We have great results from this...!! Yes, do be sure you have oil flow to the rockers, and if you use parts cleaner on those valve guides...oil them real good after you do..!!!

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Cosmo

04-03-2004 08:38:03




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 Re: Re: Sticking Valves in reply to Ron, 04-03-2004 06:51:56  
I had a couple of valves stick on my FE35 about three years ago. Like the others suggested I squirt a few ounces of Marvel Mystery Oil in each tank full of gas. When I change oil I substitute one quart of motor oil with MMO and have had no further valve sticking.



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Jerry/MT

04-02-2004 21:50:45




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 Re: Sticking Valves in reply to stan, 04-02-2004 16:35:14  
My only experience with this kind of sticking valve was on an old 9N that my neighbor had. It has an 'L' Head (valve in block) engine and it had a chronic problem with the valves sticking, mainly ue to non use. My neighbor mixed a pint of automatic transmission fluid with a tank of gas and he claims the problem went away. If I had the problem, I'd use some brake cleaner on the valve stems to get the varnish ands gum of them then I'd use a pint of Marvel Mystery Oil with a tank a gas and see if it worked. Rislone in the oil should also help. Sounds like you've all ready done this so run it and see how it goes. And let us know what you find out.

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old

04-02-2004 19:12:09




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 Re: Sticking Valves in reply to stan, 04-02-2004 16:35:14  
First off what is the tractor?? Sounds like you have a problem in the oil flow system as in no oil getting the the rocker arms/valve train.



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stan

04-03-2004 08:00:27




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 Re: Re: Sticking Valves in reply to old, 04-02-2004 19:12:09  
This is a AC Molel M. The oil flow to the rockers is real good. The problem happened when I needed to get rid of some 13 year old gas. I mixed 2 gal of old with with 15 gal of good gas. It ran good that day, but the next day is when I experienced the problem. the tractor has always been a good runner.



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old

04-03-2004 09:10:37




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 Re: Re: Re: Sticking Valves in reply to stan, 04-03-2004 08:00:27  
Running the old gas probably caused vanish build up on the valves, old gas is only good for cleaning parts not running in an engine



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stan

04-04-2004 08:25:45




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 Re: Re: Re: Re: Sticking Valves in reply to old, 04-03-2004 09:10:37  
Never again will I attempt to use old gas in my tractor. I have tryed several suggestions, The motor seams to be running ok now. I would like to give it a field try, but we got some rain a couple days ago. I have 15 gal of gas if someone wants it. Thanks for all the suggestions, Stan



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wdTom

04-02-2004 19:11:05




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 Re: Sticking Valves in reply to stan, 04-02-2004 16:35:14  
You might try dumping some of the Marvel Mystery Oil into the carburator intake while the engine is running. Speed up the engine and don't let it stall as you dump the oil in. It may get onto the valve stems and help. It will smoke a lot for a couple of minutes.



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