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Farmall & IHC Tractors Discussion Forum
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Carbon on top of pistons of an H

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John

03-16-2004 18:05:40




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Looking in the spark plug holes of my H, I noticed some carbon buildup on the top of my H's pistons, is that bad? It runs great. Also when I go to start it this spring I will be putting some Marvel Mystery oil in each cylinder (I put some in in the fall and turned it over then put the plugs back in). Will the Marvel Mystery oil be a problem? Thanks!!




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lee

03-17-2004 06:56:42




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 Re: Carbon on top of pistons of an H in reply to John, 03-16-2004 18:05:40  
What's the harm in the carbon deposits? I think they'll always be there. Unless it's excessive build-up causing problems of some sort.



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Buzzman72

03-17-2004 05:13:16




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 Re: Carbon on top of pistons of an H in reply to John, 03-16-2004 18:05:40  
You can go to your GM dealer and get a can of "Top Engine Cleaner," or go to your auto parts store and get a can of "Casite," which is manufactured/marketed by the Hastings piston rings folks. Either will do an excellent job of removing excess carbon buildup...and if you've got valves sticking due to carbon buildup on the stems, I can personally recommend "Casite" to take care of the problem. Read and follow label directions, as they say.

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fred

03-16-2004 19:47:20




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 Re: Carbon on top of pistons of an H in reply to John, 03-16-2004 18:05:40  
Something I heard here lately that I didnt know is that if you are running a 6 volt system be sure & use copper plug wires & not the newer carbon wires. What I heard was that the 6 volt spark didnt travel through the carbon wires as well & you get incomplete combustion & carbon buildup in the head.



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Michael Soldan

03-16-2004 18:44:22




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 Re: Carbon on top of pistons of an H in reply to John, 03-16-2004 18:05:40  
John, it is more normal that there would be some carbon on top of a piston as not. We use "Cleens" ,a fuel system cleaner available at Carquest that we run through the carb as the engine fast idles, it does a good job of cleaning up carbon..I'm sure there are many other products of that nature but I can vouch for this one ..it does remove the carbon.....Mike in Exeter Ontario



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CNKS

03-16-2004 18:20:14




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 Re: Carbon on top of pistons of an H in reply to John, 03-16-2004 18:05:40  
I don't know that it's a problem, just not necessary. If you are concerned about lack of lubrication after it sits a while, just squirt whatever motor oil you use in the plug holes.



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r4etired

03-16-2004 18:32:37




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 Re: Re: Carbon on top of pistons of an H in reply to CNKS, 03-16-2004 18:20:14  
Warm the engine up remove the air inlet to the carb. Fill a squirt bottle like a windex bottle, one that sprays, with cold water. Run the tractor at a good fast idle. spray the water in, not enough to kill it. do this for 3 or 4 minutes and it will loosen the carbon



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Andy Martin

03-16-2004 19:26:51




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 Re: Re: Re: Carbon on top of pistons of an H in reply to r4etired, 03-16-2004 18:32:37  
Water works great, but it can loosen a large chunk of carbon which, legend has it, can get stuck in an exhaest valve seat on the way out.



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