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Tractor Talk Discussion Forum

Cleaning carbon build up

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Dalton S.

05-06-2008 06:29:13




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What is a good solvent to use to clean carbon and old grease out of a MH 44-6 engine. I dont want to have to take the pistons or valves out, there is just a lot of carbon built up and old oil and crud built up on top of the pistons and on the head. Could I just bring the hole engine to machine shop and have it professionally cleaned, without having to take any of the insides out? Thanks




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Lanse

05-06-2008 13:06:34




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
i would pull the head and get a fine wire brush and some carb cleaner for the top of the pistons, and use carb cleaner and a rag on the sleeves



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Dick L

05-06-2008 10:40:01




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
Not only for cleaning, when I take a head off I want to see the condition of the valve and seats. No way you can tell the condition without removing the valves. What do they call it? Maybe penney wise and dollar foolish?

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That way you can see clean.

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moonlite 37

05-06-2008 09:19:41




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
If it is running you can run some water throughthe air intake and it will clean out the top side. I have only done this with a downdraft carburetor and i just pour in enough water at high speed to keep it from dieing. Works great and is free



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Goose

05-06-2008 08:55:24




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
Get it out in the field and work the heck out of it for a few days. Before you do that, though, make sure the ignition system is in top shape.

My dad gave me a 4 cylinder 44 once that was running on only 2 or 3 cylinders. He said the engine was shot and he wasn't going to put any money in it. I coaxed it home a couple of miles away. I pulled the distributor cap and found the spring loaded carbon button was missing from inside the cap. I happened to have a VAC Case that took the same Delco Remy distributor cap, so I borrowed the cap from the Case and put it on the Massey.

I then went out on the road in the opposite direction from my dad's place. When I hit full throttle in 5th gear, you would not believe the black carbon and junk that flew out of the exhaust. I ran it several miles down the road and returned home, all full throttle in 5th. By the time I got home, it was running like a top and the inside of the exhaust pipe was starting to turn a healthy white.

I used the tractor regularly without doing anything else but springing for a new distributor cap. My dad never asked any questions, and I never volunteered anything.

Also, per El Toro's post about the Mustang, I once bought a Chevy Caprice that was only getting about 200 miles to a quart of oil, and was priced accordingly. I went ahead and built up a fresh 305 engine and figured I'd do a swap some weekend. Meanwhile, my wife started driving it to work, 25 open road miles each way. Within a month the car quit using oil altogether. Some old guy had been putting around town with it, and it was so sooted up all it took was a few thousand miles of open road to clean itself out. We put 50,000 miles on it and I doubled my money when I got rid of it.

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El Toro

05-06-2008 07:59:49




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
If oil is entering the combustion chambers your rings are probably full of carbon as Walt suggested. I had that problem on a Ford Mustang
that I had bought used and after I had it inspected it started fouling the plugs with oil.
I borrowed a borescope light from work that was used to see inside gun barrels. When I looked inside this engine I had never seen so much carbon
in an engine and some were wet with oil. I pulled the head and pistons and found the pistons full of carbon too. After a good cleaning of the ring lans on the pistons with new rings and a valve job it ran like new. I put new rod bearings in too. Hal
PS: The car only had 40k miles on it.

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JMS/.MN

05-06-2008 07:28:42




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
Solvent and an air gun works. Catch the drippings in a barrel split lengthwise, can filter and reuse.



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Mike M

05-06-2008 06:55:06




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
Do you have the head off or plan to ? If so just scrape if off. If it is all together and is able to get running there is various chemicals you can dump in or even run some rice in the engine while running.



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RustyFarmall

05-06-2008 06:53:21




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
Pour some auto trans fluid in on top of the pistons and let set for a few days, and then wipe it out. It won't be as thorough as removing the pistons, but it might be good enough



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Walt davies

05-06-2008 06:44:27




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 Re: Cleaning carbon build up in reply to Dalton S., 05-06-2008 06:29:13  
You have to strip down to the Block and head to get it cleaned.
You can't get the carbon out of the ring grooves without removing them
Have fun
Walt



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