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Engine basics => Engine set up tips => Topic started by: charlie on August 11, 2006, 04:00:40 AM
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I have a couple of ringed motors that have aluminium pistons baked black with burnt on carbon. It is well and truly stuck on. Does anyone know of some chemical that will rip off the carbon without destroying the piston? If so, will you please tell me. I don't want to use abrasive methods if I can possibly avoid it.
Thanks, Charlie
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A "dedicated" crock pot, and antifreeze. Let it cook on low for as long as needed. Prefereably "outside". y1
Bill <><
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I have a couple of ringed motors that have aluminium pistons baked black with burnt on carbon. It is well and truly stuck on. Does anyone know of some chemical that will rip off the carbon without destroying the piston? If so, will you please tell me. I don't want to use abrasive methods if I can possibly avoid it.
Thanks, Charlie
Hi Charlie
The crock pot anti freeze can and most times does oxidize the alum part very badly if you have to cook it for a long time
We have here at our auto parts stores gallon cans of Carb cleaner with a dip bucket included. Berrymans is one of the brand names. The Carb cleaners are made to dip carbs that have many different metal and plastic parts in it. I have found this to be the best way to clean heavy baked on parts such as your describing. Just dunk it in over night take it out the next day and normally all the castor goo just falls off, without turning the part dark and oxidized or pitting it
If the part is not fully cleaned just put it back in
Hope this helps
Randy
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News we can use!!
Thanks, Randy.
Jim
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Hi Charlie
The crock pot anti freeze can and most times does oxidize the alum part very badly if you have to cook it for a long time
We have here at our auto parts stores gallon cans of Carb cleaner with a dip bucket included. Berrymans is one of the brand names. The Carb cleaners are made to dip carbs that have many different metal and plastic parts in it. I have found this to be the best way to clean heavy baked on parts such as your describing. Just dunk it in over night take it out the next day and normally all the castor goo just falls off, without turning the part dark and oxidized or pitting it
If the part is not fully cleaned just put it back in
Hope this helps
Randy
I agree with Randy... this stuff works on "coked up" motorcycle heads. It contains cresylic acid which smells terrible. Wear gloves because the smell of this stuff lingers for about a week if you get it on your skin.
The only problem I've ever had was with a carb that wasn't completely submerged. It developed an etch line at the liquid line. Never had any problem with stuff that is completely covered.
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Carbon build up on diesel engines is a fact of life in F2C team race. The method most racers use to remove carbon is quite simple. You need water, baking soda, and a few balsa sticks 1/4"x1/4". Take a balsa stick dip it in the water then into the baking soda and rub the top of the piston with the end of the stick. The baking soda is a extremely mild abrasive which will not affect the piston or head button in any way plus the baking soda helps to dissolve the carbon. It may take a few applications to remove all the carbon but no more than about 10 minutes of your time to get all the carbon off. A good rubbing will remove the carbon and not affect the metal in any way. Make the balsa sticks about 3" long and after use let dry then resquare the end with a bit of sand paper and save until next time.
Scott