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Old 03-12-2007, 12:18 AM
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Originally Posted by joe_padavano
Oven cleaner is the best, least expensive way to remove carbon deposits.
I would not suggest applying oven cleaner {acid} to a set of pistons.
A quality ring grove cleaner can take care of the carbon deposits there. A dishwashing pad made of brass guaze {Chore-Boy ect.} can clean most of the surface stuff on the skirts whithout gouging, and the carbon on top can be scraped with a dull pocket knife. The trick on the top of the piston is to keep a smooth surface, even if it means leaving a thin layer of carbon in some spots.
True: Excessive carbon film on the top of the piston can lead to preignition issues.
And, 'No carbon' is excellent.
But: Scatched surface imperfections on top of the piston will created an area for carbon to collect in that space and will enhance combustion chamber ignition local to that specific area of the piston, rather than allowing a uniform charge ignition across the piston top in that chamber.
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