Use WD40, an old toothbrush, and paper towels to clean the carbon off the turbine. Leave the carbon that is adjacent to the turbine blades on the walls( It helps prevent gases leaking around the blades). All other carbon is fair game.

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

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