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Old 01-24-2013 | 11:02 AM
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nitroexpress
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Default RE: How to clean engine internals.

ORIGINAL: Car-Tune

I have an OS .18tz modded and I have noticed that when I removed the head off the block the piston is kinda black/dirty and this may of happened for running too lean.

Does anyone know how I could clean that off of my piston without damaging it?

Any help is greatly appreciated.
Dirty black comes from running rich. Whatever method of cleaning you use, be sure not to damage the top edge of the piston. If it's not a massave amount of carbon, just leave it.
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