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Old 10-02-2009   #1
Gvr-4
 

Join Date: Dec 2005
Location: st.paul
Posts: 216
what to use to clean pistons in block.

I bough a used block from a guy and the engine was running rich, so there's all this black stuff on it and I was wondering if anyone would know what to use to clean the pistons and side walls with with out damaging anything. anything will help, thanks.
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