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oily sludge substance!?!??? :S

1208 Views 14 Replies 7 Participants Last post by  spoolie
so im puzzled....

i pulled my head the other day, to find a black oil/tarry substance on 3 of the four pistons, the engine has less than 1k on it since the complete overhaul,

the one piston that didnt have the oily substance on it looked brand spanking new!

any ideas what might of caused the oily substance?

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probably that bottle of seafoam that was in the back seat...and some east tennessee boys after a night of drinking...
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