Re: Black goop coming from head gasket
I've read elsewhere that it is not uncommon for the copper head gasket with unhemmed (inner gasket material exposed) outer edges to weep even when everything else is good.
If the car is running well otherwise, not overheating and no bubbles in the coolant, I would say a can of stop leak will fix your problem.
You could do a combustion gas test to be sure. The kit is ~$35 on amazon.
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