Question about 2003 Volkswagen New Beetle Convertible
"I assume the chocolate color is an indication of maybe not water leaking into the oil?"
I'll lay $5 on it's being coolant :-)
As for the "overflow cap" or expansion tank filler cap as I would call it, in the absence of a VW engineer telling you different, I would leave it loose while the Stop Leak was taking effect, just to avoid forcing the Stop Leak into the oil system as the coolant system pressurised. If the can says "...works in ten minutes" then you could tighten it after that time.
Be sure to check the coolant level soon afterwards to find out if it has worked.
If the Stop Leak doesn't... I'd recommend getting a mechanic to find the leak and fix it. Left to themselves, things go from bad to worse.
Good Luck, D.
Posted on Jun 30, 2008
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Posted on Jan 02, 2017
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