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Was it black oil or an oily substance like regular power steering fluid. The coolant used looks oily when drips sometimes. You could have blown an egr cooler real bad and the coolant is overheating coolant coming out of degas. Is there a lot of chalky white residue on degas bottle and on engine below degas bottle?
If it were a blown head gasket that occurred that quickly and drastically I would thin you would have gotten some pretty bad missing after it happened. Honestly I have seen very few blown gaskets that put steam into exhaust that didn't have a bad miss. It's physics. If it.s blown bad enough for water to be blowing by it would only give you 0-50 psi of compression....... Not enough for ignition.
Also, not many head gaskets cause oil to blow out. I could be wrong, but that is my initial analysis.
I would look to see if you can see where water is leaking. If you can't find it I would then pull the egr valve and look at the valve and see if it has black gooey or moist carbon on it. Then shine a light down there and see if there is any standing coolant or moisture at the bottom of where the egr valve goes. The carbon down there should be dry in there. Start there and let us know what you see.
Last edited by divotf15; 02-11-2014 at 02:31 PM.