Join Date: Oct 2009
Location: Gloucester, MA
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As stated above, you have water in your oil. Chances are that you have a headgasket problem but it makes sense to do some diagnosis first. I would start with a compression and leakdown test.
If you don't have a compression tester, one thing that you can do is put a section of clear tubing in the cooling water line after the engine and observe whether it is filling with bubbles (combustion gases). If it is indeed the head gasket, the bubbles should stop once you hit the decompression lever. If there are no bubbles, there is still a chance that you have a blown headgasket between the cooling and oil passages and not the cylinder but this is quite rare.
If your headgasket checks out, I would start checking things like your water pump, cooling passages, etc.