Thanks for the advice and tips for the leak down test. The wetness on the outside of the engine is oil, not coolant. I'm not really sure where it came from, possibly the valve cover and a strange twist of fate of two non related problems at once. I plan on doing the leak down test tomorrow. I rigged up my compression tester to pressurize the cylinder. On a side note, is it normal with diesels to see the intake manifold extremely oily? When I removed it, oil dripped from the runners it was so oily. At first I thought maybe that was where the oil on the exterior came from but that would imply an intake leak and the car ran great.