Unknown Leak??????

[essexjet]

I have an 04 F-250 6.0 with about 103,000 miles on it and now have just developed a leak and cant find where its coming from. It is leaking what looks like a water/slight oil mixture on the passenger side of the engine. Any one have any idea where it can be coming from?

 

[F350DRW1]

Does it look like its coming out of the exhaust manifold were it meets the cylinder head? Is it using A/F? These are good signs of an EGR cooler just starting to leak. May want to throw a pressure tester on it.