A friend of mine suggested using scrubbing bubbles to clean the engine, followed by some citrus detailer. Easy as pie and great results. Just spray the bubbles on and let them work in for a while, rinse it really good, and dry it off. Once its dry spray the detailer on and let dry for 20 mins, then let the car idle for a little while to heat up and even out the detailer. The detailer is still a little wet in the pic, but once it dries it evens out and looks killer.