I have used the citris cleaner from GUNK, let the motor get warm from driving around. Take the car to a do it yourselve car wash, pop the hood and spray the cleaner on the motor while running. With the heat from the motor it helps loosen up the grime pretty good, give it 10min it should start smoking a bit from the running engine. Then power wash the motor, there should be no need for scrubbing...and at all times do not shut the engine off while rinsing. After the wash let the car run also rev it up a bit this helps dry the motor off. When that is done dry off the areas that are still wet with a rag. The motor should look great
After that I like to apply WD40 spray to the black hoses to accent the engine bay.
Good luck!
