To clean an engine, dust the engine area for loose debris, get the engine warm, but not hot to the touch, seal off any exposed electrical wires/harnesses and air intake areas, spray down with engine cleaner/degreaser (follow container directions), do a final spot clean with a one-inch brush.

You can clean an engine using a degreaser and a power washer. Spray all the dirty parts with the degreaser, then hose it off with the power washer to make the engine shine. You can find more information here: http://www.autopia-carcare.com/inf-engin...