Hey I was wondering if spraying my engine with WD-40 will clean it at all? I tried it on a bearing and seemed to work pretty well, I also sprayed it on the air filter breathing tube and there was alot of dirt and grime and it seemed to clean it well. Nothing will happen if I spray my engine with Wd-40 will it? I want to spray my entire engine down. not much though, because it is pretty filthy and ive already tried using degreaser and spraying the engine down with water throughly but it didnt do much. I just want a shiny, clean looking engine .