Okay, tried cleaning engine bay per purdy engine bay thread in show and shine and it worked okay. Warm engine up, rinse with light sprinkle of water, spray simple green everywhere, soak,rinse, repeat. Don't beleive ever cleaned before. Anyway lots of grease, dirt gone but a thin layer of film is on some parts, especially plastic, rubber parts. I can peel some of it off, and scrape it off with finger nails, kinda looks like dandruff. Some of it doesn't want to come off at all. Tried wd-40, engine degreaser, more simple green. What is it? An especially tough layer of dirt/wax/grease? Protectant? Do i just need to let it soak longer before rinsing?
What is a good general purpose engine cleaner that won't react with rough or polished aluminum or intake manifold that i can spray over entire engine minus air filter/intake?
What is a good general purpose engine cleaner that won't react with rough or polished aluminum or intake manifold that i can spray over entire engine minus air filter/intake?