I usually clean my engine bay with simple green and wipe it down. As for under the engine cover I would do the same just be careful where you are spraying.Burns1210 wrote:What's a safe way to clean under the plastic engine cover on an 03 - 08? I keep the rest of the engine very clean, but whenever I remove that cover, I want to puke. Is it safe to spray down with degreaser and a hose? I'm thinking NO since the spark plugs are there.