How do you clean a car engine?

Beware! Cleaning a car's engine might be illegal in your state as per EPA directive, please check your local state laws before trying to clean an engine as the waste from an engine clean can be toxic and needs to be properly disposed off, there are a handful of EPA approved car wash businesses around that you can take your car to for a clean. If it is allowed in your state then warm up your cars engine shut it off cover the car's ECU, spark plugs and wires with plastic and then either use a steam cleaner or waster in a bucket (with car de-greaser and then car wash shampoo) and clean away be sure you leave the hood open so the engine air dryes.