A better approach is to use a low-pressure wash with a degreaser specifically designed for engines. Make sure to:
* Protect sensitive components: Cover the alternator, distributor (if applicable), air intake, and any other electrical components with plastic bags or covers. Also, cover the engine's computer module (PCM) very carefully.
* Use the right cleaner: Choose a degreaser that's safe for engine components and follow the instructions carefully.
* Avoid direct spraying: Don't spray directly onto electrical connections or sensitive areas. Use a gentle stream and focus on cleaning the major components.
* Let it soak: Allow the degreaser to work for a few minutes before rinsing.
* Rinse thoroughly: Use low-pressure water to rinse away all the degreaser. Make sure to thoroughly dry any areas that might retain water.
* Let it dry completely: Allow the engine to air dry completely before starting it.
Failure to follow these precautions could lead to electrical shorts, damage to seals, or other problems. If you're not comfortable doing this yourself, it's best to take your vehicle to a professional detailer.
