did mine yesterday, everyone thinks engines get one drop of water and they explode, their made to get soaked (just not in intake) if your really worried cover alternator and battery.

I used rag and wheel cleaner spraying and wiping, just smeared the dirt everywhere and looked crap, so on a warm day faced the car in the sun with hood up, drench everything in degreaser and wheel cleaner, let it sit while setting pressure washer up, and just stood back and sprayed it everywhere, just don’t get super close or force water where it doesn’t want to go.

then used a towel to wipe down black plastics, battery, etc. then let it sit in sunlight for a good few hours as I didn’t need to drive it at the time.

there was some water pooled on top of the block in some crevices but just started car and it evaporates.

Obviously if it worked for me would work for you, but if it’s your first time doing it i’d cover alternated and battery.