What parts do I cover on an engine to prevent damage before washing the engine?

what parts do I cover on an engine to prevent damage before washing the engine for a 1989 Jeep Cherokee?What parts do I cover on an engine to prevent damage before washing the engine?
Mostly the high voltage area (spark plug, etc.) and the air intake.





You can use soap and water (even high pressure cleaning). But don't use HOT water as the steam will seep into areas and cause a short.








Good Luck...