Steam cleaning engine?
 

Is doing this bad for the engine, any negative effects?

I would be kinda leery steam cleaning these later model engines. With all the sensors and electrical crap nowadays, I would think the high pressure from a steam cleaner wouldn't be advantageous or friendly to the systems.

I would go with gunk and a garden hose rinse.

I was thinking along the same lines as you, just wanted some other thoughts to be sure. Im gonna go with gunk and rinse. Thanks for the response!