I used to be a fan of doing this until one time I had a big problem. Ended up with a misfire that cost me a few hundred to fix and a lot if down time. Was not a jeep.
Engine bays are designed to get wet to an extent. If it were me, I would avoid high pressure or a lot of water flow but instead, mist it on. But that's just me.
Someone on here must have professional detailing experience and could help.