Is it safe to power wash my car's engine?

If yes ,the engine has to be running?Is it safe to power wash my car's engine?
Sorry, not a good idea because there are a lot of electrical and electronic components under the hood and you are forcing a lot of water under high pressure into all sorts of places. Why not try a degreaser instead? Even then I would still be careful around electronics. Power washing is fine for exteriors.Is it safe to power wash my car's engine?
No do not have the engine running you have a lot of electrical wires that possibly could get wet. Best thing is first cover the alternator with a plastic bag usually a grocery bag, then get some simple green and a small brush and spray down the entire engine bay and use the little scrubber to break up the dirt then lightly hose down the engine and repeat with the simple green. I guarantee you that engine bay will look almost new when finished. When you are all done remove the bag from the alternator start the car and let the engine evaporate the rest of the water....
YES IT IS JUST DON'T STAND TO CLOSE