I want to pressure wash my engine compartment. I have had it done as part of a professional cleaning at Marathon ,but never myself. I have purchased a neat little 2000 PSI electric pressure washer and want to get in there and clean it up from time to time.

What is the rule of thumb here, hot, cold, what needs to be protected, do's and don'ts

Trucker told me that hot was ok, and nothing would be an issue, but i want the POG answer on this one.