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Hello OP,
I'm a former professional Detailer which includes working out of a Dealer only auction for 14 years. I couldn't begin to guess how many engine bays we detailed but it would be well over 60,000. We never had an issue with such. It's a matter of technique and common sense.
Consequently, I have no reservations about pressure washing an engine bay. The goal is just to quickly rinse off the de-greaser you may have sprayed on it. Also, DO NOT use a water hose because you'll be flooding the engine bay in comparison to a pressure washer. It will take a minimum amount of water for a pressure washer to accomplish what you desire. I'd never recommend the former.
God Bless,
Ralph
Last edited by Ralph III; 04-01-2024 at 10:36 PM..
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