Quote:
Originally Posted by Diseasel300
Rain is not driven straight into plugs, gaskets, and orifices at 1700+ PSI either. There's a big difference between wind-blown rain and high pressure directional spray.
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Actually, that's EXACTLY how GM tested them. Not sure about Mercedes but I'd be surprised if they didn't "stress" the underhood bits, too.
That said, I don't deliberately force water where it doesn't need to be but in 50+ years of doing this I've never had an issue other than some Ford distributor caps from the 60s that had to be dried to restart the car. They're better now - my 'Stang has survived many a underhood wash.
After seeing how we tested stuff at GM I haven't given a second thought to pressure washing. It's something one can worry WAY too much about.
Dan