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  #16  
Old 03-30-2017, 12:01 PM
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Been using a 3100 psi power washer for years on ALL my cars, Benz diesels and US cars. Never had a problem. Fast, easier than all other methods I've tried and I'll keep doing it. I never put the pressure stream on electrical components and use Break Free on linkages after.

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  #17  
Old 03-30-2017, 02:36 PM
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Quote:
Originally Posted by Bob338 View Post
Been using a 3100 psi power washer for years on ALL my cars, Benz diesels and US cars. Never had a problem. Fast, easier than all other methods I've tried and I'll keep doing it. I never put the pressure stream on electrical components and use Break Free on linkages after.
What is "Break Free"??
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  #18  
Old 04-01-2017, 01:10 AM
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Originally Posted by HuskyMan View Post
I'm looking at pressure washers to use to clean the engine bay, both top and bottom. I'm thinking of using a presoak of Simple Green or some other brand of degreaser then scrubbing lightly with a brush to loosen the grease and grime. I'd also like to use the pressure washer to clean the driveway, roof, brick and vinyl siding, wood and vinyl decking, etc.

Question: is 3000 PSI too much power to clean an engine? Could water sprayed at 3000 PSI sprayed into an engine bay hurt or harm either the engine or electrical components?

Would I be better off with a 1700 PSI rig? Your opinion is appreciated.....
I've been down the pressure washing PSI road before. Stick to 1200-1300 PSI for the engine compartment, staying at least 2 feet away from fragile areas at that PSI. 1700 is way too high, don't get that anywhere near your paint!
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Old 04-01-2017, 01:13 AM
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Originally Posted by ROLLGUY View Post
I have used the high pressure wash at my local coin-op car wash MANY, MANY, MANY times on engines and bays with ZERO issues. Of course I don't purposely force the spray tip into any electrical components, but everything else is fair game as far as I am concerned.
Others have said not to use purple cleaners, being concerned about aluminum. Based on my extensive experience, my opinion is that they are the best!
Check out: The best degreaser on the planet!
Usually the pressure is controlled by the motor on these pressure washers. But you can install more restrictive and various spray-pattern type nozzles, especially with the Karcher. Be most wary of the 'spin' type nozzle, as that's the roughest one. It's ideal for cutting through the grease and grime of diesel engines in the engine bay and under the car as well
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  #20  
Old 04-01-2017, 03:18 PM
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One of the more stupid things I've done with a pressure washer was to point it at the radiator from in front to get out the road dirt and insects. The spray folded over the cooling fins on the radiator. One of the smarter things I've done is to plan ahead and take the car for a long ride just after washing it to dry it off with engine, brake heat and the wind.

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