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Old 12-14-2008, 07:12 PM   #16
slimjim
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Sorry Dinan_M5 pressure washing is the worst possible way to wash your engine bay. The high pressure will eventually find a weak spot in rubber seals and destroy them. I always wash my engine bay with some type of degreaser agent followed by warm water and soap. After that I rinse the engine compartment and use compressed air to get rid of the remaining water.
wrong, i do it to the e30 teice a month in warmer weather and i have NEVER had any problems, and wat rubber seals would u be spraying exactly? and if they are falling apart, means its time to replace them.
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Old 12-14-2008, 07:21 PM   #17
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wrong, i do it to the e30 teice a month in warmer weather and i have NEVER had any problems, and wat rubber seals would u be spraying exactly? and if they are falling apart, means its time to replace them.
How can I be wrong when you speak to mechanics that work on these vehicles tell you not to do it.
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Old 12-14-2008, 07:22 PM   #18
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, and wat rubber seals would u be spraying exactly? .
The ones around your electrical connections.
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Old 12-14-2008, 07:44 PM   #19
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How can I be wrong when you speak to mechanics that work on these vehicles tell you not to do it.
how can i be wrong when ive done this to multiple cars, both new and old, and nothing has ever happened.

just avoid the ecu and be carefull of any wires.
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Old 12-14-2008, 07:54 PM   #20
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how can i be wrong when ive done this to multiple cars, both new and old, and nothing has ever happened.

just avoid the ecu and be carefull of any wires.
Because you got lucky. I did it in my E30 had problems did it on my e36 had problems not every time mind you, however that one time is too much.
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Old 12-25-2008, 01:07 AM   #21
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ummm, when i got my car back from bimmersport Charlie said i can clean it with water, just avoid the electrics with a bag or something and it should be fine.
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Old 12-25-2008, 02:13 AM   #22
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I believe its comming down to personal preference and experience. The fact is that either way you wash it, you gotta cover up the electrical components.
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Old 04-17-2009, 12:03 AM   #23
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Spray first with degreaser, brush if needed, than wash with hose all over, avoid water near ignition/ electronic parts, you can use just regular towel to cover parts you dont want to be watered, wipe out and let it dry.
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Old 04-17-2009, 10:03 AM   #24
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I pressure wash the range Rover's engine bay after a day out in the mud. Never had any issues.
I don't DARE wash the M5 engine, I just polish it up with a rag and a degreaser.
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Old 04-17-2009, 11:32 AM   #25
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Old 04-17-2009, 11:47 AM   #26
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I have wondered this myself for a while. Up until now all I have done is just get some rags and wipe all the dirt off.
How safe is it exactly to pressure wash? what happens if i spray the alternator or the water gets into some connections?
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Old 04-17-2009, 12:29 PM   #27
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I pressure wash the range Rover's engine bay after a day out in the mud. Never had any issues.
I don't DARE wash the M5 engine, I just polish it up with a rag and a degreaser.
Pussy. Wash that shit.


Use 303 Aerospace protectant to finish up with. You can get it from Canadian tire.
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Old 04-17-2009, 08:02 PM   #28
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Use 303 Aerospace protectant to finish up with. You can get it from Canadian tire.
Best stuff out there hands down!
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Old 04-18-2009, 06:28 PM   #29
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I bought a new pressure washer yesterday. They're on sale at canadian tire. On the pressure washer it tells you not to spray the pressure washer with the stream. So, do you really want to pressure wash your engine?
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Old 04-18-2009, 07:15 PM   #30
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