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Dado 540
12-10-2008, 04:42 PM
Hey fellas,

Do you wash you 5ers engines? How do you go about it, with all the electical and ECU in there it scares me to plash it with water.

prince1
12-10-2008, 05:18 PM
Ya I was wondering about this as well

Gamite
12-10-2008, 05:21 PM
I just splash it. :)

I don't use any kind of pressure washers, just the hose

europrince
12-10-2008, 05:41 PM
^ i did the same..plus some elbow grease.

Dado 540
12-10-2008, 09:54 PM
What about the ECU, the starter, alternator, . . .?

MiroE36
12-10-2008, 10:42 PM
my friend just hoses down his engine then uses a cloth to polish it (taking off most of the dirt). He literally hoses down the whole engine bay, then gets to work... then just starts the car and moves on... it never affected anything. Mind you this is a honda civic, so I don't know if the same is correct for BMWs

Bullet Ride
12-11-2008, 12:02 AM
Been pressure washing the engine bay of both 5ers once a year since we got them. Haven't had any problems and it keeps the engine bay looking like this*th-up*

328i Cab
12-12-2008, 05:04 PM
Pressure washers are generally better (because you use less water and can control the flow a bit easier). Just don't spray the electrical components directly, especially the ECU, throttle body, mafs, alternator etc. Seen a few cars get a bit of water in the intake (happened on my cadillac back in the day) - just let it run for a few mins and it should burn off. Just use as little water as possible.

Gamite
12-12-2008, 05:15 PM
But pressure washers can potentially squeeze their way into seals that you don't want water to get into.

Use a mild engine degreaser and a paint brush to loosen the dirt.

doogee
12-12-2008, 05:47 PM
Brake caliper cleaner works well too.

///Maluco
12-12-2008, 05:59 PM
I use a pressure washer and dry it using compressed air....no problems here!

328i Cab
12-12-2008, 06:36 PM
But pressure washers can potentially squeeze their way into seals that you don't want water to get into.

Use a mild engine degreaser and a paint brush to loosen the dirt.

Yes, use a soft brush and don't hold the pressure washer for any length of time over any area with electronics. Use it in a quick back and forth motion over the area (hope that makes sense).

Trouble65
12-14-2008, 07:45 PM
Been pressure washing the engine bay of both 5ers once a year since we got them. Haven't had any problems and it keeps the engine bay looking like this*th-up*


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.

rider-.
12-14-2008, 08:06 PM
i use tireshine on all the plastic parts... hose everything else down.. turns out looking nice

slimjim
12-14-2008, 08:10 PM
i power was the shit out of my engine bay in the e30, never had any problems, i normally just wrap a bag around my cone filter.

slimjim
12-14-2008, 08:12 PM
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.

Trouble65
12-14-2008, 08:21 PM
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.

Trouble65
12-14-2008, 08:22 PM
, and wat rubber seals would u be spraying exactly? .

The ones around your electrical connections.

slimjim
12-14-2008, 08:44 PM
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.

Trouble65
12-14-2008, 08:54 PM
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.

Bavaria
12-25-2008, 02:07 AM
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.

Dado 540
12-25-2008, 03:13 AM
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.

juzer
04-17-2009, 01:03 AM
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.

bmwm5lover
04-17-2009, 11:03 AM
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.

MiroE36
04-17-2009, 12:32 PM
I drive my car into a lake and drive out, and i'm good :D

328IScreamer
04-17-2009, 12:47 PM
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?

Gamite
04-17-2009, 01:29 PM
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.

zubbie
04-17-2009, 09:02 PM
Use 303 Aerospace protectant to finish up with. You can get it from Canadian tire.

Best stuff out there hands down!

NipponM5
04-18-2009, 07:28 PM
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?

Dado 540
04-18-2009, 08:15 PM
How much?

Bullet Ride
04-18-2009, 09:57 PM
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?

Yes.

NipponM5
04-19-2009, 08:38 AM
How much?

Usually $279 or something ...on for $119 and it has a built in dry/wet vac.