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E46 Convertible
The E46 vert forum. Talk about dropping your E46 top here.

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Old 12-29-2012, 05:13 PM   #1
wildirish317
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Best way to wash the underbody?

My car arrived in Kentucky from Florida this past fall. We got our first snow yesterday. I assume that it's the first time it's been subjected to road salt.

It's my DD, so I can't just park it for the winter, and I don't want to take it through a car wash (for obvious reasons).

Is there a good way to wash the underbody, other than putting it up on a lift and spraying it?
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I just don't know what I'd do with 560 hp that doesn't involve getting arrested.
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Old 12-29-2012, 06:58 PM   #2
danwilz
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A hose and water is a good start.
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Old 12-29-2012, 07:42 PM   #3
wildirish317
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+1 Yeah, that's obvious. With only 4" of ground clearance, it's a bit of a chore. I have to put it on jack stands to do it.

I'm thinking about making a wand out of 2" pvc pipe with holes drilled in it that I can pass under the car to rinse things off. I was hoping someone had mass produced something like this and it's on the market.
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“The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed.”

Quote:
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I just don't know what I'd do with 560 hp that doesn't involve getting arrested.
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Old 12-30-2012, 07:48 AM   #4
dan_1337
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I thought about this the other day too. I think that the only way is to either take it to a car wash that has an underbody wash (they have these in some places in Australia for 4WDs), or get under the car with a high pressure hose. This would be much easier if you have access to a hoist or jack stands though.
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Old 12-30-2012, 06:44 PM   #5
e4ortysix
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I pull mine up on ramps and clean the front then back on to the ramps and get the back. I get under it and put a rag or mit to the really soiled spots. I tend to get pretty OCD when I detail my car
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Old 12-31-2012, 09:26 AM   #6
sgoetz628
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For the first six years, my car was my DD in Connecticut, where we get plenty of snow and salt. I would take it to the auto car wash - once midwinter, once end of winter. I was just under the car a couple of weeks ago, changing the oil and replacing the oil level sensor, which means taking the protective plate off. The car looks practically brand new underneath. And my top doesn't now, nor has it ever leaked a drop of water.
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Old 01-01-2013, 06:40 AM   #7
Vandyinc
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Don't have to worry about road salt here, but when I use to go Off-roading in my truck, I would place a sprinkler under it to clean the underside. You will probably need a garage to sit in overnight to dry it out afterwards though.
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Old 01-01-2013, 12:30 PM   #8
wildirish317
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Originally Posted by Vandyinc View Post
Don't have to worry about road salt here, but when I use to go Off-roading in my truck, I would place a sprinkler under it to clean the underside. You will probably need a garage to sit in overnight to dry it out afterwards though.
Thanks Vandyinc. I thought of that last night as well. I searched around the garage today and found this:



It works like a charm. I simply use the hose to push the sprinkler 3-4 feet under the car and work my way around all four sides.
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“The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed.”

Quote:
Originally Posted by Mike Miller
I just don't know what I'd do with 560 hp that doesn't involve getting arrested.
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Old 01-09-2013, 05:56 AM   #9
drnknmnky13
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That's a great idea. May have to run to walmart to pick up a wide base flat sprinkler like that.

I can use it on my other cars as well.
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Old 01-24-2013, 11:11 AM   #10
jayb328i
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what a great idea. How stupid could I be not to think of this. May have to open a business advertising underside washes (autos)
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Old 01-24-2013, 11:53 AM   #11
Riverbmr3
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ha ha, i haven't wash my under chassis for ten years
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Old 01-24-2013, 12:14 PM   #12
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Quote:
Originally Posted by wildirish317 View Post
Thanks Vandyinc. I thought of that last night as well. I searched around the garage today and found this:



It works like a charm. I simply use the hose to push the sprinkler 3-4 feet under the car and work my way around all four sides.

thats ****ing brilliant
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Old 01-24-2013, 12:46 PM   #13
soul786
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This might be a dumb question so bear with me, but after washing/rinsing like this, can the freeze do any harm? It's -16 celcius here in Toronto right now
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Old 01-24-2013, 01:13 PM   #14
wildirish317
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what a great idea. How stupid could I be not to think of this. May have to open a business advertising underside washes (autos)
You wouldn't believe how much time I spent on the web, searching for something.

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This might be a dumb question so bear with me, but after washing/rinsing like this, can the freeze do any harm? It's -16 celcius here in Toronto right now
Yeah, I wouldn't do it if it's much below freezing. The salt won't really start attacking your car until it has moisture to work with. If you can get it into a garage overnight to let it dry, it might be better.
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“The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed.”

Quote:
Originally Posted by Mike Miller
I just don't know what I'd do with 560 hp that doesn't involve getting arrested.
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Old 01-24-2013, 05:02 PM   #15
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Quote:
Originally Posted by soul786 View Post
This might be a dumb question so bear with me, but after washing/rinsing like this, can the freeze do any harm? It's -16 celcius here in Toronto right now
NoNo--NO, My suggestion, at -16C degrees I would not think of doing this. I still have bad memories of water getting into the frame of my car from the bottom and the doors all freezing closed--I mean frozen when it was 20 degrees below. I would wait until it gets above or near freezing, and after doing it take the car for a nice joy ride.
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Old 01-25-2013, 10:00 PM   #16
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I think you're over thinking this. Go to a do-it-yourself car wash and use the wand to spray some water underneath. There isn't that much salt used on the roads here (I'm in Louisville) and even if there were, all the steel I'm sure is treated to resist rust. There's a reason you never see any Ziebart franchises any more.
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Old 01-25-2013, 10:12 PM   #17
wildirish317
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Can't argue that. I just hate DIY car washes. Nice ride!
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“The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed.”

Quote:
Originally Posted by Mike Miller
I just don't know what I'd do with 560 hp that doesn't involve getting arrested.
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Old 01-26-2013, 08:45 AM   #18
sgoetz628
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Quote:
Originally Posted by wildirish317 View Post
Thanks Vandyinc. I thought of that last night as well. I searched around the garage today and found this:



It works like a charm. I simply use the hose to push the sprinkler 3-4 feet under the car and work my way around all four sides.


Ha! American ingenuity at its finest. Love it!
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Old 01-26-2013, 09:02 AM   #19
jayb328i
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Just think guys.........the dealer can paint the plastic black instead of yellow, list it in the BMW parts manual as a car under-wash system, and sell it for $150, maybe more.
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Old 01-26-2013, 09:26 AM   #20
tks
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They'll even put the roundel on it and make it spin like a rotor alternating colors, oh the possibilities...
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