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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 04-28-2013, 07:22 PM   #1
DieselMinded
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Ditch the plastic skid plates?

So these big cheap under carriage covers / skid plates

Like the one you remove to drain oil

Any set back to just leaving these off?
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Old 04-28-2013, 07:27 PM   #2
KaktusJaque
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Wondering that myself. I'm sure there is a purpose for them, why else would BMW put them there. But would it be a big deal if they were not there at all?
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Old 04-28-2013, 07:27 PM   #3
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I would think they add to high speed stability... For those time your are driving over 110 or so... But I'd leave them on to protect the alternator from water...
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Old 04-28-2013, 07:29 PM   #4
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Re: Ditch the plastic skid plates?

At best you will end up with a completely FILTHY engine bay. At worst you will end up with a bunch of damaged stuff in your engine bay.......

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Old 04-28-2013, 07:32 PM   #5
DieselMinded
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Mine only has like 4 working screws and when i took it off after my vcg install it had oil all over it , dont know if the new vcg fixed my issue so im planing on removing the covers and degreasing and leaving the covers off to inspect where the oil is coming from

I go threw About 3 quarts each oil change and after a long drive when i stop a little bit of smoke will come from the hood and burnt oil smell in cabin
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Old 04-28-2013, 07:37 PM   #6
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I think it's an extremely bad idea not to have these on. It protects the engine/undercarriage from things damaging it. If something were to fall off a vehicle in front of you on the highway and you can't avoid it (anything: stick, piece of the car, even a soda can) it could potentially bounce up into your engine and hit the belts. This could be very damaging.

I had them off for a couple weeks and was super concerned about something like that happening. First day I put them back on, a stick fell off the trick in front of me, went under my car, and I could hear it bounce off the skid plate.

Does anyone else agree?
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Old 04-28-2013, 07:49 PM   #7
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been w/o for 2 years . they are there to hide the fact that your BMW is leaking oil lol
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Old 04-28-2013, 07:57 PM   #8
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Ditch the plastic skid plates?

This is why you need it:
http://forum.e46fanatics.com/showthread.php?t=972597


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Old 04-28-2013, 10:06 PM   #9
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Quote:
Originally Posted by DieselMinded View Post
So these big cheap under carriage covers / skid plates

Like the one you remove to drain oil

Any set back to just leaving these off?
Any set back to just leaving them on? Doesn't take much to remove and replace.
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Old 04-29-2013, 09:38 AM   #10
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They matter, especially in the snow, salt, etc. Leave them on, it takes little to no effort to remove and replace them.
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Old 04-30-2013, 01:06 AM   #11
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I wish the bugger had an access door to get to the crankcase drain bolt! Other than that, the shields are our friend.
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Old 04-30-2013, 10:56 AM   #12
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Take and hole saw and cut yourself one nothing more..and save time..
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Old 05-01-2013, 09:24 AM   #13
chilone
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Originally Posted by Wreckless View Post
At best you will end up with a completely FILTHY engine bay. At worst you will end up with a bunch of damaged stuff in your engine bay.......

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W3rd!!
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Old 05-08-2013, 06:44 AM   #14
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Finally - someone has cracked the code

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been w/o for 2 years . they are there to hide the fact that your BMW is leaking oil lol
Amid all the speculations of aerodynamic down force, etc., this is the explanation that makes the most sense.

Before BMW got into competition with Lexus, et al, there were no underbody panels, and 1970 2002 tii's ran as fast as anything. If you got an oil leak you either fixed it, or explained it away as part of the charm of the 'BMW experience.' But the Japanese luxury/performance cars either didnt leak or had the panel installed under the engine, so BMW had to follow suit.

So was it engineers who came up with this idea? No! Marketing!
They're the ones who come up with a lot of the 'innovations' that we forum members like to attribute to engineers!!

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Old 05-08-2013, 06:57 AM   #15
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Ditch the plastic skid plates?

It's called ducting, and BMW does it very well. Why not have it ?


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Old 05-08-2013, 08:49 AM   #16
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Amid all the speculations of aerodynamic down force, etc., this is the explanation that makes the most sense.

Before BMW got into competition with Lexus, et al, there were no underbody panels, and 1970 2002 tii's ran as fast as anything. If you got an oil leak you either fixed it, or explained it away as part of the charm of the 'BMW experience.' But the Japanese luxury/performance cars either didnt leak or had the panel installed under the engine, so BMW had to follow suit.

So was it engineers who came up with this idea? No! Marketing!
They're the ones who come up with a lot of the 'innovations' that we forum members like to attribute to engineers!!

I'm not sure if this is serious or sarcasm...
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Old 05-08-2013, 01:30 PM   #17
Kubica
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I'm not sure if this is serious or sarcasm...
Because '70s engine bays were filled with all sorts of expensive electronic sensors, traction control modules, and all those computers.
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Old 05-08-2013, 10:29 PM   #18
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Ditch the plastic skid plates?

I am amazed at the amount of members that don't know what they are talking about and yet argue against factual sciences. If you don't know what your talking about, why is it so hard to look at another perspective? Possibly one that makes sense? Not that because I did it, so it's ok. Fact is this particular question has been asked a few times recently. Because of the ducting the car has, it still receives fantastic airflow. What doesn't happen is the addition cooling of the engine by funneling air out past the oil pan. Instead airflow terminated before it hits the fan and just swirls around. Thus is why you get dirt in there. Additional the fan is really not working at all, due to the fact it's pulling cold air from the bottom instead of hot air off the radiator. But hey the car doesn't over heat, so who cares right. Cause the same guys who made my moms Buick used the same engineering here. So flame away with some idiotic perspectives... Seems to be a theme


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Old 05-08-2013, 10:42 PM   #19
White_Knuckles
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^^ Um, I think they put 'em on there to keep varmints and critters from gettin' in there and messin' up yer fan.

I drove 40 miles one time in the Studebaker fer I noticed a goat done got lodged in ma air cleaner.

nuff said.
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Old 05-08-2013, 11:35 PM   #20
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^^ Um, I think they put 'em on there to keep varmints and critters from gettin' in there and messin' up yer fan.

I drove 40 miles one time in the Studebaker fer I noticed a goat done got lodged in ma air cleaner.

nuff said.
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