F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Cosmetic Maintenance: Wash, Wax, Detailing, Repairs > Forgot drainage?
European Auto Source (EAS)
Post Reply
 
Thread Tools Search this Thread
      08-21-2019, 10:01 AM   #1
BWbimmer
Second Lieutenant
BWbimmer's Avatar
Germany
47
Rep
226
Posts

Drives: BMW F36, E46, E36
Join Date: Jul 2019
Location: Germany

iTrader: (0)

Garage List
Forgot drainage?





Why ist this happening and is in only on my car? I expected som dainage holes?
__________________
Such Fun
If you finde any writing errors in my post you do not need to return them, please keep them
Appreciate 0
      08-21-2019, 11:51 AM   #2
Billfitz
Major General
Billfitz's Avatar
United_States
3255
Rep
7,807
Posts

Drives: '15 328iX GT
Join Date: Jan 2015
Location: New Hampshire

iTrader: (0)

Mine is the same way, they probably decided that it wasn't worth the bother when evaporation would do the same job. It's not like there's anything that will rust.
Appreciate 0
      08-21-2019, 01:40 PM   #3
Machinebuilder
Private First Class
Machinebuilder's Avatar
United_States
98
Rep
164
Posts

Drives: 640 IX GT MS, 440IX 6MT Coupe
Join Date: Feb 2014
Location: Northeast USA

iTrader: (0)

It is a strange design but there are no drain holes. And they use it on many models. Their engineers must have their reasons but its is odd.
Appreciate 0
      09-02-2019, 07:02 AM   #4
Skyhigh
Major
Skyhigh's Avatar
375
Rep
1,118
Posts

Drives: BMW F36
Join Date: Apr 2018
Location: Europe

iTrader: (0)

Has been discussed around here before. (If someone finds the link, please post it).

Bottomline:
- Design is as is, as the same plastic molding is used both for LH and RH vehicles (reversed wipers)
- No drain holes is a weird design decision, but a fact
- Some users have drilled holes in there with no negative effect observed.

I am inclined to do the latter, but would like to know what is underneath and whether the water has a safe path out...?
__________________
"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
Appreciate 0
      09-02-2019, 08:47 AM   #5
Billfitz
Major General
Billfitz's Avatar
United_States
3255
Rep
7,807
Posts

Drives: '15 328iX GT
Join Date: Jan 2015
Location: New Hampshire

iTrader: (0)

And there's the rub. Water on plastic, no harm done. Water on metal = corrosion.
Appreciate 0
      09-15-2019, 09:12 AM   #6
RAK92
Second Lieutenant
United_States
72
Rep
209
Posts

Drives: 2016 435i Coupe M Sport
Join Date: Oct 2015
Location: Chesapeake, VA

iTrader: (0)

Yep, this is normal. There are no drain holes. Again, someone posted a pic with a hole drilled into the plastic to allow the water to drain. I just don’t know what’s underneath so not sure if that’s a safe option.

Every time I was my 2016 435i, after rinsing, I immediately open the hood and take an old towel and blot out the pooled water in those areas first. It’s not just become a habit to get that water out.
Appreciate 0
      09-25-2019, 06:00 AM   #7
1QuikWS6
No 55mph
1QuikWS6's Avatar
United_States
1139
Rep
7,814
Posts

Drives: F32 435ix MSport ->M6
Join Date: Jul 2009
Location: Blitzburgh, PA

iTrader: (103)

Garage List
2016 BMW 435ix  [0.00]
Quote:
Originally Posted by RAK92 View Post
Yep, this is normal. There are no drain holes. Again, someone posted a pic with a hole drilled into the plastic to allow the water to drain. I just donít know whatís underneath so not sure if thatís a safe option.

Every time I was my 2016 435i, after rinsing, I immediately open the hood and take an old towel and blot out the pooled water in those areas first. Itís not just become a habit to get that water out.
I drilled a hole on my 435 - the water will then drain down to the lower piece of plastic exactly where the little 'funnel' is that directs rest of water down thru the normal drain route to underneath the car

Been that way for yrs, no harm done, there is nothing in the path of the water draining that will get damaged

Just because BMW didn't put one there originally doesn't mean that putting a hole in is a bad thing - there is a TSB out for the very bottom drain vent that BMW DID put in that needs to be removed due to the fact that it clogs and water will NOT drain completely - so it's not like BMW engineering is foolproof
__________________
F32 435ix//Mineral Gray Metallic//Black Dakota Leather//Alum Blade Trim//M Sport Pkg//Prem Pkg//Tech Pkg//Driver Assist Pkg//Lighting Pkg//Cold Weather Pkg//Dyn Handling Pkg//HK Sound+BavSound Stg2//763M Wheels//M4 Mirrors w/OEM CF Covers//MPerf Pedals-CF Rear Spoiler-LED Sills-CF Shift Knob/Surround/IND M4 Alcantara Armrest//MPE w/CF Tips+CGP VSC-1//Dinan CF Intake//PURE S2 Turbo//AA FMIC//ER CP+TIC//3.5bar TMAP/DV+//AA OBD Flash Tune Stg2
Appreciate 0
      09-25-2019, 05:12 PM   #8
Skyhigh
Major
Skyhigh's Avatar
375
Rep
1,118
Posts

Drives: BMW F36
Join Date: Apr 2018
Location: Europe

iTrader: (0)

Could you provide a photo of your drainage?
__________________
"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
Appreciate 0
      10-17-2019, 08:22 PM   #9
sunshine235
Enlisted Member
United_States
5
Rep
38
Posts

Drives: 2020 BMW 440i xDrive
Join Date: Oct 2019
Location: Southeast

iTrader: (0)

Quote:
Originally Posted by 1QuikWS6 View Post
I drilled a hole on my 435 - the water will then drain down to the lower piece of plastic exactly where the little 'funnel' is that directs rest of water down thru the normal drain route to underneath the car

Been that way for yrs, no harm done, there is nothing in the path of the water draining that will get damaged

Just because BMW didn't put one there originally doesn't mean that putting a hole in is a bad thing - there is a TSB out for the very bottom drain vent that BMW DID put in that needs to be removed due to the fact that it clogs and water will NOT drain completely - so it's not like BMW engineering is foolproof
You mean none that YOU CAN SEE!! Yes, it is there.
Appreciate 0
      10-17-2019, 08:24 PM   #10
sunshine235
Enlisted Member
United_States
5
Rep
38
Posts

Drives: 2020 BMW 440i xDrive
Join Date: Oct 2019
Location: Southeast

iTrader: (0)

Quote:
Originally Posted by BWbimmer View Post




Why ist this happening and is in only on my car? I expected som dainage holes?
I see LOTS of RUST!!! Better take care of that!!!
Appreciate 0
      10-17-2019, 10:33 PM   #11
Billfitz
Major General
Billfitz's Avatar
United_States
3255
Rep
7,807
Posts

Drives: '15 328iX GT
Join Date: Jan 2015
Location: New Hampshire

iTrader: (0)

Since when does plastic rust? All I see is dirt.
Appreciate 0
      10-21-2019, 09:27 PM   #12
ProjectBoost
Mod addict
ProjectBoost's Avatar
United_States
606
Rep
1,247
Posts

Drives: Black AWD N55
Join Date: Feb 2018
Location: NC

iTrader: (17)

It is dirt. He is mistaking the reflection on the left side for rust.
__________________
316 RWHP/428 RWTQ
Appreciate 0
      11-12-2019, 06:32 PM   #13
ian332isport
Lieutenant
ian332isport's Avatar
United Kingdom
281
Rep
551
Posts

Drives: F31 340i Shadow Edition
Join Date: Jun 2018
Location: UK

iTrader: (0)

My F31 has drainage slots/holes from the factory. September 2018 build.
Appreciate 0
      11-13-2019, 05:12 AM   #14
Skyhigh
Major
Skyhigh's Avatar
375
Rep
1,118
Posts

Drives: BMW F36
Join Date: Apr 2018
Location: Europe

iTrader: (0)

Photos please.
__________________
"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
Appreciate 0
      11-13-2019, 04:44 PM   #15
ian332isport
Lieutenant
ian332isport's Avatar
United Kingdom
281
Rep
551
Posts

Drives: F31 340i Shadow Edition
Join Date: Jun 2018
Location: UK

iTrader: (0)

Quote:
Originally Posted by Skyhigh View Post
Photos please.
I'll snap some pics if it ever stops raining.
Appreciate 0
      11-14-2019, 08:29 AM   #16
ian332isport
Lieutenant
ian332isport's Avatar
United Kingdom
281
Rep
551
Posts

Drives: F31 340i Shadow Edition
Join Date: Jun 2018
Location: UK

iTrader: (0)

Here you go.


Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:56 PM.




f30post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST