E90Post
 


 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > White smoke coming from cats?



Reply
 
Thread Tools Search this Thread
      10-22-2020, 01:00 PM   #1
Kylee90
New Member
3
Rep
7
Posts

Drives: Bmw 2007 328xi
Join Date: Oct 2020
Location: Clayton,New Jersey

iTrader: (0)

Question White smoke coming from cats?

Hey guys so I just came here to try and get some advice and insight on what might be going on with my car and what to do with it. I have a 2007 328xi with 97k miles on it. Recently after upgrading to an afe cold air intake I popped a few codes and found out my maf was faulty so I fixed that, therefore no ses light on the dash. A few thousand miles ago I was getting white smoke coming from my air vents and the back left of the engine which was diagnosed as oil leaking from my vgc. 700$ later my local mechanic replaced the vcg and all was well. Now at 97k miles I am experiencing the same exact problem with white smoke coming from the same spot. While checking under the hood to maybe diagnose the problem, I noticed that there was still residual oil and grease left over after the vcg replacement. Could this oil leak be from my shop not cleaning the valve cover and the left over oil and grease is just burning off ? Or am I dealing with a different problem? Tomorrow I’m gonna try deep cleaning the engine bay to get rid of as much of that gunk as I can to see if that will make a difference. Let me know your thoughts I’m in need because I’m trying to sell my car soon and want everything to be as good as possible !
Appreciate 0
      10-22-2020, 01:06 PM   #2
BSM n54iS
Brigadier General
BSM n54iS's Avatar
2685
Rep
4,203
Posts

Drives: '11 335is | '16 Macan Turbo
Join Date: Aug 2015
Location: Everywhere and Nowhere

iTrader: (7)

Local mechanic? So not an indy? I would say exact same problem.
__________________
'11 335is BSM MT "BMW Performance Editon" | '16 Porsche Macan Turbo
GruppeM CF Intake | AR Resonated DP | ER CP | Turbosmart RacePort BOV | Cobb FMIC | RB Inlets | RB External Mishi/Turner OCC | Michelin PS4 | BMW Performance Springs/Bilstein B8 + Dinan & M3 bits | BMW Brembo BBK | BMW Performance CF Spoiler | BMW Performance CF Lip | BMW Performance Alcantara | PS Designs GTS Armrest | AG H6-40 | Rear Seat Delete
Appreciate 0
      10-22-2020, 01:49 PM   #3
nsjames
Brigadier General
2443
Rep
4,330
Posts

Drives: 08 328xi Touring
Join Date: May 2017
Location: ohio

iTrader: (0)

clean it.

see if it comes back?

sure seems the logical way to diagnose it.
Appreciate 0
      10-22-2020, 03:12 PM   #4
Buug959
Captain
Buug959's Avatar
Ukraine
18075
Rep
873
Posts

Drives: 335xi E90, GMC Sierra, VW Golf
Join Date: Jun 2020
Location: Nova Scotia

iTrader: (0)

Did he replace just the gasket or did he replace the valve cover at the same time? My indy will NOT replace just a valve cover gasket. He says the plastic valve cover gets very brittle from all the heat cycles and it is nearly impossible to change the gasket without cracking the valve cover no matter how careful you are. Even a tiny crack will grow with subsequent heat cycles and then you have another oil leak. So if that is the case you may very well have the same problem all over again.
__________________
Wha' da ya mean? No brakes never stopped anyone before!
Appreciate 0
      10-22-2020, 04:41 PM   #5
Kylee90
New Member
3
Rep
7
Posts

Drives: Bmw 2007 328xi
Join Date: Oct 2020
Location: Clayton,New Jersey

iTrader: (0)

Quote:
Originally Posted by BdSM n54iS View Post
Local mechanic? So not an indy? I would say exact same problem.
Yes to clarify MY Indy mechanic. Sorry I’m new to the forums so I need to get up to date on my terms lol
Appreciate 0
      10-22-2020, 04:43 PM   #6
Kylee90
New Member
3
Rep
7
Posts

Drives: Bmw 2007 328xi
Join Date: Oct 2020
Location: Clayton,New Jersey

iTrader: (0)

Quote:
Originally Posted by nsjames View Post
clean it.

see if it comes back?

sure seems the logical way to diagnose it.
That’s what I was thinking, plan is to clean it tm so I’ll lyk what happens
Appreciate 0
      10-22-2020, 04:46 PM   #7
Kylee90
New Member
3
Rep
7
Posts

Drives: Bmw 2007 328xi
Join Date: Oct 2020
Location: Clayton,New Jersey

iTrader: (0)

Quote:
Originally Posted by LemansE90335xi View Post
Did he replace just the gasket or did he replace the valve cover at the same time? My indy will NOT replace just a valve cover gasket. He says the plastic valve cover gets very brittle from all the heat cycles and it is nearly impossible to change the gasket without cracking the valve cover no matter how careful you are. Even a tiny crack will grow with subsequent heat cycles and then you have another oil leak. So if that is the case you may very well have the same problem all over again.
I’m gonna have to check the service record to clarify this but I’m pretty sure he just replaced the gasket not the actual plastic valve cover.
Appreciate 1
Buug95918075.00
      10-23-2020, 09:58 PM   #8
Kylee90
New Member
3
Rep
7
Posts

Drives: Bmw 2007 328xi
Join Date: Oct 2020
Location: Clayton,New Jersey

iTrader: (0)

Quote:
Originally Posted by Kylee90 View Post
I’m gonna have to check the service record to clarify this but I’m pretty sure he just replaced the gasket not the actual plastic valve cover.
So update...my Indy shop had “valve cover set” written on the invoice so I’m assuming that means cover and gasket? But anyways I did a deep clean of the engine and topped off all my fluids and the car runs amazing now. Haven’t seen any white smoke since, and I was driving my car pretty hard td to see if I could make it f*ck up lol. Thanks for all your help guys !
Appreciate 1
Buug95918075.00
Reply

Bookmarks

Tags
e90, valve cover, valve cover leak, white smoke


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 02:58 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, 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