E90Post
 


GTB Performance
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N55 Downpipe DIY?



Reply
 
Thread Tools Search this Thread
      05-14-2013, 09:09 PM   #45
Ghostryder
Private First Class
Ghostryder's Avatar
United_States
1
Rep
103
Posts

 
Drives: 2013 335i Coupe LMB M-Sport
Join Date: Apr 2013
Location: Northern Virginia

iTrader: (0)

Will be doing my BMS DP on thursday myself, should be fun with my gorilla hands lol
Appreciate 0
      05-15-2013, 01:49 AM   #46
JcLusso
JcLusso
JcLusso's Avatar
United_States
8
Rep
216
Posts

 
Drives: 2011 BMW 335i xDrive
Join Date: Mar 2011
Location: Bethpage NY

iTrader: (1)

when i did it back a year ago it wasn't too bad. I have an xi too haha
__________________

Car: 2011 BMW 335i xDrive
My Websites: Exit Monitor | Boostgram | Cache Ventures
Appreciate 0
      03-07-2014, 07:04 PM   #47
TeinBMW
Lieutenant Colonel
22
Rep
1,811
Posts

 
Drives: 2011 335xi Msport, Conv, Tech
Join Date: May 2013
Location: Calgary

iTrader: (1)

Garage List
2011 BMW 335xi  [3.50]
Not to bad. It's straight forward when you get under the car.
__________________
2011 Le Mans Blue N55 335xi Msport, BMS intake, COBB AP, VRSF Downpipe, VRSF FMIC, ER CP, PE
Appreciate 0
      10-09-2014, 01:41 PM   #48
djfellipe
New Member
djfellipe's Avatar
1
Rep
25
Posts

 
Drives: 2011 bmw 335i xdrive
Join Date: Jun 2014
Location: Marietta, GA

iTrader: (0)

Do you have to drop the subframe for a n55 335xi?
Appreciate 0
      10-09-2014, 03:01 PM   #49
JETmn
Captain
United_States
6
Rep
636
Posts

 
Drives: 2011 335i xDrive Msport
Join Date: Apr 2013
Location: Minneapolis

iTrader: (0)

I am swapping my turbo on a 335xi and I don't think the DP area will be affected. The axles are farther forward, under the compressor of the turbo.
Appreciate 0
      10-10-2014, 03:12 PM   #50
aren93
Second Lieutenant
aren93's Avatar
United_States
3
Rep
299
Posts

 
Drives: 2012 335i M Sport
Join Date: Sep 2014
Location: Los Angeles

iTrader: (2)

I installed the VRSF Downpipe a few days ago and let me tell you it was a bitch removing the stock one. It was my friend and I and it was our first time doing it but he had a lift and all the tools. Took like 4 hours though.
__________________
JB4 - VRSF Catless Downpipe - VRSF Charge Pipe - VRSF 7" FMIC - aFe Intake - Alpina Flash
Appreciate 0
      10-10-2014, 03:44 PM   #51
Schmidty335i
Second Lieutenant
United_States
2
Rep
235
Posts

 
Drives: E92 335i Pure turbo FBO JB4
Join Date: Jun 2014
Location: San Diego

iTrader: (0)

Quote:
Originally Posted by aren93 View Post
I installed the VRSF Downpipe a few days ago and let me tell you it was a bitch removing the stock one. It was my friend and I and it was our first time doing it but he had a lift and all the tools. Took like 4 hours though.
DAMN! i dont have a lift i just have ramps and i took me about half that lol. only part that was kinda a pain for me was breaking loose the clamp that held the dp on. after that it was a breeze. but hey at least you got it on and you got your hands dirty, thats what really matters!
Appreciate 0
      10-10-2014, 06:01 PM   #52
aren93
Second Lieutenant
aren93's Avatar
United_States
3
Rep
299
Posts

 
Drives: 2012 335i M Sport
Join Date: Sep 2014
Location: Los Angeles

iTrader: (2)

Quote:
Originally Posted by Schmidty335i View Post
DAMN! i dont have a lift i just have ramps and i took me about half that lol. only part that was kinda a pain for me was breaking loose the clamp that held the dp on. after that it was a breeze. but hey at least you got it on and you got your hands dirty, thats what really matters!
Yeah I learned a thing or two lol
__________________
JB4 - VRSF Catless Downpipe - VRSF Charge Pipe - VRSF 7" FMIC - aFe Intake - Alpina Flash
Appreciate 0
      10-11-2014, 02:47 PM   #53
Jgcdude1
the bees knees!
United_States
3
Rep
271
Posts

 
Drives: 335i E93
Join Date: Nov 2009
Location: Austin

iTrader: (1)

Garage List
2003 E46 325Ci  [0.00]
2008 E92 328i  [0.00]
2011 E93 335i  [0.00]
Quote:
Originally Posted by aren93
Quote:
Originally Posted by Schmidty335i View Post
DAMN! i dont have a lift i just have ramps and i took me about half that lol. only part that was kinda a pain for me was breaking loose the clamp that held the dp on. after that it was a breeze. but hey at least you got it on and you got your hands dirty, thats what really matters!
Yeah I learned a thing or two lol
By installing the DP and removing the cat, are there any check engines codes that will be thrown?
__________________
335i E93 Le Mans Blue/BMW Performance Shifter
328i E92 Space Gray/BMW Performance Shifter/M-tech Lip/LED Halos
325Ci E46 Titanium Silver
Appreciate 0
      10-12-2014, 01:06 AM   #54
Jsoboti
First Lieutenant
Jsoboti's Avatar
4
Rep
380
Posts

 
Drives: 2011 335i E92 M-Sport 6MT
Join Date: May 2014
Location: Texas

iTrader: (0)

Quote:
Originally Posted by Jgcdude1
Quote:
Originally Posted by aren93
Quote:
Originally Posted by Schmidty335i View Post
DAMN! i dont have a lift i just have ramps and i took me about half that lol. only part that was kinda a pain for me was breaking loose the clamp that held the dp on. after that it was a breeze. but hey at least you got it on and you got your hands dirty, thats what really matters!
Yeah I learned a thing or two lol
By installing the DP and removing the cat, are there any check engines codes that will be thrown?
Yep! And unfortunately for us N55 dudes there is no actual fix like there is for the N54. A JB4 or a Cobb will auto clear the code for us though so it doesn't pop up and annoy you.
__________________
JB4 G5 ISO FF | BMS Performance Intake | BMS Wheel Spacers | VRSF Catless DP | Red CYBA Scoops | Supreme Power Lowering Perches | VRSF Charge Pipe
Appreciate 0
      10-12-2014, 01:37 PM   #55
Jgcdude1
the bees knees!
United_States
3
Rep
271
Posts

 
Drives: 335i E93
Join Date: Nov 2009
Location: Austin

iTrader: (1)

Garage List
2003 E46 325Ci  [0.00]
2008 E92 328i  [0.00]
2011 E93 335i  [0.00]
Quote:
Originally Posted by Jsoboti
Quote:
Originally Posted by Jgcdude1
Quote:
Originally Posted by aren93
Quote:
Originally Posted by Schmidty335i View Post
DAMN! i dont have a lift i just have ramps and i took me about half that lol. only part that was kinda a pain for me was breaking loose the clamp that held the dp on. after that it was a breeze. but hey at least you got it on and you got your hands dirty, thats what really matters!
Yeah I learned a thing or two lol
By installing the DP and removing the cat, are there any check engines codes that will be thrown?
Yep! And unfortunately for us N55 dudes there is no actual fix like there is for the N54. A JB4 or a Cobb will auto clear the code for us though so it doesn't pop up and annoy you.
Yep. Read through the entire thread, does the auto clear feature help with state emission inspections, or did I read things correctly, and you have to install the original down pipe to pass emissions test?
__________________
335i E93 Le Mans Blue/BMW Performance Shifter
328i E92 Space Gray/BMW Performance Shifter/M-tech Lip/LED Halos
325Ci E46 Titanium Silver
Appreciate 0
      10-14-2014, 09:23 AM   #56
ZeroSix
Private First Class
ZeroSix's Avatar
United_States
1
Rep
135
Posts

 
Drives: 2013 BMW 335i
Join Date: Dec 2011
Location: SoCal

iTrader: (1)

Garage List
2013 BMW 335i  [5.00]
You must install OEM cats to pass smog. You will fail automatically with the JB4 on and a catless downpipe due to OBD communication interferences as well as the O2 sensors not coming up as "ready". But I'm pretty sure they'd fail anyone on the spot for the smell it produces. However, I do live in California, where emissions laws aren't strict at all... :
Appreciate 0
      10-26-2014, 04:28 PM   #57
Dan_Q
Private First Class
Dan_Q's Avatar
United_States
1
Rep
104
Posts

 
Drives: 2011 E90 335i Sedan
Join Date: Feb 2011
Location: Colorado Front Range

iTrader: (3)

I am in the middle (end actually) of pulling my stock cat out but I need to disconnect the O2 sensors. Where do they plug in so I can locate the connection and disconnect them?
Appreciate 0
      10-26-2014, 05:33 PM   #58
Dan_Q
Private First Class
Dan_Q's Avatar
United_States
1
Rep
104
Posts

 
Drives: 2011 E90 335i Sedan
Join Date: Feb 2011
Location: Colorado Front Range

iTrader: (3)

Quote:
Originally Posted by Dan_Q View Post
I am in the middle (end actually) of pulling my stock cat out but I need to disconnect the O2 sensors. Where do they plug in so I can locate the connection and disconnect them?
I located the electrical connections for the O2 sensors. You have to remove the engine cover, intake, strut brace and engine under cover and they are attached to a bracket. I disconnected them and dropped them down then disconnected and lowered the stock cat out.

I performed everything for the removal and reinstallation that is shown on post #15 in the order described. That post also has a link to N54 dp removals and I had to use that in order to understand where everything was. Once I got the cat out, the O2 sensors were so tight there would have been no way I could have loosened them while the cat was on the car. I was only able to get the upstream one out after multiple dousings with PB Blaster and switching to a second O2 sensor tool used in conjunction with a breaker bar. In total it took me 5 hours of continuous work and I did it on ramps. No single task was terrible but virtually every task sucked to some degree. Everything worked find except I ended up about a quarter inch short from meeting up with the midpipes (I am using a Wagner catted down pipe). I struggled and strained and got one bolt in then one by one was able to get them in and pull the catback portion of the exhaust forward to close the gap. It felt kind of hokey so I may look into if there is a way to adjust the entire rear exhaust portion forward so it lines up a little better and there isn't so much strain on those flanges.

It was more challenging than I anticipated and I wouldn't want to have to do it again anytime soon.

Last edited by Dan_Q; 10-26-2014 at 11:21 PM.
Appreciate 0
      11-03-2014, 12:29 PM   #59
djfellipe
New Member
djfellipe's Avatar
1
Rep
25
Posts

 
Drives: 2011 bmw 335i xdrive
Join Date: Jun 2014
Location: Marietta, GA

iTrader: (0)

Did mine last week. Took me 4 hours using ramps, jackstands and manual/hand tools. My car is a 2011 355xi sedan. My advice to you:
Lots of CRC Freeze off, a nice set of ratchet, socket and universal joints and a 02 sensor wrench with flexible head.
Appreciate 0
      11-10-2014, 02:09 PM   #60
Hind
///Mmmm
Hind's Avatar
United_States
23
Rep
789
Posts

 
Drives: '09 BMW 135i
Join Date: Jun 2008
Location: Tampa, FL

iTrader: (4)

Garage List
I just installed my n55 catted dp using the info from this thread. thank you!

It's not technically difficult but its "room constraint" difficult. Every bolt, wiggle, turn of a wrench was a pita. I had to take my oem dp to a local muffler shop to remove the o2 sensors (they torched around them to warm the threads up for easier removal). Save yourself some headache and enlist a second person for holding maneuvers.

Car sounds amazing now, totally worth it.
__________________
Current: E90 LCI 335i JetBlack - BMS OCC, JB4 w/ E85, ETS Charge Pipe, Vishnu Catted DP
Retired:///E82 135i LeMans - 12.710 @ 108 MPH
Riss Racing OCC, Shadowline Grills, Magnaflow Axle-Back, JB4, ETS FMIC, BMS DCI, BMW Perf Sideskirts, BMS 12/10 Spacers, E93 Front Sway
PDC Flickr YouTube
Appreciate 0
      11-10-2014, 07:06 PM   #61
Jeef
Captain
United_States
8
Rep
890
Posts

 
Drives: AW E92 335i
Join Date: Nov 2008
Location: San Diego, CA

iTrader: (1)

Get yourself an o2 sensor tool guys!
Appreciate 0
      11-10-2014, 07:58 PM   #62
Hind
///Mmmm
Hind's Avatar
United_States
23
Rep
789
Posts

 
Drives: '09 BMW 135i
Join Date: Jun 2008
Location: Tampa, FL

iTrader: (4)

Garage List
Quote:
Originally Posted by Jeef View Post
Get yourself an o2 sensor tool guys!
Yea it prob would have been much easier with the right tools. It was impossible to hold the dp still while trying to wrench the hell out of it, need a vice also. BTW the muffler shop got it out for free.

I also FWIW i omitted replacing the metal bracket that connects the tranny to the dp, the aftermarket didn't quite line up. Even still with the vband/exhaust attached it was super stiff.
__________________
Current: E90 LCI 335i JetBlack - BMS OCC, JB4 w/ E85, ETS Charge Pipe, Vishnu Catted DP
Retired:///E82 135i LeMans - 12.710 @ 108 MPH
Riss Racing OCC, Shadowline Grills, Magnaflow Axle-Back, JB4, ETS FMIC, BMS DCI, BMW Perf Sideskirts, BMS 12/10 Spacers, E93 Front Sway
PDC Flickr YouTube
Appreciate 0
      11-10-2014, 08:49 PM   #63
Jeef
Captain
United_States
8
Rep
890
Posts

 
Drives: AW E92 335i
Join Date: Nov 2008
Location: San Diego, CA

iTrader: (1)

Quote:
Originally Posted by Hind View Post
Yea it prob would have been much easier with the right tools. It was impossible to hold the dp still while trying to wrench the hell out of it, need a vice also. BTW the muffler shop got it out for free.

I also FWIW i omitted replacing the metal bracket that connects the tranny to the dp, the aftermarket didn't quite line up. Even still with the vband/exhaust attached it was super stiff.
Vice for what?

Unscrew the O2 while DP is still attached next time, I don't think that bracket is needed if I remember correctly... What DP do you have? Some dp's don't have the spot to mount to the bracket anyway!
Appreciate 0
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
Forum Jump


All times are GMT -5. The time now is 11:36 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
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