E90Post
 


Bimmer Retrofit
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > V-Band kicking my butt!!



Reply
 
Thread Tools Search this Thread
      09-06-2012, 10:27 PM   #1
redefined
Private First Class
redefined's Avatar
1
Rep
124
Posts

 
Drives: 07 335i & 2002 325i
Join Date: Jun 2012
Location: ATL

iTrader: (1)

Send a message via AIM to redefined
V-Band kicking my butt!!

Installed VRSF downpipes last weekend and had a leak, but figured I would during the install. I couldn't get the stock bolts back in the v-bands so ended up using longer ones. There was still 1-1.5" between the ends of the v-band when tight so I figured it'd leak, yup sure did.

Today I took the bolts back out of the downpipes and put the stock bolts back in, yay! Well only 1 I could get the ends of the clamps to go almost together, like stock. The other I turn a handful of times and it gets super tight. Guessing that the v-band just isn't fully seated somehow. With the bolt out I grab the clamp and shake but it doesn't budge at all.

Any suggestions? Trying to not fully uninstall the entire downpipe (if so hopefully I don't have to take BOTH back out!!)

Tomorrow afternoon I'll be working on her again, hopefully leak free!

PS - thanks to NiVeDh for the help/advice on the install! Next up, FMIC!
Appreciate 0
      09-06-2012, 10:50 PM   #2
zeenon53
Major
zeenon53's Avatar
13
Rep
1,064
Posts

 
Drives: BMW
Join Date: Apr 2010
Location: obx

iTrader: (3)

Sounds like you know what you need to do. Just take your time, breath, and think logically. Sometimes it can be frustrating, but the end will justify the means.
__________________
Appreciate 0
      09-06-2012, 11:17 PM   #3
FirstBMWLA
Captain
FirstBMWLA's Avatar
11
Rep
777
Posts

 
Drives: 2007 335i Coupe
Join Date: Oct 2007
Location: Tucson,AZ

iTrader: (10)

You have to simultaneously spread the clamp and twist it around to seat it.

I believe it was the front turbo that I had a skinny arm friend actually help twist it into place from above the car.

They were a nightmare though.

Good luck.
Appreciate 0
      09-07-2012, 07:00 AM   #4
redefined
Private First Class
redefined's Avatar
1
Rep
124
Posts

 
Drives: 07 335i & 2002 325i
Join Date: Jun 2012
Location: ATL

iTrader: (1)

Send a message via AIM to redefined
But do you think I have to unbolt this one from the midsection?
Appreciate 0
      09-07-2012, 08:16 AM   #5
JamesM3M5
Some dude
United_States
24
Rep
1,760
Posts

 
Drives: E28 M5, E92 335i
Join Date: Sep 2011
Location: Northern VA

iTrader: (0)

At least loosen the DP to midpipe connection. Get the V-bands close to tight, make sure the DP flanges are aligned with the midpipe, and then tighten the V-band clamps, then the midpipe bolts/nuts. It's hard to do on your back, just take your time and rest your arms and fingers if needed.
__________________
RRT Racing
E92 335i/6MT Dinan Stage 3: intercooler, oil cooler, intake, flash, exhaust, LW dual-mass flywheel.
Vishnu PWM methanol custom trunk mount, Diffsonline 3-clutch Salisbury custom diff, Ohlins Road and Track coilovers, Vorshlag camber plates, much more...
E28 M5 w/ buncha stuff, R171 SLK350
Appreciate 0
      09-07-2012, 11:58 AM   #6
redefined
Private First Class
redefined's Avatar
1
Rep
124
Posts

 
Drives: 07 335i & 2002 325i
Join Date: Jun 2012
Location: ATL

iTrader: (1)

Send a message via AIM to redefined
So i've taken the bolt all the way out and tried to move the vband around but I can only get 1 side of the vband to release. The other is stuck. Here is a picture of how far the bolt will screw in, it's tight in this picture. It's the one on the left, the one on the right seems to be good.

Attached Images
 
Appreciate 0
      09-07-2012, 12:48 PM   #7
Tiago@VRSF
BimmerPost Supporting Vendor
Tiago@VRSF's Avatar
United_States
108
Rep
7,561
Posts


 
Drives: E92 335i, F30 328i, F82 M4
Join Date: Dec 2007
Location: Hudson, MA

iTrader: (95)

Garage List
Send a message via AIM to Tiago@VRSF
Stick a screw driver into one end and hit the other with a hard object to release it

The front pipe looks great, that rear one is definitely still too far. I'd remove the bolt completely when trying to adjust them. Once you have a good seat, a good squeeze will keep the clamps in place. They should be less than an inch away from each other when squeezing by hand if they are correctly seated.

I'd also be very wary of what bolts you use (looks like you're using a non-oem bolt) on the clamps. I just spent 2 hours under a customers car where the bolt seized in the clamp and it took forever to remove due to the unreachable position.

Hit me up if you need any help
Appreciate 0
      09-07-2012, 12:57 PM   #8
redefined
Private First Class
redefined's Avatar
1
Rep
124
Posts

 
Drives: 07 335i & 2002 325i
Join Date: Jun 2012
Location: ATL

iTrader: (1)

Send a message via AIM to redefined
Quote:
Originally Posted by Tiago@VRSF View Post
Stick a screw driver into one end and hit the other with a hard object to release it

The front pipe looks great, that rear one is definitely still too far. I'd remove the bolt completely when trying to adjust them. Once you have a good seat, a good squeeze will keep the clamps in place. They should be less than an inch away from each other when squeezing by hand if they are correctly seated.

I'd also be very wary of what bolts you use (looks like you're using a non-oem bolt) on the clamps. I just spent 2 hours under a customers car where the bolt seized in the clamp and it took forever to remove due to the unreachable position.

Hit me up if you need any help
I'll try, I tried to use a prybar but couldn't get a good angle. For sure am using stock bolts. The bottom one has the stock one it in, the top one doesn't for the moment since the stock wouldn't reach to pull them together. 100% will use stock bolts for the final one though.

Tiago, think I should be able to get that one to seat without having to remove the bolts from the midsection?
Appreciate 0
      09-07-2012, 01:02 PM   #9
Tiago@VRSF
BimmerPost Supporting Vendor
Tiago@VRSF's Avatar
United_States
108
Rep
7,561
Posts


 
Drives: E92 335i, F30 328i, F82 M4
Join Date: Dec 2007
Location: Hudson, MA

iTrader: (95)

Garage List
Send a message via AIM to Tiago@VRSF
I don't think you will but it honestly can't hurt to loosen them up a bit. I'd focus more on getting that clamp fully unseated before loosening the rear bolts.
Appreciate 0
      09-07-2012, 02:07 PM   #10
redefined
Private First Class
redefined's Avatar
1
Rep
124
Posts

 
Drives: 07 335i & 2002 325i
Join Date: Jun 2012
Location: ATL

iTrader: (1)

Send a message via AIM to redefined
UGH

I just took the bolt all the way out and was able to get the vband free. So i rotated it around and back, wiggled it, took it so it was off the turbo and back on... same thing. Can only get it tight to about 1". No matter how hard I squeeze (not much room) I can't get it tight enough to put the stock bolt in without first tightening it with a longer bolt.
Appreciate 0
      09-07-2012, 02:48 PM   #11
Jeff@TopGearSolutions
BimmerPost Supporting Vendor
Jeff@TopGearSolutions's Avatar
United_States
243
Rep
18,312
Posts


 
Drives: C6 Z06, GSXR-750, 09 335i
Join Date: Dec 2008
Location: TopGearSolutions.com

iTrader: (32)

Send a message via AIM to Jeff@TopGearSolutions
Loosen up the mid section. Make sure you tweak the downpipes the correct direction and allow for clearance on the sub frame.

Also make sure when you install that v band clamp that is allows for clearance from the wastegate actuator.

Try some wd-40 to get the v band clamp to move a bit. It will probably smoke a little on start up but will go away.

Not sure what else to recommend without just being there. IF the V band is not as tight as the front turbo you will definitely leak.
Appreciate 0
      09-07-2012, 02:53 PM   #12
cn555ic
BimmerPost Supporting Vendor
cn555ic's Avatar
United_States
246
Rep
18,287
Posts


 
Drives: Bimmerscoding.com
Join Date: Jun 2007
Location: New York

iTrader: (5)

Send a message via Yahoo to cn555ic
That clamp also behave me such a hard time. Go into the car head first to get better leverage as you can use you right arm to spread the v clamp open. Going in head first you get a horrible angle at it and left hand is not as strong as right hand
__________________
917-939-4980 CODING E and F Series New York Area

Appreciate 0
      09-07-2012, 06:26 PM   #13
jb's335
Big Boost Addict
United_States
20
Rep
683
Posts

 
Drives: AW e92 335
Join Date: Aug 2008
Location: Lima, OH

iTrader: (12)

I have done a few downpipe installs now. Sometimes, especially when you are on the lift and holding up your arms for so long, I just have to close my eyes and not even look where I am working. Just take a deep breath and stay calm, things will go together you just can't get frustrated. Its the most frustrating part of modding...not getting angry!
Appreciate 0
      09-07-2012, 07:05 PM   #14
redefined
Private First Class
redefined's Avatar
1
Rep
124
Posts

 
Drives: 07 335i & 2002 325i
Join Date: Jun 2012
Location: ATL

iTrader: (1)

Send a message via AIM to redefined
WAHOOO got it. So the bottom of the bracket is where it wasn't sealing. As you know you can't really reach that part. I took the vband off the dp a few times and finally while wiggling the dp and the band it popped on... finally! I was so excited that I tightened it up and started the car.... HUGE LEAK...forgot to re-tighten the midsection bolts...hahahahha.

All is well now! How frustrating. Time for a drink.
Appreciate 0
      09-07-2012, 08:53 PM   #15
jb's335
Big Boost Addict
United_States
20
Rep
683
Posts

 
Drives: AW e92 335
Join Date: Aug 2008
Location: Lima, OH

iTrader: (12)

Congrats! Gotta love that well-deserved beer/liquor drink...
Appreciate 0
      09-07-2012, 09:41 PM   #16
Tiago@VRSF
BimmerPost Supporting Vendor
Tiago@VRSF's Avatar
United_States
108
Rep
7,561
Posts


 
Drives: E92 335i, F30 328i, F82 M4
Join Date: Dec 2007
Location: Hudson, MA

iTrader: (95)

Garage List
Send a message via AIM to Tiago@VRSF
Quote:
Originally Posted by redefined View Post
WAHOOO got it. So the bottom of the bracket is where it wasn't sealing. As you know you can't really reach that part. I took the vband off the dp a few times and finally while wiggling the dp and the band it popped on... finally! I was so excited that I tightened it up and started the car.... HUGE LEAK...forgot to re-tighten the midsection bolts...hahahahha.

All is well now! How frustrating. Time for a drink.
Been there man, glad you got em on!

All that hard work will pay off once you rev it out a bit the first time
Appreciate 0
      09-08-2012, 12:44 AM   #17
NiVeDh
Major General
NiVeDh's Avatar
United_States
158
Rep
8,014
Posts

 
Drives: '08 E90 335i, '99 E36 M3
Join Date: Apr 2009
Location: Houston, TX & Atlanta, GA

iTrader: (132)

Garage List
Good work! Glad you got it resolved. Now on to the next mod!
Appreciate 0
      09-08-2012, 11:09 AM   #18
redefined
Private First Class
redefined's Avatar
1
Rep
124
Posts

 
Drives: 07 335i & 2002 325i
Join Date: Jun 2012
Location: ATL

iTrader: (1)

Send a message via AIM to redefined
Quote:
Originally Posted by NiVeDh View Post
Good work! Glad you got it resolved. Now on to the next mod!
Up for ER FMIC install?
Appreciate 0
      09-30-2012, 03:28 PM   #19
ericruiz911
Captain
ericruiz911's Avatar
United_States
15
Rep
674
Posts

 
Drives: 2014 Chevy Silverado
Join Date: May 2012
Location: MIAMI, FL

iTrader: (1)

just ran into this problem. im gonna get under the car now to try and fix it.
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 04:39 AM.




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