E90Post
 


TireRack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Heatshield and 3" Downpipes



Reply
 
Thread Tools Search this Thread
      05-19-2012, 10:10 PM   #1
triggz
Banned
Canada
21
Rep
1,225
Posts

 
Drives: E92 335i
Join Date: Jun 2010
Location: Toronto

iTrader: (2)

Heatshield and 3" Downpipes

Have any of you had issues with your aftermarket downpipes rubbing up on the heatshield?

I have been noticing this weird sound coming from the passenger side while driving. I always assumed it was wastegate rattle but I had my doubts because It sounded different than the common wastegate rattle.

I had the car lifted and noticed my AR downpipes were touching the heatshield. Obviously when driving, they must be whats causing that metal on metal sound. Theres even marks on the heatshield from the downpipes.

Have any of you removed the heatshield completely?

The noise is driving me crazy.
Appreciate 0
      05-19-2012, 10:19 PM   #2
bv1
Private First Class
1
Rep
167
Posts

 
Drives: 335i Coupe AT
Join Date: Jan 2011
Location: Toronto

iTrader: (0)

Quote:
Originally Posted by triggz
Have any of you had issues with your aftermarket downpipes rubbing up on the heatshield?

I have been noticing this weird sound coming from the passenger side while driving. I always assumed it was wastegate rattle but I had my doubts because It sounded different than the common wastegate rattle.

I had the car lifted and noticed my AR downpipes were touching the heatshield. Obviously when driving, they must be whats causing that metal on metal sound. Theres even marks on the heatshield from the downpipes.

Have any of you removed the heatshield completely?

The noise is driving me crazy.
Yep, there is only a tiny amount of room to align the pipes millimeters actually. Rotate one way hit the other pipe rotate the other way hit the heat shield of the engine mount. I had the same noise first install, I ended up removing the heat shield and flattening the part that the pipe was hitting in a vice reinstalled the heat shield.
__________________
|Cobb AP / JB4 | DCI | BMS WW Meth Kit | AMS FMIC | Macht Schnell 3" DP |
Appreciate 0
      05-19-2012, 10:24 PM   #3
triggz
Banned
Canada
21
Rep
1,225
Posts

 
Drives: E92 335i
Join Date: Jun 2010
Location: Toronto

iTrader: (2)

Is it safe to run without the heatshield? Is it a necessity to have it?
Appreciate 0
      05-19-2012, 10:31 PM   #4
bv1
Private First Class
1
Rep
167
Posts

 
Drives: 335i Coupe AT
Join Date: Jan 2011
Location: Toronto

iTrader: (0)

That I'm not sure, I was definitely tempted but figured the engineers stuck it there for a reason. My thought would be it would lead to a shorter life of the mount not having the shield in place. If you flatten the area where you see the contact scratches from the pipe you should be ok.
__________________
|Cobb AP / JB4 | DCI | BMS WW Meth Kit | AMS FMIC | Macht Schnell 3" DP |
Appreciate 0
      05-20-2012, 12:06 AM   #5
imageautodetail
Captain
imageautodetail's Avatar
10
Rep
800
Posts

 
Drives: 08 335 silverback
Join Date: Nov 2010
Location: lou EVIL kentucky

iTrader: (12)

Garage List
2008 335 e90  [0.00]
2007 e90 335  [2.50]
no cats... no heat sheild...
__________________
FBO...METH...BIG TWINS
Appreciate 0
      05-20-2012, 10:27 AM   #6
GeorgiaTech335coupe
Lieutenant Colonel
26
Rep
1,884
Posts

 
Drives: Black BMW 335i coupe
Join Date: Mar 2007
Location: USA

iTrader: (0)

I just had this problem. We used a crowbar to push the heat shield away as much as possible. No more sound now.
__________________
Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(e90post.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
Appreciate 0
      05-21-2012, 12:50 PM   #7
AU335i
Captain
AU335i's Avatar
17
Rep
886
Posts

 
Drives: 2008 335i E92
Join Date: Dec 2010
Location: Auburn, AL

iTrader: (3)

video of sounds?
Appreciate 0
      05-21-2012, 01:56 PM   #8
Jeff@TopGearSolutions
BimmerPost Supporting Vendor
Jeff@TopGearSolutions's Avatar
United_States
246
Rep
18,404
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
Just bend the heat shield out of the way.
Appreciate 0
      05-21-2012, 02:44 PM   #9
roadkillrob
Brigadier General
United_States
58
Rep
3,914
Posts

 
Drives: 2008 335Cic, 2011 X5 35i
Join Date: Jul 2007
Location: Boston

iTrader: (14)

I just bent mine with a big flat screwdriver when installing the catted dp's to give it a little clearance and have never had any noise from it.
__________________

2008 E93 335i, GIAC Stage 2, HPF IC, Injen Intake, Defective AR Design DP's with useless cats
2014 X3 35i JB Stage 1
Appreciate 0
      05-22-2012, 10:07 AM   #10
tibbie03
Enlisted Member
0
Rep
32
Posts

 
Drives: Black 08 335i
Join Date: May 2012
Location: Lufkin, Tx

iTrader: (0)

Good suggestions!
Appreciate 0
      06-25-2014, 09:15 PM   #11
NeedleBanger
Enlisted Member
Canada
1
Rep
46
Posts

 
Drives: '07 335i
Join Date: Feb 2014
Location: Alberta

iTrader: (0)

I have some woofers in the back and they have rattled the heat shield so bad that it corroded/bent around the big washers holding the HS in place. Now it rattles ridiculously. I might just have to get some bigger washers.
Appreciate 0
      12-21-2014, 07:48 AM   #12
NeedleBanger
Enlisted Member
Canada
1
Rep
46
Posts

 
Drives: '07 335i
Join Date: Feb 2014
Location: Alberta

iTrader: (0)

Nope, took the heat shield off completely and holy crap I don't know what I was waiting for!! Should have done that years ago.
Appreciate 0
      12-22-2014, 04:08 PM   #13
robc1976
DIYER
robc1976's Avatar
89
Rep
4,754
Posts

 
Drives: E90 335i
Join Date: Mar 2012
Location: Illinois

iTrader: (11)

Quote:
Originally Posted by triggz View Post
Is it safe to run without the heatshield? Is it a necessity to have it?
I trimmed mine when I took out my subframe
__________________
JB4 G5, WEDGE flash, 455 LPFP, HFS-4 meth kit, BMS OCC, Motiv 750 ST, RB valve, BMS DCI, 3" AR Dps, Custom OC W/ SS lines, ER FMIC, ER CP W/HKS BOV, M3 control arms, M3 guide rods, M3 upper links, M3 front & rear sway-bars, HPA rear toe arms, Wavetrac LSD, HPF Gen 2 exhaust DEFIV kit, KW clubsport, Delrin solid subframe bushings, stoptech rotors, Rogue Tranny Mounts, 1M bumper, M3 CF hood, MORR VS8.2 rims 245/295
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 02:37 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