BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > DIY Guides/ Discussions
 
European Auto Source (EAS)
Post Reply
 
Thread Tools Search this Thread
      02-28-2016, 05:55 PM   #1
Shredicus
Major
Shredicus's Avatar
528
Rep
1,122
Posts

Drives: E92 M3
Join Date: Jun 2014
Location: Spokane, WA

iTrader: (12)

Any DIY for Header/Exhaust Manifold removal?

As referenced in this post I think I've got an exhaust leak at the manifold. I was rear ended a while back and the left side muffler did get whacked pretty good. I think its possible a nut has come lose or a gasket degraded, although not a common issue.

My question is does any DIY exist for accessing the passenger side exhaust manifold? I believe it will be a bit easier than driver side due to the lack of power steering equipment in the way. Is it possible to swap a gasket or two without fully removing the headers from the vehicle?

update: At this point I've swapped an OEM header, new exhaust gaskets, and now a set of aftermarket headers and the tick persists. I dont think it's exhaust related

Last edited by Shredicus; 04-15-2022 at 01:56 AM..
Appreciate 0
      03-01-2016, 06:11 AM   #2
rcracin
Major
1238
Rep
1,285
Posts

Drives: M3
Join Date: Jul 2012
Location: NYC

iTrader: (3)

I had a similar situation with a leak at the head. It mostly likely is a bent flange so you'd have to pull the header off and bang it straight or just replace it. It's quite a task pulling the headers but it's doable. You gotta support the engine from the top and lower the subframe. It's a bitch to do but it's possible.

The header flanges are really thin. Really really thin so it will most likely be bent. You get a tapping sound that is especially pronounced during the cold start?

Best way to confirm like I did is to stick a smoke machine into the header collector. I tried from the exhaust but it was too far a distance to travel and didnt produce results.
Appreciate 1
      03-11-2016, 03:32 PM   #3
Shredicus
Major
Shredicus's Avatar
528
Rep
1,122
Posts

Drives: E92 M3
Join Date: Jun 2014
Location: Spokane, WA

iTrader: (12)

Quote:
Originally Posted by rcracin View Post
I had a similar situation with a leak at the head. It mostly likely is a bent flange so you'd have to pull the header off and bang it straight or just replace it. It's quite a task pulling the headers but it's doable. You gotta support the engine from the top and lower the subframe. It's a bitch to do but it's possible.

The header flanges are really thin. Really really thin so it will most likely be bent. You get a tapping sound that is especially pronounced during the cold start?

Best way to confirm like I did is to stick a smoke machine into the header collector. I tried from the exhaust but it was too far a distance to travel and didnt produce results.
Well couldnt get any smoke to come out at the manifolds, but the guy said for $40 he wasnt undoing any bolts, just running it up the tailpipe. No one seems to be at all able to figure out the origin of the sound; 3 different mechanics using stethoscopes. Everyone's hunch though seems to be manifolds since it comes from lower on the block and there is no abnormal bottom end/valvetrain noise, as well as the nature of the sound being a softer hiss than a click or knock. I've also got a lean bias on bank 1 o2 sensors

Might be convenient to swap the passenger side header when I do my motor mounts as those also require the frame to be dropped a bit. Will it need to fully come down(like rod bearings) to remove/replace the manifold or can I just drop it a few inches like in the motor mount DIY?

The video I posted in the link above is of the noise. I cant really say whether its more pronounced when cold or hot; stays pretty constant

Last edited by Shredicus; 03-11-2016 at 03:38 PM..
Appreciate 0
      11-17-2020, 06:39 AM   #4
JEREM3Y
Registered
New Zealand
3
Rep
2
Posts

Drives: E92 M3
Join Date: Oct 2020
Location: New Zealand

iTrader: (0)

Did you ever find out what caused this? And how to fix?
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 01:23 PM.




m3post
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