S38B36 catalyst melt - BMW M5 Forum and M6 Forums
E34 M5 Discussion 1988-1995 Sedan and Touring

 5Likes
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 25 Old 27th November 2016, 05:00 PM Thread Starter
Eero H
m5board.comoholic (>1000 posts)
 
Eero H's Avatar
 
Join Date: Oct 2013
Location: Finland
Posts: 1,864
Thanks: 37
Thanked 174 Times in 161 Posts
S38B36 catalyst melt

3.6 has two cats and both contain 3 ceramic cell. Because they are ~25years old, i've seen quite many 3.6 cats that drop black bits when upside down and tapped gently.

I crafted holes and took first cells out, both were destroyed. Second and last cell are ok. I will weld lids back, i think it will pass annual emission test with two working cells.





Car was fully working and passed emission test every year. I hope this do not make more noise, but lets see...
Eero H is offline  
Sponsored Links
Advertisement
 
post #2 of 25 Old 13th March 2017, 01:50 PM Thread Starter
Eero H
m5board.comoholic (>1000 posts)
 
Eero H's Avatar
 
Join Date: Oct 2013
Location: Finland
Posts: 1,864
Thanks: 37
Thanked 174 Times in 161 Posts
Eero H is offline  
post #3 of 25 Old 13th March 2017, 08:27 PM
Nikosx
Member, P500 Sport, DSC On (>700)
 
Nikosx's Avatar
 
Join Date: Aug 2006
Location: Scottsdale, Arizona
Posts: 715
Thanks: 1
Thanked 31 Times in 24 Posts
Nikosx is offline  
 
post #4 of 25 Old 13th March 2017, 11:48 PM
6stang9
Member, Sport: On DSC: Off
 
6stang9's Avatar
 
Join Date: Jul 2013
Location: W-S, NC, USA
Posts: 271
Thanks: 17
Thanked 14 Times in 12 Posts
Great, something else to worry about....thanks a lot.

Now, I am thinking: since my car is over 25 years old, it does not need emissions testing... at least here in North Carolina.

Home of the Silver Bimmers: '99 E36, '98 E36, '91 M5, '84 Euro E24
6stang9 is offline  
post #5 of 25 Old 14th March 2017, 06:28 AM Thread Starter
Eero H
m5board.comoholic (>1000 posts)
 
Eero H's Avatar
 
Join Date: Oct 2013
Location: Finland
Posts: 1,864
Thanks: 37
Thanked 174 Times in 161 Posts
Quote:
Originally Posted by Nikosx View Post
Is the car any louder?

Sent from my iPhone using Tapatalk
Very little metallic sound when pulled on full throttle. Idle or cruising i cant notice.

Quote:
Originally Posted by 6stang9 View Post

Now, I am thinking: since my car is over 25 years old, it does not need emissions testing... at least here in North Carolina.
Straight pipes are way to go then?
Eero H is offline  
post #6 of 25 Old 14th March 2017, 03:14 PM
GregT53
Fellow Member (>400)
 
GregT53's Avatar
 
Join Date: Nov 2011
Location: Charlottesville, Virginia USA
Posts: 401
Thanks: 15
Thanked 45 Times in 35 Posts
GregT53 is offline  
post #7 of 25 Old 14th March 2017, 04:57 PM Thread Starter
Eero H
m5board.comoholic (>1000 posts)
 
Eero H's Avatar
 
Join Date: Oct 2013
Location: Finland
Posts: 1,864
Thanks: 37
Thanked 174 Times in 161 Posts
Quote:
Originally Posted by GregT53 View Post
Going to straight pipes won't negatively affect back pressure and performance?
I had straight pipes, i feel it had less low rpm torq. I have seen some E28 M5 dyno numbers and shows straight pipes give little more hp on high rpm and less torq on low rpm.

OEM silencer is same size than cats, same power/torq numbers on factory brochures.

But why not just fix cats?



.

Last edited by Eero H; 14th March 2017 at 05:02 PM.
Eero H is offline  
post #8 of 25 Old 18th March 2017, 12:15 AM
6stang9
Member, Sport: On DSC: Off
 
6stang9's Avatar
 
Join Date: Jul 2013
Location: W-S, NC, USA
Posts: 271
Thanks: 17
Thanked 14 Times in 12 Posts
Quote:
Originally Posted by Eero H View Post
...
But why not just fix cats?


.
You mean like you did? I can't, (I don't have time/skill) and I don't think I could find a shop that would touch a catalytic converter. Not okay to "mess" with emissions stuff, even if exempt from testing. But they could remove them.

If anything, yes, I would just delete the cats. :0

Home of the Silver Bimmers: '99 E36, '98 E36, '91 M5, '84 Euro E24
6stang9 is offline  
post #9 of 25 Old 18th March 2017, 12:55 AM
inertia8
Addicted Member (>300 posts)
 
Join Date: Jun 2008
Location: Melbourne, Australia
Posts: 325
Thanks: 5
Thanked 12 Times in 9 Posts
If in that situation, I'd just fit aftermarket metal cats with a lower cells per inch count, 100cpi or 200cpi.
inertia8 is offline  
post #10 of 25 Old 18th March 2017, 07:43 AM Thread Starter
Eero H
m5board.comoholic (>1000 posts)
 
Eero H's Avatar
 
Join Date: Oct 2013
Location: Finland
Posts: 1,864
Thanks: 37
Thanked 174 Times in 161 Posts
Quote:
Originally Posted by 6stang9 View Post
You mean like you did?
That or install new cell inside. Removing cats are bad for enviroment you know.

Quote:
Originally Posted by inertia8 View Post
If in that situation, I'd just fit aftermarket metal cats with a lower cells per inch count, 100cpi or 200cpi.
That is one solution, problem is that it will look non original.



.

Last edited by Eero H; 18th March 2017 at 07:44 AM.
Eero H is offline  
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW M5 Forum and M6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Similar Threads
Thread Thread Starter Forum Replies Last Post
Proof that exotics won't melt! Dr.Know GTBoard.com: General Sportscars 8 29th January 2007 08:44 AM
Can CATALYST Sensor cause..... m5 rus E39 M5 and E52 Z8 Discussion 13 9th July 2004 11:25 AM
Snow Melt + M5 = ARRRGGG!!!! 1080iAddict E39 M5 and E52 Z8 Discussion 12 5th March 2003 10:09 PM
catalyst ? E34 M5 Discussion 6 20th February 2002 11:27 AM
Catalyst... kiwistu E34 M5 Discussion 2 13th May 2001 04:56 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome