Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Recommended Posts

    You can remove these ads by becoming a Contributing Member.

Thanks for the reply - 

 

Front Cats.  I took it to the dealer to get them to diag.  Its amazing it take that long to replace these - 10 hrs is a long time.  BTW, Its an 04S with 72k.  

Link to post
Share on other sites

I am curious about this also. I am considering putting larger primary cats in, and leistung on there website states that the porsche book time is 120 minutes per side. Does it require dropping the engine? Is this something that could be taken on as a DIY with special tools.

Link to post
Share on other sites

2 hours per side sounds realistic.  Per the dealer it does not require dropping the engine.  I'd love to see a diy on this as well to see what's involved.  From what I can tell, you need to unbolt both ends and remove the o2 sensor and then reinstall.  10 hour seems like a very long time for this.

Link to post
Share on other sites

Many thanks Loren for jumping in here.  Can you post the workshop instructions or tell me where to find them in the manuals.  

 

I'm sure many of the member here will be replacing their cats at some point so a DIY would be very helpful.  

 

Thanks

Link to post
Share on other sites
  • 2 years later...

Hi Loren,

 

I am about to replace the flex pipes on 04 Cayenne-S that needs to remove the Cat; however, it seems impossible to reach nor even seeing the bolts that connects from the headers. Can you please help with workshop instructions?!  Thanks in advanced!

Link to post
Share on other sites
  • 1 month later...
  • 2 months later...

Hi Loren,

 

I am about to replace the flex pipes on 05 Cayenne-S that needs to remove the Cat; however, it seems impossible to reach nor even seeing the bolts that connects from the headers. Can you please help with workshop instructions?!  Thanks in advanced!

Link to post
Share on other sites
  • 3 weeks later...

Hi everyone, I'm new here, it's a great forum, many thanks to all who are working to make it useful. I'm interested in the same procedure but for the 04 Cayenne turbo version, is it the same or deferent way to do it. Thanks

Link to post
Share on other sites
  • 1 year later...
18 minutes ago, Martynb said:

Hello All

 

another one looking to do this procedure. My passenger side flex pipe started leaking. Any info or diy would be sooo helpful... tia

I have done my MY04 Cayenne-S replaced both sides with the aftermarket flex pipes ordered on Ebay. It is kind of impossible to DIY unless replacing with complete OEM part, since it requires professional welding that need twisting angle welding to flex pipes. I sent to a bodyshop friend in Montreal and charged me 7 hours labor.

 

Very poor design in exhaust system including to change O2 sensors. If you got chance to do the flex pipes job remember to change O2 sensors at the same time. Hope it helps; good luck!

Link to post
Share on other sites
  • 10 months later...

Hello, I too am faced with most likely replacing my catalytic converters on my 08 GTS with 128K miles. I have P0421 and P0431 codes. I already replaced all 4 O2 sensors, but the codes came back. So far, I've replaced thermostat, thermostat housing and updated the coolant lower pipe in the process as well. I've searched and ran out of other options on how to get rid of these codes. I'd appreciate any other suggestions or expertise anyone may have on this matter. If you could share some workshop instructions on performing this task, thank you.

Link to post
Share on other sites
  • 3 months later...

Hi All/Loren,

 

Anyone with some DYI information on this would be greatly appreciated. Just bought an after market set up to for the pass side of my 2009 Cayenne S (124K miles).  It is leaking pretty bad from the flex pipe.  Please send info or reply here.  mbrink44@yahoo.com

 

This is the aftermarket one. $344 shipped.   I have already received it.   https://www.carid.com/dec/exhaust-pipe-mpn-po2625p.html?singleid=140268005?utm_source=email&utm_medium=order&utm_campaign=order_notification_mail

 

Thanks

Mark

Link to post
Share on other sites
  • 1 month later...
  • 1 month later...
  • 4 weeks later...

Hi,

 

I have a 2008 Cayenne GTS.  Nice size rip/hole at end of flex pipe on passenger side.  Been doing research into what to do next.  I noted a few people ask for DIY instructions and also noted one of the Admins...Loren potentially being able to supply that?

 

So I also would appreciate if you have any helpful hints, instructions.

 

I will be taking it to my local muffler shop to see if can cut out section and reweld without having to remove entire cat pipe.  Will keep updates.

 

Thank you

Link to post
Share on other sites

OMGOMGOMG.  My flex pipes were totally gone.. I had massive leaks on both sides.  Had read through all options and went to my local guy.  Cut off flex pipes and secondary cats.  2.5 inch stainless steel pipes with small flex pipe.  Completely different beast.  Price for parts and what dealer would charge is incomparable inked u can burn money without worry.  

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.