Jump to content

Server Lease Renewal/Software Licenses - Goal Reached!

A big Thank You to all those that donated to help us reach our 2019 goal (and pay the site operating costs)!

Just an FYI - if all members of this site had donated - then the cost per member would have been less than $0.06 each.

Thanks again to all of you that did contribute!

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



I recently purchased a 2013 cayenne GTS and noticed a coolant smell in the engine bay.


This is my first Porsche and I have been driving BMWs for years.


I work on all my cars and on the BMWs most of the cooling system needs to be replaced every 80k miles.


Is that the case for our Cayennes?


Basically what is due and when for preventative maintenance specific to the cooling system?







Share this post

Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

Coolant can be tested to see it's viability to provide cooling. I would not change it unless is has become contaminated or does not test to minimum standards (for it's coolant type).

Share this post

Link to post
Share on other sites

As Loren said, I wouldn't be looking to change the coolant necessarily. I would, however, be actively looking for the source of the leak. There are multiple possibilities of which some are the water pump, the thermostat housing with the glued in pipes, glued connection at the rear of the engine, etc. All of these can drip onto a warm engine and lead to the telltale odor.

Share this post

Link to post
Share on other sites

I'm sure you already know this but some leaks won't show up until things reach operating temps. This is especially the case if it's any of the glued joints so you may want to retest if the cold test comes up blank.

Share this post

Link to post
Share on other sites

Interesting, I didn’t know this about Cayennes. On BMWs I have always found the leaks when the car is cold.

The pressure tester has been hooked up all day however it is still at 15 psi no drop in pressure and no leaks identified yet....

Share this post

Link to post
Share on other sites

I am leaving the pressure tester on overnight however it is still at 15 psi.


If by morning no change I will probably just replace the pipes under the intake with the updated part revisions and possibly the thermostat housing.


I notice the coolant smell where the upper radiator hose is located when the engine is hot.


Or i might try to perform the pressure test when the engine is hot.


My coolant level is normal so I guess it must be a very small leak or it was possibly overfilled...


Share this post

Link to post
Share on other sites

I just took the pressure tester off after several days of testing and no drop in pressure.


I believe I have found the leak to be the upper radiator hose. I took off the plastic panels to get a better look and I found what appears to be a dried coolant trail.


I plan on replacing the upper and lower radiator hoses and then drive the car to see if the issue has been resolved.


Thank you for the help.


Off topic: is there a general forum section porsche owners hang out on?

Share this post

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.

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.