Jump to content

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)

Popping/cracking sound, left rear


Recommended Posts

2000 986 Tiptronic, nearly 99k miles.  I am getting an annoying popping/cracking sound coming from the left rear.  While driving it sounds like it is high in the suspension, possibly related to the shock absorber, shock absorber mount, or spring.  I only hear the noise at low speeds - going over speed bumps or backing out of my driveway in the morning.  I know it is difficult to pinpoint what the issue could be by just my description, so I am hoping that someone else has heard this noise and it is obvious to someone who has experienced it before.  It could be as simple as a bad shock/strut, but I've never had one go out so I don't know what it sounds/feels like.  The car seems to respond correctly to the push test (push down and it reflexes back to height).  I also checked the nut at the top of the tower which I saw on several posts could be loose, but it was completely tight.  Sway bar, bushings, mounts, all appear to be good.  I took several videos hoping that it might help identify where this is coming from.  I can replicate the sound by jacking up the rear end and then lowering.  You can actually hear popping on the way up too, but it is very noticeable on the way down.  Please let me know what you think could be the culprit!

 

Lowering the back end:

http://vid779.photobucket.com/albums/yy73/crwarren11/Porsche/IMG_4889x.mp4

 

Lowering the back end, view2:

http://vid779.photobucket.com/albums/yy73/crwarren11/Porsche/IMG_4895x.mp4

 

Jacking up the back end and lowering (notice clicks/pops on the way up):

http://vid779.photobucket.com/albums/yy73/crwarren11/Porsche/IMG_4894x.mp4

 

From inside the car, going over a speed bump (sounds more like a squeaking/cracking at 4 seconds):

http://vid779.photobucket.com/albums/yy73/crwarren11/Porsche/9BCBAE06-7C41-4BB3-A592-EAD3997C58F4.mp4

Link to comment
Share on other sites

  • 4 months later...

I finally got some work in on this and replaced the rear control arms aka control arm link / track arm (986-331-043-07).  Solved the popping/cracking issues and resolved a lot of the other vibrations and rattling.  I have not seen other posts that talk about these symptoms being caused by the control arms, so just wanted to pass along.

 

Link to comment
Share on other sites

  • 3 months later...

I think just the bushings can be replaced but would likely require a hydraulic press so I just replaced the entire arms on both sides. Very easy job. Also check the tightness on your assymmetric bolts for the alignment settings to make sure they aren't loose.

Link to comment
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.