Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

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)

Weird squeek? 99 C2


Recommended Posts

Okay, I have had a weird pulsing squeek sound coming from the rear of my car for a few weeks now... unfortunately I cannot find it without the car moving, so I wanted to run the symptoms by you fine folks to see if you can help.

The sound is wheel speed dependent and coming from the rear (not sure which side but sounds like drivers), is not effected by braking or steering, goes with wheel rotation and not engine rpm (present in all gears), and goes away when under throttle. It is most noticeable when coasting or under deceleration... the minute I hit the gas it goes away. It is not always present but is about 75% of the time. I have PSS9 coilovers but have had them for many months with no issues. Any ideas on what to look for?

My troubleshooting idea on this was to lift the rear of the car and put the rear suspension on jackstands to keep it under load... then start the car (carefully of course) and see if I can hear anything with it in gear.

Anyways, the sound is driving my nuts so any help is appreciated!

David

Link to comment
Share on other sites

Sounds like brake pads or glazing on the rear rotors. I would recommend some emery paper (sand paper for metal) fine grid, and do some light hand sanding of the rear rotors, sand radially (from hub to edge). Do it softly first, spin the wheel to check, do it again. If it is glazing, a few repeat steps will remove or significantly reduce the noise. Check your pads too, make sure they are good.

Another potential is the heat shield over the rotor, which tend to bend and come in contact with the rotor. But that typically happens after a hot track day with heavy braking. If that is the case, I solve that with a long flat screwdriver, push on the shield to it is not in contact with the rotor.

Link to comment
Share on other sites

I thought about brake pads as well... but applying the brakes makes no change in sound. It is more the throttle actuation that seems to make it come and go which is weird. I was thinking some suspension bushing might be it but not sure. Even thought about the exhaust system couplings since the engine movement under load might cause it to go away under throttle like that.

What about wheel bearings? Would they behave this way if they were going bad?

David

Sounds like brake pads or glazing on the rear rotors. I would recommend some emery paper (sand paper for metal) fine grid, and do some light hand sanding of the rear rotors, sand radially (from hub to edge). Do it softly first, spin the wheel to check, do it again. If it is glazing, a few repeat steps will remove or significantly reduce the noise. Check your pads too, make sure they are good.

Another potential is the heat shield over the rotor, which tend to bend and come in contact with the rotor. But that typically happens after a hot track day with heavy braking. If that is the case, I solve that with a long flat screwdriver, push on the shield to it is not in contact with the rotor.

Link to comment
Share on other sites

  • 3 weeks later...

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.