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)
gojerry

Knocking on front end after 30 mins driving

Recommended Posts

 I have  an 03 Boxster with 95k on the clock.

When you first start driving the car, everything is tight and quiet. After about 25 - 30 miles, the front start to knock lightly and rumble. Most noticeable between 0 and 30mph in queuing traffic.  You can feel the knocks on the steering wheel and brake pedal. The further you go the worse it gets. The sound is like a bolt being jarred in a plastic bottle.

Up to now it has had new bake disks and pads. Track rod ends and wishbones replaced and something That looks like coffin struts changed. Wheels and tyres have been checked. When the knocking started, the brake warning light came on. The front sensors have been changed so the warning lights don't come on when the knocking starts.

I am not mechanically minded but In my mind its a brake problem as the issue only shows up after driving for about 30 miles and things are starting to warm up.

The garage cannot identify the issue and have run out of ideas. Can anyone suggest or identify the problem as I have been replacing bits without success

Share this post


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

Remember that, just like the brakes, the shock absorbers also warming up by the friction on the in and out movements. The fact that the wheel sensors are replaced remind me of weak shock absorbers, the sensors go thereto defect. 

Share this post


Link to post
Share on other sites

Hi guys. Can you tell me if replacing the shock absorbers cured this problem please?  I have the very same issue which I am trying to resolve. 
Cheers,

Terry

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.

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.


  • Similar Content

    • By Paul Hasbany
      Hi there! 1st off, thank you for reading this! 2nd, is there a way to add a little more HP? 
       
      Thx all!

    • By Jrfishel1
      I have a 2003 Boxster base model (2.7) with auto. Current showing code P0600 and DTE 61. Had a few different Porsche mechanics look at the issue and have not found a solution.  Cleaned the electrical connection at the transmission and verified the ground connections at the tiptronic control module. Had the DME, tiptronic module and immobilizer checked and they were found to be working.
       
      Does the Can-bus connection between the DME and the tiptronic module extend to the immobilizer or other modules? All I could find is information up to the 2001 model year.
       
      Looking for a reason why the DME Is not communicating with the tiptronic and how to test the Can-bus circuit.  Is there a wiring schematic available for the 2003/2004 boxster?
       
      Thanks,
       
      jason
    • By Kodai
      Hi all 986 guys.
      I will post for the first time.
      I have '98 986K(Tip-s),Can I swap 5-Speed(or 6-Speed) manual transmission?
      In other words, prepare missions, pedals, manual transmission CPUs, etc. like a typical car model (for ex, BMW).
      Is it possible to update only the mission, not the upgrade to 3.4L?
      Has anyone ever seen or heard of such a vehicle?
      I can find 986K 5speed as much as I want, but I want to stick to my one.
       
      Thank you!!

       
    • By Sea_Galley
      1999 986 2.5 Boxster. (5 spd)
       
      Not many problems with the car but cruise control doesn’t work and the spoiler only extends halfway or so.
       
      Current actual problem with the car is that I  can feel vibration or shaking in the steering wheel (and in the car to a much lesser extent) after shifting into fourth gear. After shifting into fourth gear, the shaking seems to persist even as I slow down, or after shifting into fifth. It will persist even if I shift into neutral but will stop after I come to a stop.
       
      It’s strange to me that this is the case when gears 1-3 don’t have this problem. I am guessing that it’s an issue with bearings or alignment in the front wheels since i’m feeling the vibrations in the wheel but hopefully someone here has a better idea.
×
×
  • 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.