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)

Minimum rotor thickness and pad thickness before replacement?

ALEV8
 Share

Recommended Posts

ALEV8 Member

ALEV8

Posted
Posted

I'm experiencing shuddering while braking highway speeds. Just started about in June. So I bought some new front rotors. When I went to install the rotors I noticed that the current ones looked brand-new, and when I measured them with a caliper they are the same thickness almost as the brand-new rotors which have arrived from centric. Maybe it's the pads, or should I just do both and shut up?

I just can figure out why after two years I have shudder and the **** rotors are so close to new....

At a loss here.

clarksongli Member

clarksongli

Posted
Posted

check flatness and runout of the current rotors with a magnetic base and a dial indicator.

Stick the base to the spindle and set the gauge on the face of the rotor....spin the axles and see if they are relatively flat....pulsation comes from warping and transfer layer build up.

mcbit500 Member

mcbit500

Posted
Posted

I'm experiencing shuddering while braking highway speeds. Just started about in June. So I bought some new front rotors. When I went to install the rotors I noticed that the current ones looked brand-new, and when I measured them with a caliper they are the same thickness almost as the brand-new rotors which have arrived from centric. Maybe it's the pads, or should I just do both and shut up?

I just can figure out why after two years I have shudder and the **** rotors are so close to new....

At a loss here.

You may also get shudder if there is play in any of the front suspension joints.

ALEV8 Member

ALEV8

Posted
  • Author
Posted

Wheels off today checked both visually and there's barely any wear on rotor or pads. I cannot measure runout as I don't have a gauge. This shuddering came on very suddenly this summer. Makes me think it is the front lower control arms...likely will need a pro to look rather than start replacing parts wildly nilly...

clarksongli Member

clarksongli

Posted
Posted

If you feel up to it, you can unbolt the lower control arms and swing the arm out to look at the bushings...this is a typical play zone.....just try not to touch the outer spindle ball joint bolts, or you may need to get another alignment.

Basically:

1. Disable air suspension

2. Jack up front of car

3. Take tire off

4. Unbolt the front and rear lower control arm bolts.

5. let the entire assembly swing out....and take a look at the bushings for cracks/breaks

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • 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.