Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

LinkBack Thread Tools Display Modes
Old 04-26-2009, 02:54 PM   #1
Registered User
Join Date: Mar 2008
Location: near Chicago
Posts: 523
Brake noise

I was at the Chicago PCA autocross school today. Last night I put in my Hawk Blues which had at least 75% of their original thickness on them.

After one of the early runs through the slalom course I heard this horrible noise. It sounded like metal on metal. I couldn't tell where it was coming from until one of the PCA worked walked over to me (from about 50 yds away) to ask if my brakes always made so much noise. After that I listened to them every time I stopped, but I didn't hear the noise again.

On the way home however, I did hear it again when I stepped on the brakes. This was much quieter though. That first time was really pretty loud. When driving home it had to be pretty quiet (low ambient noise) for me to hear it. It didn't sound like the squeal you will sometimes hear with racing pads. Instead, it sounded like somebody had replace my pads with smooth metal. It just sounded like metal to metal rubbing, but not grinding like it would sound like with pads competely gone. I also noticed that sound when I wasn't on the brakes (when I was coasting into my garage). It seemed to be coming from both sides equally.

I haven't pulled my wheels yet to switch back to street pads, but looking with the flashlight, I can see that I still have plenty of pad left.

I can understand that pads making noise when I'm stopping, but I don't think they should be dragging while I'm off the brakes.

Mike_Yi is offline   Reply With Quote
Old 04-26-2009, 03:05 PM   #2
j.fro's Avatar
Join Date: Feb 2005
Location: Virginia
Posts: 1,359
I've gotten a horrible brake/screeching noise after AX runs when the car has picked up a piece of gravel and it's become wedged between the rotor and the dust shield. Putting the car in reverse and backing up a few feet usually knocks the rock out.
j.fro is offline   Reply With Quote
Old 04-26-2009, 10:03 PM   #3
Registered User
Lil bastard's Avatar
Join Date: Feb 2008
Location: Du Monde
Posts: 2,199
Glazed discs.

Take #40 sandpaper and rough up the discs, then re-bed the street pads.

1990 Porsche 964 Carrera 4 Cabriolet
1976 BMW 2002
1990 BMW 325is
1999 Porsche Boxster
(gone, but not forgotten)

Never drive faster than your Guardian Angel can fly!
Lil bastard is offline   Reply With Quote
Old 04-27-2009, 02:54 PM   #4
Registered User
Join Date: Mar 2008
Location: near Chicago
Posts: 523
Thanks! Good to know it's something simple.

I think the loud noise was due to sand picked up.

Mike_Yi is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 03:21 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page