Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > S40 / V40 '96-'04 General

Notices

S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004.

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

Warping front discs

Views : 607

Replies : 3

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Aug 31st, 2021, 14:06   #1
Bobbby3000
New Member
 

Last Online: Aug 31st, 2021 14:07
Join Date: Sep 2016
Location: Enfield
Default Warping front discs

Hi I have a 2003 s40 that keeps warping the front discs. Last time I changed them I fitted new calipers but they are starting to warping again. Any idea what can be causing this. Thanks Bob
Bobbby3000 is offline   Reply With Quote
Old Aug 31st, 2021, 15:59   #2
volvo again
Master Member
 

Last Online: Today 15:37
Join Date: Jun 2018
Location: Presteigne, mid Wales
Default

Are you sure it's the discs warping, have you checked runout with a dial gauge?
What are the symptoms, usually it's the brake pedal pulsing but there could be many other problems...disc mating suface not cleaned properly, stuck guide pins, worn balljoint(s) etc etc
__________________
1998 V70 2.5 Auto & Supercharged Mercedes C Class...
volvo again is offline   Reply With Quote
Old Aug 31st, 2021, 16:01   #3
Kev0607
Premier Member
 

Last Online: Today 21:31
Join Date: Apr 2019
Location: Manchester
Default

Quote:
Originally Posted by Bobbby3000 View Post
Hi I have a 2003 s40 that keeps warping the front discs. Last time I changed them I fitted new calipers but they are starting to warping again. Any idea what can be causing this. Thanks Bob
Are you using genuine discs & pads? Aftermarket ones don’t last.

Heavy braking can warp discs.

Keeping your foot on the brake pedal whilst at lights doesn’t allow the heat to dissipate, which can warp discs. Putting the car in neutral & taking your foot off the pedal or using the handbrake with your foot off the pedal will allow the heat to escape.
__________________
2007 (P3) Volvo S80 SE 2.4D (163bhp) - 109,000 miles. Black exterior with cream leather interior.
Kev0607 is offline   Reply With Quote
Old Sep 1st, 2021, 20:41   #4
capt jack
VOC Member
 

Last Online: Today 21:39
Join Date: Jun 2006
Location: Selby, North Yorkshire
Default

What are the symptoms exactly?

If the discs are warped this can be caused by your braking style, as has been mentioned, but it can also occur if the hub mating surface isn't spotlessly clean and free from any dirt or rust when you mount new discs. Cheap non-branded pads can cause problems too.

But there are other causes of vibration during braking. If the callipers are sticking a bit and not completely free then you'll get some vibration. Also if there's any brake debris preventing the pads from moving freely. Or if a calliper or carrier is loose at all.

Another thing to check is that the calliper slide pins are completely free to move, and well greased with an appropriate lubricant. If not this will cause uneven pad pressure and hence vibration.

Wear in the suspension and steering can do it too, as can tyre problems.

Lastly, are you fitting decent branded new discs? On stuff like this the motto "buy cheap, buy twice" was never truer!

Jack
capt jack is online now   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 Off

Forum Jump


All times are GMT +1. The time now is 21:46.


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.