Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Mack on 18 March 2010, 07:34:25

Title: Brakes Question....
Post by: Mack on 18 March 2010, 07:34:25

Hi All,

I seem to have a vibration under light braking, nothing dramatic, just a slight shudder through the car. Seems to disappear when braking hard and brakes work fine as ever. All the wheels are balanced, alignment OK etc, only happens under braking. Pads and disks are OK (in terms of wear, anyway). Any ideas?

Title: Re: Brakes Question....
Post by: The Red Baron on 18 March 2010, 07:42:54

warped disc maybe, thought you would feel it worse when braking harder though.

Title: Re: Brakes Question....
Post by: Entwood on 18 March 2010, 09:37:39

You may have a an uneven buildup of material on the disc, or you may have overheated a "spot" on the disc .. actual "warping" of discs is extremely rare..

have a read here ..

http://www.powerbrake.co.za/downloads/tech_01_judder.pdf

it "may" be possible to recover the disc by following this ..

http://www.powerbrake.co.za/tech_info/tech_02_bedin.htm

(last paragraph explains why)

HTH

Title: Re: Brakes Question....
Post by: gstylebaby on 18 March 2010, 10:08:40

Quote

You may have a an uneven buildup of material on the disc, or you may have overheated a "spot" on the disc .. actual "warping" of discs is extremely rare..

have a read here ..

http://www.powerbrake.co.za/downloads/tech_01_judder.pdf

it "may" be possible to recover the disc by following this ..

http://www.powerbrake.co.za/tech_info/tech_02_bedin.htm

(last paragraph explains why)

HTH

Just printed all that off looks like a good read at dinner seeing as i'm at work at the moment.  :y

Title: Re: Brakes Question....
Post by: 2woody on 18 March 2010, 10:11:03

you may have some issues with the caliper sliders, try removing, greasing and re-fitting.

it is possible to measure the disc to see if it is warped.

Unfortunately, I've found the brakes in general, and front disc setup in particular to be very unreliable, but then again most of my cars see track use. I rarely get more than 300 miles out of front discs before they warp under these circumstances. Mind you, this isn't that much of a drama because they are cheap to replace.

the major cause of vibration on these cars is, i have come to believe, poor ageing of the caliper sliders, combined with a short brake lever radius, allowing vibrations to build up around the front strut axis. Once a vibration is started, it's very difficult to get rid of without renewing the discs.

stick only to "Ate" brand (Continental-Teves) for the discs.

Title: Re: Brakes Question....
Post by: Mack on 19 March 2010, 12:45:21

Thanks all, much appreciated as always. :)