Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: mrgreen on 13 April 2011, 11:08:21

Title: brake disk cracked?
Post by: mrgreen on 13 April 2011, 11:08:21
can anyone tell me is this brake disk cracked it's only six months old but i suspect it may have been binding and i do get a pulsing through the wheel under braking

http://i1100.photobucket.com/albums/g417/richisells/brakes002.jpg

TIA
Title: Re: brake disk cracked?
Post by: kcl on 13 April 2011, 11:09:51
Can not see any cracks  :-/
Title: Re: brake disk cracked?
Post by: Lazydocker on 13 April 2011, 11:10:16
Doesn't look it from the photo but difficult to tell.

If you tap it gently all around does the sound change?
Title: Re: brake disk cracked?
Post by: mrgreen on 13 April 2011, 11:10:19
here's another piccy

http://i1100.photobucket.com/albums/g417/richisells/brakes003.jpg
Title: Re: brake disk cracked?
Post by: tunnie on 13 April 2011, 11:11:17
i'd say no, that looks more like a burn. Do you drive an auto? Under 'spirited' driving, if you come to a halt in an auto and leave your foot on the brake, the heat can do damage to the disc.

Is it at certain speeds, or all speeds?
Title: Re: brake disk cracked?
Post by: mrgreen on 13 April 2011, 11:13:24
yes it's an auto but i'm usually careful to drop out of gear when sat still and it only pulses at low speeds before i changed them they were warped and at motorway speeds you knew they were warped!
Title: Re: brake disk cracked?
Post by: kcl on 13 April 2011, 11:14:18
Still no crakcs, only marks of heat, e.g. foot on brake for a good while when the disks have been hot  :-/

edit: must type faster...  :-X
Title: Re: brake disk cracked?
Post by: Andy B on 13 April 2011, 11:15:37
Quote
.... before i changed them they were warped and  ....

What discs did you use, pattern or OE?  :-/
Title: Re: brake disk cracked?
Post by: mrgreen on 13 April 2011, 11:17:32
i used brembo, so i geuss pattern but i thought brembo were a quality product they vertainly weren't as cheap as some of the others i looked at :o
Title: Re: brake disk cracked?
Post by: mantahatch on 13 April 2011, 13:08:46
Having suffered warped discs myself I have now returned to using the handbrake virtually all the time I am stationary.

Unless I am trying to blind the idiot behind me of course  ;D
Title: Re: brake disk cracked?
Post by: Boracic on 13 April 2011, 14:43:14
I have the same on my vented rears, I changed them because of it with VX disks, but when I last checked they look the same again
Title: Re: brake disk cracked?
Post by: dbug on 13 April 2011, 20:03:46
Quote
here's another piccy

http://i1100.photobucket.com/albums/g417/richisells/brakes003.jpg

Mark at 12 o'clock looks like a burn - not so sure though about faint mark at approx 10 - 11 o'clock.

Title: Re: brake disk cracked?
Post by: Entwood on 13 April 2011, 20:15:27
Quote
can anyone tell me is this brake disk cracked it's only six months old but i suspect it may have been binding and i do get a pulsing through the wheel under braking

http://i1100.photobucket.com/albums/g417/richisells/brakes002.jpg

TIA

Pulsing can be caused by other than "warping" or "cracking" ... have a read here .....

http://www.powerbrake.co.za/tech_info/tech_01_judder.htm

If you find that useful, read the rest of the site... several pages of very good information on brakes

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

HTH  :)
Title: Re: brake disk cracked?
Post by: mrgreen on 13 April 2011, 23:12:52
Quote
Quote
can anyone tell me is this brake disk cracked it's only six months old but i suspect it may have been binding and i do get a pulsing through the wheel under braking

http://i1100.photobucket.com/albums/g417/richisells/brakes002.jpg

TIA

Pulsing can be caused by other than "warping" or "cracking" ... have a read here .....

http://www.powerbrake.co.za/tech_info/tech_01_judder.htm

If you find that useful, read the rest of the site... several pages of very good information on brakes

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

HTH  :)
thanks entwood that is a great site looks like i may have cooked it! i did clean the hub before fitting but it's quite possible i missed bits! anyway i'm going to try and get them skimmed as i wan't to sell the car anyway and don't want to fork out for new pads, went for the m.o.t at mazda and i mentioned it to them and they failed it and as they weren't oem parts wouldn't touch them without replacing discs and pads and they failed it on the wish bones as the rubber which covers the bolt had perished no play just perished and could let water in so i'm off to another garage when i've got the brakes sorted! and if need be will glue rubber grommets over the wish bone bolts!!