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[2woody]

yep - discs of all types warp very easily - it's actually the calipers I think, too much play in the sliders, even on good ones.

I can't make a pair of discs last longer than about six months.

Mind you, on the two cars I've got with different caliper, no hint of warpage.

[doug4293]

when u changed the pads did u copper slip the sliders and the brake pins ? may be ur problem if they are sticking ?

[vexorg]

If they are warping due to heat then drilled discs will fail sooner, they crack around the drilled holes with heat.

As above, never had much of an issue with genuine GM discs.

[TheBoy]

I must say the discs and pads from Vauxhall on my past and present big engined cars have always taken whatever I have thrown at them, and I have never been a slow driver to say the least!!  Long journeys, with high speeds and much braking have just made the kit red hot, but it has all held together. 8-) 8-) 8-)

In my opinion, and I know I could be wrong, unless you have a 200+mph supercar you do not need anything more than the brakes the car is equiped with; the original designers have specified brakes capable of dealing with the top speed of your car (150 mph with a Vx 3.0 V6)

 

In the case of the Omega, whilst the TC pads can take a fair amount of abuse, they are most definately the first part of the system to let go - 7 or 8 80/90mph stops (as in Milton Keynes ) will cook them to the point of ineffectiveness. Push before this, and the pedal goes, so presumably fluid goes.  But the discs, they seem to live on and on, just so long as you haven't played silly buggers as above, then sit at next roundabout, waiting for a gap, with your foot hard on the brakes.


As to car designers using right parts....   ....possibly the designers do, but then the bean counters come along.  Most are, at best, adequate on many cars.  In the case of the Omega, I think (for road use), the standard brakes are well up to the job

[2woody]

pads are the first to show up problems when they can't dump the heat yu're asking them to. solutions are to :-

have "harder" pads
have bigger brakes
or drive slower.

Omega B are really quite small brakes for the size and weight of car.

[feeutfo]

when u changed the pads did u copper slip the sliders and the brake pins ? may be you are problem if they are sticking ?

Indeed, before buying or changing anything make sure the current set up is working as it should, and sticking sliders would be my first port of call tbh. Clean out under the rubber boots and grease the sliders with the correct heat resistant silicon based grease. Make sure it all works and moves freely.

To check the above push the piston in and open the bleed nipple with a simple bleed kit attached, to force the old fluid out from around the piston and draw some more fluid through with a good bleed of the system. I use 5.1 in mime as it has a higher boiling point, not because I need it generally, just to give a better tolerance if I get brave as it has a higher boiling point.

I would start with that first and see how it goes. Having been in the car with TB on a mission, IMO you've really got to be abusing the brakes to get them to play up, instant full brake force at the latest possible moment tickling the Abs after repeated burying the nose in the floor, in my car to a lesser extent, and I can only imagine how he would drive his own, I would think opts safe to say if your killing discs at that rate, something ain't right with the system.

My personal issue with tc pads is the la k of bite and feel under normal driving conditions, but that wont affect your issues.

Suspect oe pads, to give better bite, and ebc "dimpled" and grooved discs may be a good combination, but only choosing ebc as they seem to be more rust resistant than gm discs afaict, need to confirm this somehow though  :-/
Buypartsby seem to have good prices on ebc discs last I looked. But if there is a fault or binding calliper they will go the exact same way, so check the brakes out IMO.

Hth

[TheBoy]

I can only imagine how he would drive his own

I am just like Miss Daisy

[Dave Elite]

What you doing, warping them? Or just wearing away?


TBH, I've founf the genuine GM ones pretty indestructable, though after a spanking, I also shift to neutral and put handbrake on, rather than sit on footbrake.

Well that sounds like a pretty insane thing to do.

[hotel21]

What you doing, warping them? Or just wearing away?


TBH, I've founf the genuine GM ones pretty indestructable, though after a spanking, I also shift to neutral and put handbrake on, rather than sit on footbrake.

Well that sounds like a pretty insane thing to do.

If you have been giving the brakes a really good licking to the extent that the discs and pads are really hot then, if you sit with your foot on the footbrakem the pads are (obviously) presing on the face of the disc.

If you are stopped for a few minutes like this then the other 80-odd percent of the disc cools disproportioantely to the area covered by the pad, caliper etc and thus a hot spot is created.

Do this a few times and it is perfectly feasable to warp oterwise good discs.

And cook pads.....

[markm730]

don't know if your interested or not...
just replaced the front discs and pads on mine and got them from 'Brakes International' at Rochdale. they have a decent website that does mail order aswel for those not in the collection / over the counter area, cheaper than GM parts if cost is an issue and last a good while aswel. the last set i replaced lasted 5years with several european trips on that.
cheers 

[Dave Elite]

What you doing, warping them? Or just wearing away?


TBH, I've founf the genuine GM ones pretty indestructable, though after a spanking, I also shift to neutral and put handbrake on, rather than sit on footbrake.

Well that sounds like a pretty insane thing to do.

If you have been giving the brakes a really good licking to the extent that the discs and pads are really hot then, if you sit with your foot on the footbrakem the pads are (obviously) presing on the face of the disc.

If you are stopped for a few minutes like this then the other 80-odd percent of the disc cools disproportioantely to the area covered by the pad, caliper etc and thus a hot spot is created.

Do this a few times and it is perfectly feasable to warp oterwise good discs.

And cook pads.....

Ha ha, I thought he meant to help him slow down!!

[aaronjb]

Ha ha, I thought he meant to help him slow down!!

that would be rather ... 

[Andy B]

don't know if your interested or not...
just replaced the front discs and pads on mine and got them from 'Brakes International' at Rochdale.  ....issue and last a good while aswel. the last set i replaced lasted 5years with several european trips on that.
cheers 

The discs bought for my Senator from there were cr4p. They ran out of true within about 3/4000 miles. Needless to say they weren't interested when I complained ..... I'd fitted them wrong apparently
Bit the bullet & bought Vauxhall discs (in the time before ABS had TC card  ) and had no further problems.

[Entwood]

"Proper" information on brakes, how they work, and how to look after them ....  well worth a read .. especialy the bit about "warped" brakes ....

 

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

[TheBoy]

What you doing, warping them? Or just wearing away?


TBH, I've founf the genuine GM ones pretty indestructable, though after a spanking, I also shift to neutral and put handbrake on, rather than sit on footbrake.

Well that sounds like a pretty insane thing to do.

If you have been giving the brakes a really good licking to the extent that the discs and pads are really hot then, if you sit with your foot on the footbrakem the pads are (obviously) presing on the face of the disc.

If you are stopped for a few minutes like this then the other 80-odd percent of the disc cools disproportioantely to the area covered by the pad, caliper etc and thus a hot spot is created.

Do this a few times and it is perfectly feasable to warp oterwise good discs.

And cook pads.....

Ha ha, I thought he meant to help him slow down!!

I think the handbrakes on both my Omegas wouldn't slow a pushbike down, useless bloody things