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[old cruiser]

When applying the brakes (not particularly hard) at around the 60mph 'ish the steering wheel starts shaking (left and right as it were) rather than juddering, fitted new discs and pads and idler arm back in January, so hoping it's not the discs that are warping already after only 6,000 miles, has anyone had this with theirs and found the problem to be anything other than Discs, was under the car not so long ago and no other issues seemed apparent. any help appreciated .
Cheers Pete

[Jay w]

i have the same issue.....mine was warped discs  

found out by using a dial guage and measure the amount of warp

[Andy B]

...... so hoping it's not the discs that are warping already after only 6,000 miles, ....

Pattern discs lasted around 3/4000 miles on my Senator   New Vauxhall discs cured the problem completely.

[old cruiser]

Cheers guys ,  this is what i have been thinking about these discs hence yesterday I ordered a dial gauge and will be checking run-out on Friday if they are out then , I shall be returning them under warranty back to National via local motor factor from where I bought them, must say I've used these National discs for years and had no problems with them in the past, but Hey this is an Omega and they like to create problems!!
Cheers Pete

[cem_devecioglu]

general idea is if the car washed when the disks are hot and cold water is sprayed directly to disks they are damaged.

[TheBoy]

The pattern ones on my MV6 seem to be very prone to warping.

[Turk]

This may be of interest.

http://www.stoptech.com/tech_info/wp_warped_brakedisk.shtml

[old cruiser]

Cheers Mate, an interesting read
Cheers Pete

[sounds2k]

the other problem that can cause warping is braking from high speed to a standstill and then keeping your foot on the brake - autos tend to be more susceptible to this as the only other way of holding the car stationary after stopping is the handbrake ...

[justme]

the other problem that can cause warping is braking from high speed to a standstill and then keeping your foot on the brake - autos tend to be more susceptible to this as the only other way of holding the car stationary after stopping is the handbrake ...

just think of the heat generated in the disc in bringing that weight to a standstill, you do not really need high speed to create it.

[markey mark]

when you fit genuine discs  you need to ensure the hub is spotless and copper greased stops any further warping