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[Iainv6]

Hi all,my new 2000 model V6 estate behaves uber well,apart from braking at about 50 or so,then i get steering wheel judder.

This does not seem to happen at ANY other speed,even at 90 etc,right up to the point that the car reaches 50ish

wheel ballancing issue maybe? or something worse??

any input will be apreciated

cheers

Iain

[hotel21]

First obvious stop is wheel balance, I would suggest.  Wobble only present under braking?  Then its more likely a warped disc.  If discs are old with a hefty wear lip on the outside edge, worth replacing across the axle with VX new and genuine.  Only £60 on Trade Club.  Pattern parts not worth the bother, to be honest.  Must be someone close to you who has TC and can assist??

[Chopsdad]

First obvious stop is wheel balance, I would suggest.  Wobble only present under braking?  Then its more likely a warped disc.  If discs are old with a hefty wear lip on the outside edge, worth replacing across the axle with VX new and genuine.  Only £60 on Trade Club.  Pattern parts not worth the bother, to be honest.  Must be someone close to you who has TC and can assist??[/quote]

That may be you Broocie.  I agree with the warped discs as I had same problem on a Cav a few years back......driving to hard and super heating the discs, whizz through a puddle etc, can cause them to cool to quickly too and warp.

[Entwood]

Slightly off topic - but related perhaps ??  Found this on the autobahnstormers site ...

To avoid warped discs and glazed pads, follow these bedding in procedures and you will get the best out of your new brakes.

Please note, some disc/pad manufacturers advise slightly different bedding in procedures - please refer to the documentaion that comes with your new discs/pads.

This information was adapted from the PPC magazine article on brakes - it's worked brilliantly for me and I haven't had any warped discs since I followed these rules.

Replace your disks first
- Fit the new discs with old pads
- Apply your brakes moderately from 50mph to 30mph and release
- Drive for half a mile in between each application to allow to cool down
- Repeat approx. 30 times

Fit new pads
- Drive with moderate braking for 200 miles.
- Do not execute hard braking until the resins in the pad are baked
- Do not use minimal braking as it will just end up glazing the pads.

Tips
- Don't fit new pads and new discs at the same time. If you are changing the discs and pads, do them seperately - they both have different bedding in requirements.
- Never leave your foot on the brakes and never brake to a complete standstill - This will keep the hot pad pressed onto one part of the disc while the rest of the disc cools down around it. This causes warped discs. Use your handbrake or put it in park if it's an auto.

Follow those rules and you will not be disappointed with your brakes and you won't get warped discs.

Anyone any thoughts ?? especialy as I'm doing mine next month .....

[hotel21]

First obvious stop is wheel balance, I would suggest.  Wobble only present under braking?  Then its more likely a warped disc.  If discs are old with a hefty wear lip on the outside edge, worth replacing across the axle with VX new and genuine.  Only £60 on Trade Club.  Pattern parts not worth the bother, to be honest.  Must be someone close to you who has TC and can assist??[/quote]

That may be you Broocie.  I agree with the warped discs as I had same problem on a Cav a few years back......driving to hard and super heating the discs, whizz through a puddle etc, can cause them to cool to quickly too and warp.

 
Just noticed where Iain posted from!   Yup, that would be me then as its only about 10 miles or less away!

Iain - PM me with contact details, if you wish, and I can pop round and lend an ear/eye and sort summat out!  

[hotel21]

Slightly off topic - but related perhaps ??  Found this on the autobahnstormers site ...

To avoid warped discs and glazed pads, follow these bedding in procedures and you will get the best out of your new brakes.

Please note, some disc/pad manufacturers advise slightly different bedding in procedures - please refer to the documentaion that comes with your new discs/pads.

This information was adapted from the PPC magazine article on brakes - it's worked brilliantly for me and I haven't had any warped discs since I followed these rules.

Replace your disks first
- Fit the new discs with old pads
- Apply your brakes moderately from 50mph to 30mph and release
- Drive for half a mile in between each application to allow to cool down
- Repeat approx. 30 times

Fit new pads
- Drive with moderate braking for 200 miles.
- Do not execute hard braking until the resins in the pad are baked
- Do not use minimal braking as it will just end up glazing the pads.

Tips
- Don't fit new pads and new discs at the same time. If you are changing the discs and pads, do them seperately - they both have different bedding in requirements.
- Never leave your foot on the brakes and never brake to a complete standstill - This will keep the hot pad pressed onto one part of the disc while the rest of the disc cools down around it. This causes warped discs. Use your handbrake or put it in park if it's an auto.

Follow those rules and you will not be disappointed with your brakes and you won't get warped discs.

Anyone any thoughts ?? especialy as I'm doing mine next month .....

Sounds fair, if you intend to use the brakes at full chat ASAP.

Otherwise, fit as a complete set (ensure all grease/protective is removed first) then easy use of brakes with infrequent hardish 70 to 20 braking bursts, traffic permitting, to get rid of glaze and ensure pads bed in well.  After a couple of hundred miles, jobs a good 'un.  

[Chopsdad]

 

I thought all you Jocks knew each other  

[Markjay]

Had something similar, vibrations when braking from around 70mph down to 50mph, I changed both front wheel bearings, brake discs and pads, and the problem was solved (I think that changing the discs and pads is what sorted it, but as I needed to change the bearings anyway I did at the same time so I can't tell for sure).

[Martin_1962]

Discs before pads?

Won't that create problems with wear pattern on the new discs.

Never seen a worn disc which was flat.

[ians]

I guess its only for a short period - probably not long enough to damage the disk - but a lot of hassle in my view, basically having to refit pads twice.

[Markjay]

The previous discs and pads were installed by Vauxhall as a set and lasted 25k before I had a problem.

I now installed them as a set again and except to get another 25k out of them.

Possibly if you follow the procedure they suggest you will get more, but hey, 25k is good enough for me so not sure it's worth the trouble...

[TheBoy]

The previous discs and pads were installed by Vauxhall as a set and lasted 25k before I had a problem.

I now installed them as a set again and except to get another 25k out of them.

Possibly if you follow the procedure they suggest you will get more, but hey, 25k is good enough for me so not sure it's worth the trouble...

I want to change out my pattern ones, but too tight to until the pads are worn out.  They have gone 30k, discs look untouched (though have been skimmed under warranty), pads half worn.

[Iainv6]

First obvious stop is wheel balance, I would suggest.  Wobble only present under braking?  Then its more likely a warped disc.  If discs are old with a hefty wear lip on the outside edge, worth replacing across the axle with VX new and genuine.  Only £60 on Trade Club.  Pattern parts not worth the bother, to be honest.  Must be someone close to you who has TC and can assist??[/quote]

That may be you Broocie.  I agree with the warped discs as I had same problem on a Cav a few years back......driving to hard and super heating the discs, whizz through a puddle etc, can cause them to cool to quickly too and warp.

 
Just noticed where Iain posted from!   Yup, that would be me then as its only about 10 miles or less away!

Iain - PM me with contact details, if you wish, and I can pop round and lend an ear/eye and sort summat out!  

Hi sorry it took me awhile to reply,but i didnt get time to check the forum out at work today
 thank's for the offer to look at my Omega,i will see how the brake shudder goes driving into work in Edinburgh over the next couple of day's,if it doesnt miraculously sort itself out,i'l PM you Friday and see if we can arrange a meet up at some point.

Thank's again to you,and everyone who replied

cheers

Iain

[hotel21]

 

[Mike Collins]

25K between disc changes? I would be changing mine every nine months. Original disks now at 120K, thickness is 25.5mm.

I have found strange judder caused by dry/corroded pins that the calipers slide on.