22 replies to this topic

[PHB1969]

Hi Just had discs, pads and braided hoses put on (thank you Chris ). Brake pedal is fine most of the time but occasionally doesn't fully disengage after applying - I mean about 5 mm - and the brakes are still biting softly. The return spring is in good order and works ok. Seems more prone to stick on light application. Any ideas? Thanks Paul

[-Dab-of-Oppo-]

Do you mean the brake pedal is not coming fully back in the up right position or just that the brake pads are rubbing? If the former check the linkages in the pivot mechanism in the footwell, can you lift the pedal upwards to return it once you have taken your foot off? If you just mean the brakes themselves you probably just need to give it a few miles for the pads to contour to the discs slightly if everything put on was new as they rarely run perfectly true.

Edited by -Dab-of-Oppo-, 11 March 2012 - 05:02 PM.

[VXT Tim]

http://www.vx220.org...__fromsearch__1

[PHB1969]

http://www.vx220.org...__fromsearch__1

Thanks VXT Tim - the description in there is exactly what I have. Pads, discs and fluid are all new so will start with spring and bush/cable tie.

One post suggests fluid could be an issue but don't see how this could cause this - incidentally didn't do it before the brakes were changed - however today has been warmer and the old brakes perhaps didn't generate much heat.....but seems unlikely

Thanks for the link

Cheers

Paul

[VXT Tim]

I changed my fluid in an attempt to cure the issue but it had no effect.

[PHB1969]

Do you mean the brake pedal is not coming fully back in the up right position or just that the brake pads are rubbing? If the former check the linkages in the pivot mechanism in the footwell, can you lift the pedal upwards to return it once you have taken your foot off?

If you just mean the brakes themselves you probably just need to give it a few miles for the pads to contour to the discs slightly if everything put on was new as they rarely run perfectly true.

Dab-of-Oppo
It's the pedal not returning back up - yes I can lift the pedal back up (with my foot) to return it. It is only stuck on by about 5mm or so, but the brakes effectively stick on.

Will try the spring first, shortening by a couple of coils and check the bush and linkage.

Thanks for the info.

Regards

Paul

[PHB1969]

Have done the cable tie fix on the brake pedal where the servo rod linkage is. I noticed that there was lateral play - ie as you press the pedal, instead of it pushing the servo rod straight, there was some movement to the left. I have put a cable tie either side - wow what a PITA it is getting upside down in the footwell, particularly with the centre brace in place (that wouldnt come out).. !!! Took her out for a 35 mile blast and no sticking pedal - the ambient temperature was only about 10C, think it was a little warmer last week so fingers crossed it is fixed. Knowing my luck with all things mechanical, it has just behaved itself today..... Thanks for the suggestions of how to fix it. Paul

[PHB1969]

Well......there we go - sticking brake pedal again today......too good to be true last week!

The cable ties are still in place so next will be a shortened brake pedal return spring.

The part number is 9197817 so hoping that I can get a couple of spares from vauxhall - online cant seem to find stock!

Anyone else have any other suggestions - perhaps sticking pads to discs....? They are all brand new......

Only happened on the way home once brake temp was well up....?

Thanks

Paul

[VXT Tim]

Been out twice this week in mine in warm weather (when it appeared to happen most) and nothing. Shortening my spring has 100% solved my issue. I would bet (hope) you'll have the same outcome

[PHB1969]

Been out twice this week in mine in warm weather (when it appeared to happen most) and nothing.
Shortening my spring has 100% solved my issue.

I would bet (hope) you'll have the same outcome

Tim

How did you shorten it? The spring has the hook on either end and then folds back across the coils - effectively across the diameter of the coil (if that makes sense). That prevented me winding a couple coils down the spring (or perhaps I was just a little impatient?

I will try and get a spare first so I can "fiddle" with the existing one - but what a pain it is working down there - I've been down there twice and it's like working in a straight jacket.....!

[VXT Tim]

It was tricky, I had to use a couple of slim nose mole grips/pliers. I only shortened it to see if it was the issue, appears the spring has slackened over the years so a new one should sort the issue as well, I've just not got round to replacing it. There is obviously an issue with the springs used, the clutch spring snaps due to the longer pedal travel and over time as I said the brake one slackens.

[PHB1969]

Tim - thanks - will see if vauxhall have stock - one site suggests it's under £3 ish but they dont stock it!

[PHB1969]

Sorry - should have added - I dont have a clutch return spring......are they essential - I dont seem to have any problems without it.

[VXT Tim]

Mine snapped a long time ago and took a week or so to replace it. It always fully returned without the spring but for peace of mind on a £1k ish clutch replacement I bought a new spring

[LazyDonkey]

How are your calipers?

[PHB1969]

Sticking problem is still happening - grateful for any other suggestions.

[cabe]

Any more news on the sticking brake pedal problem ?? I have had the same problem when the brakes are warmed up " about 20 miles " Changed the fluid to mintex Dot 5.1 but still te same , So just ordered a new master cylinder...

[chris_uk]

If u stick your head where the pedals are there is a plastic bush connecting the pedal to the rod. This could of moved, it happened to mine aswell but 2 cableties later and it was sorted. Paul used a stronger spring aswel

[rizo9]

mine were sticking when hot, it turned out the drivers side inner piston was sticking out about 8mm and wouldn't return, i've stripped both calipers down, just waiting for new seals and pistons, the corrosion was pretty bad in both calipers. all clean and freshly painted too. just hope it solves the problem.

[LazyDonkey]

Yup mine was foobarred rear callipers.