Braking fault

Be a bit careful about these. They actually stop the pad rotating in relation to the calliper. If absent, the pad can rotate and the pad backplate can then rub against the 'hub' of the disc. Discs can be machined off!

The only true test is that the pads retract (i.e. braking ceases) when brake pressure, however applied, is removed. The servo is irrelevant in this regard and will not affect brake balance. You could still have sticky pistons in any calliper - front or rear.

Yes.

Someone else will tell you about suspension/tyre-related issues that can produce imbalanced braking.

On or around Mon, 13 Dec 2004 20:15:58 -0000, "John" enlightened us thusly:

an offside brake isn't up to scratch. Being as they're 4-pot calipers on the front your test is not conclusive. Take it to an MOT place and ask if they will put it on their brake-tester. Pick your garage carefully and they'll do it for free, if they're not busy.

anti-rattle things won't affect the braking performance, especially by not being there.

yes.

I've had this problem which cures by very heavy multiple applications of the brake pedal while stationary. On mine it's a sticky calliper which seizes up every 6 months or so. Once cured it's Ok again.

TonyB

Thanks for this TB.: -

"I've had this problem which cures by very heavy multiple applications of the brake pedal while stationary. On mine it's a sticky calliper which seizes up every 6 months or so. Once cured it's Ok again."

It works a bit for me, but more like just for 6 minutes not 6 months.

Bit bullet and off with the wheels and out with the pads.

Yes its a very weak outboard cylinder on rear o/s caliper.

Try what I may it just doesnt respond with the same pressure as the inboard cylinder. And the disk it pretty bad too (although plenty of pad wear left)

So. New disk and ? new caliper if a repair kit doesnt free it up. Weird though how the piston moves ok but just doesnt transmit the correct pressure. Any ideas? Also I'm guessing if I need to replace one disc I should do them both. NB no brake fluid loss.

In article , John wrote:)

Always replace the disks in pairs and fit new pads at the same time. If you don't you'll have the same unequal braking forces you're trying to get rid of.

You may find you need to replace the calipers as well. Where the pistons have been exposed they rust and won't go back in without wrecking the seals.

I needed new disks on the front of the 110 this year and it ended up with new disks, pads and calipers for that reason.