Hi Everyone,

 

Since collection from a main dealer last September my Superb had a grinding coming from the rear brakes whenever applying them. I presume this was down to it being laid up for a small while before sale. A few aggressive braking sessions improved it but on heavy sudden braking it sounds quite loud dull sound coming from the rear of the car. The last time I heard this noise was back in the day when i had a Subaru impreza that burnt its pads down to the metal back plate!

 

On closer inspection I could see my rear pads are getting low (5mm on pad surface at most) and the disks have an encroaching rusty border on the outer and inner diameter of the disk surface. I have another VAG car that operates perfectly fine and looks very similar in terms of the brake disk condition albeit on my Superb it looks a bit more advanced. There's no play in the wheel bearings so I'm comfortable it's probably not that.

 

I was going to change the pads front and back as its fairly straight forward and see if that improves it, but but what do you think about the disks (one pictured below).

 

My Superb is currently on 46,000 miles.

 

 

 

 

As well to change those discs when you are stripping down and cleaning  up those calipers and servicing and doing a brake fluid change and new pads since it is you doing it.

Parts only no labour cost.

 

 

Yeah I will probably change the disks to be fair. It's an extra faff I was hoping to avoid but it seems a shape to slot some new pads in for them then to become worn down by knackered old disks hey.

If the back side of the discs are not delamainating as some do, and the pads have meat on them then go get the engine heated up and have a run and do some spirited driving and give the brakes an Italian Tune-up.

 

Clean off the braking surface as many a car trader does pre-sale.    If the pads are shagged and the calipers sticking and the brake fluid has too much H2o in it then that is not what you want to be doing.

 

Winter is not over,

change for the new parts when the lovely warm summer is just around the corner. 

Edited 31 January, 20233 yr by toot

51 minutes ago, ffvrs said:

my rear pads are getting low (5mm on pad surface at most)

Or, as we mostly call it, "half-worn".

22 minutes ago, KenONeill said:

Or, as we mostly call it, "half-worn".

Yeah the default dealer response hey.

The rear 300x12mm brake discs start at 12mm thick, and have a minimum thickness of 10mm.

 

If the rear brake discs still have over 11mm of thickness I would just fit new rear brake pads as the discs themselves look quite smooth apart from some deep rust spots.

 

Maybe clean them up first by using the handbrake little and often when going down hill. Don't get them red hot as there's no need for that, as little and often will get the surface polished up.

 

Don't do spirited Italian style driving because that wastes fuel, and using the foot brake mainly wears the front brakes, not the rear brakes. It's the handbrake you want, and only downhill to save fuel.

 

Edited 31 January, 20233 yr by Carlston

& when you have an e-brake that is not so easy with the rear brakes.

You are supposed to be able to apply the e-brake in an emergency while moving or the passenger is as you have a heart attack or just fall asleep from boredom.

 

It is applying the e-brake down hills, or in a multstorey car park etc.  Not!

5 minutes ago, toot said:

& when you have an e-brake that is not so easy with the rear brakes.

You are supposed to be able to apply the e-brake in an emergency while moving or the passenger is as you have a heart attack or just fall asleep from boredom.

 

It is applying the e-brake down hills, or in a multstorey car park etc.  Not!

 

Good point about the electronic rear brakes.

 

The old style cable operated rear brakes are so much better...at least for cleaning up the rear brake discs.

yes i would have tried the old handbrake method by now only for the fact they are e-brakes. 

Have ordered some more pads and disks so will probably change the both.

If you have DSG, put the car into eco mode and it’ll bring the rears to life.

 

I had my rear disks changed to brembos because of the padding but OE pads done by my local Skoda dealer

@Danoidcould you explain what you mean about ECO bringing the rears to life?

Do you mean it will have the rear brakes applying going down hill?

Yes please explain what you mean by that.

 

Is it similar to using adaptive cruise and it brakes for you (does it brake the back or all)?

20 hours ago, toot said:

@Danoidcould you explain what you mean about ECO bringing the rears to life?

Do you mean it will have the rear brakes applying going down hill?

If you’ve got a DSG it’ll use engine braking or DSG holds the revs (not 100% sure)

 

but when you put the car into eco it does a lot of coasting, so when you apply the brakes you need to hold down for longer, which then clears the crap off the rear a lot better.

 

I make it a habit to engage eco at least once a month just to clear the brakes up.

 

so basically with eco on, you’ll be coasting more and able to apply the brakes for longer  

I don't know if i'm being stupid but i can't understand how in ECO mode that results in more brakes usage. Surely when you press it in any mode the results are the same i.e. its a driver input thing.

I've tried eco mode and I don't use the brakes any different to what i would in any other mode. I get the absence of engine breaking when it slips into neutral but other than that... it makes no sense.

 

Searching through the forum on this someone else had raised the same query on this.

 

I don't know the previous driver's history of my car but I do use adaptive cruise quite a lot. I've always wondered how the braking system slows the car suddenly. Is it just using the motors on the rears to provide that slowing or is it doing it for all brakes?

@Danoid

When you are Coasting and you touch / dab the brake or touch the accelerator the DSG engages gears again.  

Then you can go back coasting when no load on the engine.

 

What engine and DSG has your car got?

 

I have only one foot, and have driven many DSG vehicles since 2009, i virtually never use the brake pedal even on hill roads in Scotland & my own cars discs are usually red with rust from no use.  I use coasting lots and i hypermile.   

Coasting does not require more use of the brakes or gives the rear brakes more use.

Edited 1 February, 20233 yr by toot

24 minutes ago, toot said:

@Danoid

When you are Coasting and you touch / dab the brake or touch the accelerator the DSG engages gears again.  

Then you can go back coasting when no load on the engine.

 

What engine and DSG has your car got?

 

I have only one foot, and have driven many DSG vehicles since 2009, i virtually never use the brake pedal even on hill roads in Scotland & my own cars discs are usually red with rust from no use.  I use coasting lots and i hypermile.   

Coasting does not require more use of the brakes or gives the rear brakes more use.

I’ve got the 6 speed, unless it’s different on 7 speeds.

 

When I leave my house, just before the junction I begin to let off the accelerator the cars already slowing down and barely need to press the brakes

 

If I do the same thing with eco on and coming to a slow stop I’ve already been applying he brakes for a good 5 seconds. If I do that for the rest of my journey by the end my discs look brand new again

Sounds to me like a driving style thing. The extra coasting is causing @Danoidto brake harder/more which is having the effect of cleaning the brakes off.

I think most would use eco as designed to lift much earlier than normal and coast and then tap a pedal to engage a gear for a little bit of engine braking near the stopping point.

The use of eco doesn't necessarily make the car use the brakes more. It's how you make use of the "feature".

1 hour ago, MarkyG82 said:

Sounds to me like a driving style thing. The extra coasting is causing @Danoidto brake harder/more which is having the effect of cleaning the brakes off.

I think most would use eco as designed to lift much earlier than normal and coast and then tap a pedal to engage a gear for a little bit of engine braking near the stopping point.

The use of eco doesn't necessarily make the car use the brakes more. It's how you make use of the "feature".

This is my thoughts exactly

@ffvrsFortunately you have the car, have been issued with the advice, so you can try it.

See if you can get that corrosion gone on the rear discs with light braking applying the pads to the discs.    Not just clearing some cosmetic rust as a Skoda might get parked a few hours or overnight, or after a car wash.

 

The only difference of a DSG 6 or 7 wet clutch DSG or any DQ200 cars and a petrol or diesel engines with be 'modes' and if the car does have ECO, and if 'Coasting' is enabled and if it is a car that has to be in ECO to have Coasting. 

 

It helps when people say what engine, gearbox they have and what age of car.  Not all are the same.

 

http://briskoda.net/forums/topic/456858-eco-mode-coasting

http://briskoda.net/forums/topic/437857-making-the-most-of-eco-and-coasting

http://briskoda.net/forums/topic/502329-coasting-in-eco

http://briskoda.net/forums/topic/476144-problems-with-eco-drive-coasting

http://briskoda.net/forums/topic/494047-coasting

 

 

Edited 2 February, 20233 yr by toot