2006 octavia

[Graham8]

n/s/f brake applies without pressing the pedal.  Skoda garage suggests DSG box causing the trouble as the box is heating up and transferring the heat to the disc via the drive shaft. Comments please?

[Tilt]

That must be some heat transfer, no ?

 

It doesn't sound logical to me, but they know way more than I do, so long as they are not 'trying it on'  .

 

Is it a Skoda franchise garage? I would get a 2nd opinion from another garage, maybe a VAG specialist.

 

Has the DSG box had any servicing / oils changed at all?

 

How did you suss it was the n/s/f?

[Phil-E]

Hmmm... That sounds like a dodgy diagnosis to me.

 

Does the brake and wheel get hot after a drive?

 

Sounds more like a sticking calliper to me.

[Graham8]

N/S/F wheel disc so hot smoke was coming out wheel arch. calliper has been checked and when car stationary, works perfectly. I checked the temperature of the disc and the shaft after a short run and the shaft is 10 Degs and you can barely touch the wheel its so hot. It was a skoda dealer gave this diagnosis. He wasn't amused when I asked if the G/box was txmitting heat by Bluetooth.

[Phil-E]

If the calliper is fine then it's probably the pads that are sticking in the guides.

 

First thing would be to have the brakes checked over and cleaned up. It's quite common for the pads to get stuck and it just needs a wire brush and a good clean and re-grease.

 

Also if the disc and pads have got that hot they may need changing now anyway.

 

I definitely can't see how it's heat from the gearbox! If the gearbox is getting hot enough to transfer heat down the driveshaft and cause it to smoke then the brakes are the last of your worries!

[sniper29a]

not many brake hard enough for rear brakes to work.

usually rusted callipers. get refurbish kit.

 

my rear brakes were stuck as well. I replaced pads and cleaned callipers. once they started to brake. rear left got stuck...disc 500deg C and pads gone in 3000km

[trundlenut]

not many brake hard enough for rear brakes to work.

usually rusted callipers. get refurbish kit.

my rear brakes were stuck as well. I replaced pads and cleaned callipers. once they started to brake. rear left got stuck...disc 500deg C and pads gone in 3000km

The OP is talking about the front brakes.

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[sniper29a]

 

check out this video. 700deg C discs.

 

Your driving shafts would have to be glowing red to transfer heat from DSG to brakes ;-)

[sniper29a]

Phil how could front pads stick to disc if they are on metal clips?

 

 

it looks like bleeding is necessary and then see what happens.

 

 

I get smoking brakes but not by normal driving ;-)

[Tilt]

Phil how could front pads stick to disc if they are on metal clips?

 

 

it looks like bleeding is necessary and then see what happens.

 

 

I get smoking brakes but not by normal driving ;-)

The pads don't generally stick to the disc as such, they get rusted into the clips, resulting in them not releasing properly.

 

If the pads were stuck to the disc, you would definitely know about it when you tried to move the car, Lol.

 

(sorry for butting in, Phil).

Edited 22 January, 2016 by Tilt

[sniper29a]

The pads don't generally stick to the disc as such, they get rusted into the clips, resulting in them not releasing properly.

 

If the pads were stuck to the disc, you would definitely know about it when you tried to move the car, Lol.

 

(sorry for butting in, Phil).

never seen anything like that - perhaps rubbish brake pads?

 

front FN III callipers have clips and iron based material don't tend to rust on alu-alloy callipers ;-)

 

rear FS III callipers have have zinc platted metal guides, when installed correctly it won't stick. further more brake pad has got some sort of sticky pad, which keeps pad on calliper side (at least Ferodo supply this)

 

I don't know older generation callipers though.

[trundlenut]

never seen anything like that - perhaps rubbish brake pads?

front FN III callipers have clips and iron based material don't tend to rust on alu-alloy callipers ;-)

rear FS III callipers have have zinc platted metal guides, when installed correctly it won't stick. further more brake pad has got some sort of sticky pad, which keeps pad on calliper side (at least Ferodo supply this)

I don't know older generation callipers though.

How much salt is used on the roads in your area?

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[Tilt]

never seen anything like that - perhaps rubbish brake pads?

 

front FN III callipers have clips and iron based material don't tend to rust on alu-alloy callipers ;-)

 

The O P may have rubbish brake pads on his car. I do not know.

 

Aged pads can get rusted (or maybe, for arguments sake, just stuck) into the clips, but I have seen rusted clips.

 

I did not say they "rust on alu-alloy callipers", as you put it, and the pad holder will be steel.

Edited 24 January, 2016 by Tilt

[sniper29a]

How much salt is used on the roads in your area?

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More than in UK where snow rarely is ;-)

 

But you're island so salt is more problematic in your area. I remember my rusted exhaust on Subaru...until changed to stainless steel.

 

My brake system temperatures are usually around 500-700deg C...paint on brake pads are in tact and I've never seen rusted pads. Perhaps, rubbish OEM pads???

 

Never saw rusted front brake. Rear calliper carrier is only steel part, which needs to be cleaned during pad replacement.

 

Perhaps improper pad installation/assembly?

 

It is true that lifespan of my parts are fractional to common drivers. They have no time to rust, just to do their work

Edited 24 January, 2016 by sniper29a

[trundlenut]

More than in UK where snow rarely is ;-)

But you're island so salt is more problematic in your area. I remember my rusted exhaust on Subaru...until changed to stainless steel.

My brake system temperatures are usually around 500-700deg C...paint on brake pads are in tact and I've never seen rusted pads. Perhaps, rubbish OEM pads???

Never saw rusted front brake. Rear calliper carrier is only steel part, which needs to be cleaned during pad replacement.

Perhaps improper pad installation/assembly?

It is true that lifespan of my parts are fractional to common drivers. They have no time to rust, just to do their work

Salt, wet weather and a lot of muck on the roads is a problem here.

It's not so much corrosion as a build up of muck prevent the pads moving smoothly.

On the backs the steel shims that sit between the pads and carriers get in a right state and do cause the pads to stick.

It doesn't seem coincidental that there is a proliferation of threads about brake problems at the start of the year.

Having stripped the brakes on a number of cars I have owned there is almost always a lot of crap that has built up.

Also if you don't drive everywhere like a loon the brakes may not get much use and heat in them. Try driving a few miles everyday in traffic.

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[sniper29a]

Salt, wet weather and a lot of muck on the roads is a problem here.

It's not so much corrosion as a build up of muck prevent the pads moving smoothly.

On the backs the steel shims that sit between the pads and carriers get in a right state and do cause the pads to stick.

It doesn't seem coincidental that there is a proliferation of threads about brake problems at the start of the year.

Having stripped the brakes on a number of cars I have owned there is almost always a lot of crap that has built up.

Also if you don't drive everywhere like a loon the brakes may not get much use and heat in them. Try driving a few miles everyday in traffic.

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I'm always amused by problems of common drivers. If I had your problems, I would buy a new car every three months.

 

I'm driving in mountains roads where is gravel, mud and other rubbish. Furthermore, friction materials are everywhere...yes, there is no dust free pads ;-) If brakes don't dust and eat disc, they don't brake.

 

Yet, I never had problems you describe here.

 

My friend has got problem with disc distortion...as I've already said my brakes are usually around 500deg C. I had heat treated disc many times, yet they never lost run out.

 

What happen if you realise everything is your fault. Poor maintenance, ignorance and eExperts are common cause of 99% issues with cars.

 

If you use cheap rubbish, don't wonder it doesn't work. A car is reflection of its owner - if you don't care...well you know answer. 

[trundlenut]

I'm always amused by problems of common drivers. If I had your problems, I would buy a new car every three months.

I'm driving in mountains roads where is gravel, mud and other rubbish. Furthermore, friction materials are everywhere...yes, there is no dust free pads ;-) If brakes don't dust and eat disc, they don't brake.

Yet, I never had problems you describe here.

My friend has got problem with disc distortion...as I've already said my brakes are usually around 500deg C. I had heat treated disc many times, yet they never lost run out.

What happen if you realise everything is your fault. Poor maintenance, ignorance and eExperts are common cause of 99% issues with cars.

If you use cheap rubbish, don't wonder it doesn't work. A car is reflection of its owner - if you don't care...well you know answer.

So basically you hoon around everywhere, have very little idea of how other people drive but know more than everyone else put together.

So your driving style is the same as when you were in the UK?

Having driven about 250,000 km in a couple of Octavias I have probably spent about 4 hours cleaning the brakes up and only the first time was after I had a problem. Nothing like a bit of preventative maintenance.

I've often had salt crystals growing on the calipers, that should give you an idea of the amount of salt that can be used on our roads.

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[trundlenut]

Oh and I've never had a problem with warped discs. I have seen a build up of crud on the discs causing the same symptoms but I have always cured it without getting out of the car.

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[sniper29a]

So basically you hoon around everywhere, have very little idea of how other people drive but know more than everyone else put together.

So your driving style is the same as when you were in the UK?

Having driven about 250,000 km in a couple of Octavias I have probably spent about 4 hours cleaning the brakes up and only the first time was after I had a problem. Nothing like a bit of preventative maintenance.

I've often had salt crystals growing on the calipers, that should give you an idea of the amount of salt that can be used on our roads.

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that makes me wonder most. people have no idea how to use brakes effectively, yet their brakes don't work properly under normal braking situations. It makes you think.

 

In this forum is many eExperts pretending to know something. There is endless polemics, yet nothing has been resolved. People repeatedly asking and those some guys repeatedly "help" with useless theories. If someone dares to challenge theories of those eExperts...their usual reaction is "you know all and rest is idiots". How many times I heard it :-D

 

If you speak, you can't hear. If you can't hear or read, you can't learn.

 

I wonder what would happen if those who spent excessive energy on replies to simple facts I present (which are at least based on real life experience) and forcing their "truth", which is based on old wives stories, spread by eExperts.

 

salt crystals? you mean corrosion of alu-alloy, which looks like white salt crystals :-D

 

you know that ancient wisdom "Those who know don't talk and those who talk don't know." ~ Lao Tzu

 

I never cleaned my brakes. My car looks like rally car that finished a stage right now. There is rubbish inside wheel arches, arms, brakes, dust and so on. Yet, my brakes work. My brakes are often overheated, yet they work. It makes you think.

 

Either, I'm blind, old moron, which lives in dreamworld of perfection or there is something wrong with your maintenance procedures and overall knowledge.

[trundlenut]

If it looks like salt, tastes like salt and is soluble into water....

It's probably not aluminium.

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[trundlenut]

Oh and from description of your car and driving style you are obviously well versed in the morning commute many experience in the UK.

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[silver1011]

Road salt on my old vRS...

 

 

[Tilt]

you know that ancient wisdom "Those who know don't talk and those who talk don't know." ~ Lao Tzu

 

You are doing most of the 'talking'..............................................................Shrugs shoulders.

[wiilydog]

check out this video. 700deg C discs.

Your driving shafts would have to be glowing red to transfer heat from DSG to brakes ;-)

Wow have you been doing a spot of rally driving as your discs are glowing like wrc car after finishing a rally stage.

[sniper29a]

Wow have you been doing a spot of rally driving as your discs are glowing like wrc car after finishing a rally stage.

heavy race-style, most effective, balanced braking on alpine roads. furthermore, stuck rear callipers (I didn't know back then :-) I can't reproduce this result since rear brakes work now.

 

it was just a test - how much can those pads take.

 

Usual temp is around 500deg C

Edited 25 January, 2016 by sniper29a