Brake discs- corrosion

[Patrick Bateman]

How often are you forced into changing yours due to corrosion?

The Trophy is a second car but still gets used a few times a week. Regardless, I find the rear discs especially always end up corroding quite badly.

Fronts at the minute are apparently a bit corroded on the inside too, plenty of life left in the pads. The 'bite' to the pedal isn't really there now when braking hard, even after a good few stops from speed.

Obviously the heavy front brake bias won't help matters with the rears but has anyone had any joy in staving this off by making sure the car doesn't go too long between a few hard stops, say 60-20mph repeated a few times?

Seems like mine are now past the point of no return and will need replaced.

 

[Usr117063]

Are they oem discs/pads? My rears had cheap discs and pads and were useless, I fitted just some oem pads and that cleared alot of the rusty layer out in the first outing, bite better as well. 12 quid off euro car parts when sale (when isnt there)

I got some HC brembo UV coated front discs and they were so clean, looked brand new when I took them off. I now use HC 300mm fronts because of 4 pots and they are still very clean

 

[Patrick Bateman]

Not sure what the front were as the garage supplied them at the time, probably pagid or brembo from ECP.

Rears are Renault though.

 

[TheEvilGiraffe]

Give the calipers a service... maybe they're not as free as they should be.

Never replaced discs due to rust.. it's a bare surface of metal every time you brake (in theory)... they get surface rust after a rain shower.

Old Scoob sat for 3+ months.. clutch had rusted itself engaged... brakes were awful, but a few miles of driving and braking and they're back to life.

 

[DrR]

Put WD40 on them?

 

[Usr117063]

Well the pagids are cheaper so maybe they went for them, I had all cheap ones put on back when I didn’t diy, they were awful, got brake fade within a second of braking from 120, scary. Not sure on rears but for fronts the uv Coated Brembos will definitely stay clean

 

[Patrick Bateman]

Give the calipers a service... maybe they're not as free as they should be.

Never replaced discs due to rust.. it's a bare surface of metal every time you brake (in theory)... they get surface rust after a rain shower.

Old Scoob sat for 3+ months.. clutch had rusted itself engaged... brakes were awful, but a few miles of driving and braking and they're back to life.

The rear calipers have just been replaced and I refurbished a set for the front last year.

Discs were last changed a good while before that though so hopefully chucking new ones on with the good calipers will help stop excessive corrosion.

 

[Patrick Bateman]

Well the pagids are cheaper so maybe they went for them, I had all cheap ones put on back when I didn’t diy, they were awful, got brake fade within a second of braking from 120, scary. Not sure on rears but for fronts the uv Coated Brembos will definitely stay clean

Are the Brembo discs ECP list likely to be these?

 

[Usr117063]

Are the Brembo discs ECP list likely to be these?

I cant say for certain unfortunately, with the sale price it would be a good deal though.

These are the ones
http://www.roadtrackraceparts.com/b...v-coated-front-renaultsport-clio-172-182.html

 

[Patrick Bateman]

I cant say for certain unfortunately, with the sale price it would be a good deal though.

These are the ones
http://www.roadtrackraceparts.com/b...v-coated-front-renaultsport-clio-172-182.html

I've been speaking to George as well, handy to know.

 

[JB21]

My rears where always corroded and didn't seem to clear even when on track. I then rebuilt them using the biggred kit and they clear up fine now. Another way to clean them up is by pulling the abs fuse reverting the system to 50/50 bias but if the callipers are not working effectively then it wont help much anyway.

 

[Crybert]

The rear calipers don’t do much work so it’s inevitable they’ll show surface rust. You don’t need to replace discs because of surface rust..

 

[JB21]

The rear calipers don’t do much work so it’s inevitable they’ll show surface rust. You don’t need to replace discs because of surface rust..

They do 33% of the braking if working properly.

 

[Patrick Bateman]

'Surface' rust is one thing but not all corrosion is equal. If it was just that it'd soon clean up with a few emergency stops from 60mph.

 

[flebay]

How often are you forced into changing yours due to corrosion?

The Trophy is a second car but still gets used a few times a week. Regardless, I find the rear discs especially always end up corroding quite badly.

Fronts at the minute are apparently a bit corroded on the inside too, plenty of life left in the pads. The 'bite' to the pedal isn't really there now when braking hard, even after a good few stops from speed.

Obviously the heavy front brake bias won't help matters with the rears but has anyone had any joy in staving this off by making sure the car doesn't go too long between a few hard stops, say 60-20mph repeated a few times?

Seems like mine are now past the point of no return and will need replaced.

Driving around with the handbrake on will clear the corrosion off no problem, think of it as a DIY disk skim.