Rule on bedding in new brakes

peter212693

peter212693

peter212693

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Hi all,

I will be changing the pads and disks on my focus in the near future. Now I know you need to give them 100 odd miles to "bed in" and no harsh braking. Why exactly is this? Also what if someone pulls out on you and you have to hammer the brakes, are the ruined?

Thanks
Pete
 
Ferodo DS2500 instructions:

1) Perform 25 to 30 trial brake applications, each of approximately 4 seconds, using around 50% of normal race pedal pressure. To shorten the procedure applications can be made along the straights as well as through bends.

2) On completion of trial applications return to the pit lane. Inspect the surface of the brake pads from the two wheels which have been working the hardest. There should be evidence of contact over the full pad area but without glazing. The pads are now ready to race.

Whilst we recommend that pads are inspected, if time does not allow this, assuming procedure (1) has been carried out and a short period of time has elapsed to allow the brake system to cool, the pads will be ready to race.

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Normal driving should be fine unless they're performance pads?
 
peter212693 said:
Now I know you need to give them 100 odd miles to "bed in" and no harsh braking. Why exactly is this?
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Not entirely sure mate but I think it's a little unfair to expect no harsh braking in the first 100 miles - what if you need to stop quickly?

To be honest, I went round the block with my left foot rested on the brake and just used my brakes as normal.
 
I only rest my foot on the brake very likely - similarly to what I do after washing the car to remove the surface rust from the discs. At least then i know when I reach the junction at the end of the road the car will stop. :p
 
peter212693 said:
I take it the harsh breaking gives a glaze on the disk from the new pads which kills them? Is this a layer that is on the pads for shipping that needs to be removed graduly?

Pete
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glaze is a smooth/shiney surface which isnt very good for braking perf.

Racing/braking at the last second will hurt new pads. Driving around with your foot resting on the brake is not very good at all as it will glaze them.

Normal braking will wear in pads fine. Just drive around like normal, and be extra cautious just in case they don't work very well.

Leeum said:
I only rest my foot on the brake very likely - similarly to what I do after washing the car to remove the surface rust from the discs. At least then i know when I reach the junction at the end of the road the car will stop. :p
Click to expand...

would be better off braking properly and then speeding back off then braking again etc etc. Not Hard and not with people behind you lol.

ie 40-20-40-20-40. :)
 
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When I change brakes on my car I usually go out when the roads are nice and quiet and bed them in a bit. I just find a straight A road and brake then accelerate off again and keep doing it increasing speed and then pressing the pedal a little firmer and for a longer duration. You can start to feel them biting in harder after quite a short time.
 
my red dots said go easy on them for 100mile or so, and then abuse them and try and get them to fade a few times.
 
My disks have arrived this morning and are covered in a oil type substance. I take it this is for protection during shipping and I just clean it off with some brake cleaner?

Thanks
 
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