Soft brake pedal

Christophe.m · 05-09-2012, 06:21 PM

Hello everybody, I hope you had great vacation

So, from a couple of time I feel like the brake pedal is a little bit soft and goes too fare... I have to brake one time a little bit and then the second time the pedal is short and hard...

Today my CSL was at BMW for inspection II and I ask a friend who work there about my problem. After checking he told me than he saw nothing with a computer, only the pressure sensor of the AMB had a old code but wasn't active...

For information, I'm using ALCON CSL CUP brake kit from Thorney (street version), AP Racing 600 brake fluid, the paddle are around 30% and the rotor are OK.

I don't think the pedal was like this when I installed the brand new kit for the first time...

Any ideas ?

thank you

_Nathan_ · 05-09-2012, 07:04 PM

Change the fluid

83SY · 05-09-2012, 07:50 PM

Stop putting hand cream on your pedal rubbers

billyboysm3 · 05-09-2012, 08:33 PM

Brakes not bleed properly I reckon.

**alexk** · 05-09-2012, 08:55 PM

I think you need to bleed them using the GT1.

Christophe.m · 06-09-2012, 12:56 PM

I ordered the ATE superblue racing fuid instead the AP 600... My AP is about 5 months old and I used it 1 day magny-court + 30laps Nurburgring + 1 day SPA for a total of about 10'000 km.

I ll see tonight if the feeling gonna be better...

uncle benz · 06-09-2012, 02:08 PM

Try bleeding it with the ignition switched on. You'll find the warning light will come on the moment you open the first bleed nipple. Leave it like that while you bleed all four corners. I've had success getting the elusive bit of air out like that.
Alcons all round? They do give a slightly longer pedal travel than other bbk's I have found.

05-09-2012, 06:21 PM	#1
Christophe.m S2 - Picking it up Join Date: Nov 2011 Location: switzerland Posts: 50 Casino cash: $730	Soft brake pedal Hello everybody, I hope you had great vacation So, from a couple of time I feel like the brake pedal is a little bit soft and goes too fare... I have to brake one time a little bit and then the second time the pedal is short and hard... Today my CSL was at BMW for inspection II and I ask a friend who work there about my problem. After checking he told me than he saw nothing with a computer, only the pressure sensor of the AMB had a old code but wasn't active... For information, I'm using ALCON CSL CUP brake kit from Thorney (street version), AP Racing 600 brake fluid, the paddle are around 30% and the rotor are OK. I don't think the pedal was like this when I installed the brand new kit for the first time... Any ideas ? thank you __________________ Coupe Sport Leichtbau

05-09-2012, 07:04 PM	#2
_Nathan_ Driving it like I nicked it Join Date: Sep 2008 Posts: 2,099 Casino cash: $13060	Change the fluid __________________ Nathan

05-09-2012, 08:55 PM	#5
alexk Driving it like I nicked it Join Date: Mar 2009 Posts: 2,784 Casino cash: $29947	I think you need to bleed them using the GT1. __________________ www.clubcsl.com - I am a BMW Motorsport fan ! My youtube channel is here

06-09-2012, 12:56 PM	#6
Christophe.m S2 - Picking it up Join Date: Nov 2011 Location: switzerland Posts: 50 Casino cash: $730	I ordered the ATE superblue racing fuid instead the AP 600... My AP is about 5 months old and I used it 1 day magny-court + 30laps Nurburgring + 1 day SPA for a total of about 10'000 km. I ll see tonight if the feeling gonna be better... __________________ Coupe Sport Leichtbau

05-09-2012, 07:50 PM	#3
83SY S6, Sport On, Traction Off Join Date: Feb 2012 Location: Somerset Posts: 1,577 Casino cash: $4530	Stop putting hand cream on your pedal rubbers

05-09-2012, 08:33 PM	#4
billyboysm3 CSL Register Uber-poster! Join Date: May 2011 Posts: 3,000 Casino cash: $25192	Brakes not bleed properly I reckon.

06-09-2012, 02:08 PM	#7
uncle benz S4 - Getting the hang of it Join Date: Nov 2009 Location: West Sussex Posts: 155 Casino cash: $5680	Try bleeding it with the ignition switched on. You'll find the warning light will come on the moment you open the first bleed nipple. Leave it like that while you bleed all four corners. I've had success getting the elusive bit of air out like that. Alcons all round? They do give a slightly longer pedal travel than other bbk's I have found.