ST Brake Upgrade Knocking?

VenomS40 · Nov 8th, 2012, 13:57

The other day I was testing the brake out with some heavy braking. Since then I get a knock when braking, this isn't every time but if I'm reversing onto the drive and apply the brakes I get a knock and then it wont knock again until I go forward and apply the brakes again. It seems to be directional but cant work out where it is coming from?

I bled the brakes today and all was fine. I'd say there is a bit of travel in the brakes before you get to the biting point. I'm not sure if I'm meant to have this travel in the peddle or not and not sure what is causing this knocking noise?

Volvorforlife · Nov 8th, 2012, 14:45

Its your pads that are knocking. It should stop in a bit with normal driving.

VenomS40 · Nov 8th, 2012, 17:00

I thought as much as the caliper and disc's all seem solid. It doesn't happen all the time, just now and again.

I still think the peddle feels a little 'spongy' though? The MOT is due in Feb so may just wait until then and get the whole system checked out....?

benr7310 · Nov 8th, 2012, 17:40

Had that on the last car mate, its deffo movement in the pads cause they are 1mm too small or something.

You could shim it.. or just leave it.. it doesnt make a difference, i left it on mine until the pads needed changing again

VenomS40 · Nov 8th, 2012, 20:14

I'd imagine that it doesn't help flooring the brake either lol....

Just been reading/watching up on things on the net and going to adjust the peddle push rod to remove this excess play in the peddle. I don't think its anything with the system as once they bite on there sure do stop on the spot!!

Nov 8th, 2012, 13:57	#1
VenomS40 08 Volvo S40 SE Sport R-D Last Online: May 6th, 2016 23:08 Join Date: Jan 2011 Location: Gloucester	ST Brake Upgrade Knocking? The other day I was testing the brake out with some heavy braking. Since then I get a knock when braking, this isn't every time but if I'm reversing onto the drive and apply the brakes I get a knock and then it wont knock again until I go forward and apply the brakes again. It seems to be directional but cant work out where it is coming from? I bled the brakes today and all was fine. I'd say there is a bit of travel in the brakes before you get to the biting point. I'm not sure if I'm meant to have this travel in the peddle or not and not sure what is causing this knocking noise? __________________ Volvo S40 SE Sport R-Design + Winter Pack

Nov 8th, 2012, 14:45	#2
Volvorforlife Master Member Last Online: Mar 18th, 2013 19:20 Join Date: Feb 2012 Location: Midlands	Its your pads that are knocking. It should stop in a bit with normal driving. __________________ 11reg C30 2.0 R-design 12reg VW Touareg 3.0Tdi Escape 62reg C30 T5 R-design 62reg Land Rover Discovery 4 HSE

Nov 8th, 2012, 17:00	#3
VenomS40 08 Volvo S40 SE Sport R-D Last Online: May 6th, 2016 23:08 Join Date: Jan 2011 Location: Gloucester	I thought as much as the caliper and disc's all seem solid. It doesn't happen all the time, just now and again. I still think the peddle feels a little 'spongy' though? The MOT is due in Feb so may just wait until then and get the whole system checked out....? __________________ Volvo S40 SE Sport R-Design + Winter Pack

Nov 8th, 2012, 17:40	#4
benr7310 Master Member Last Online: Dec 29th, 2023 17:48 Join Date: Sep 2011 Location: Thurrock	Had that on the last car mate, its deffo movement in the pads cause they are 1mm too small or something. You could shim it.. or just leave it.. it doesnt make a difference, i left it on mine until the pads needed changing again __________________ V60 D5 215 (pre-facelift) Ex-S40 Sport 2.0d with 180bhp & 300lbft

Nov 8th, 2012, 20:14	#5
VenomS40 08 Volvo S40 SE Sport R-D Last Online: May 6th, 2016 23:08 Join Date: Jan 2011 Location: Gloucester	I'd imagine that it doesn't help flooring the brake either lol.... Just been reading/watching up on things on the net and going to adjust the peddle push rod to remove this excess play in the peddle. I don't think its anything with the system as once they bite on there sure do stop on the spot!! __________________ Volvo S40 SE Sport R-Design + Winter Pack

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