Brake Problem

[john.conley]

Help please,steering wheel vibrates when I brake so replaced front rotors and pads and the problem went but after 6weeks 2thousand miles the problem returned so again fitted new rotors and again the problem went and the steering was fine but after approx another 2thousand miles the vibration is back,cant find anything wrong with the rotors or pads so this problem is driving me nuts,any help would be fantastic.PS I dont brake hard and have checked all the tie rods etc

[j.fro]

1. Check to be sure the front struts are tight at the fender mounts
2. Check the balance on your front tires

[jcb986]

Sticky pistons in the calipers can cause improper pad pressure on the rotors too. Did you seat the pads too the new rotors properly. This you do by getting on a stretch of highway and get to a speed of about 50MPH...then hit your brakes hard but not locking them up...do this about 3 times to seat the pads.

What brand of rotors and pads did you use.

[blue2000s]

Are you using the correct torque on the lug nots and tightening them in a star pattern?

[john.conley]

Originally Posted by jcb986

Sticky pistons in the calipers can cause improper pad pressure on the rotors too. Did you seat the pads too the new rotors properly. This you do by getting on a stretch of highway and get to a speed of about 50MPH...then hit your brakes hard but not locking them up...do this about 3 times to seat the pads.

What brand of rotors and pads did you use.

HI thanks for your reply,did bed the brakes in both times and were fine for several weeks then the shudder on steering when braking started again,I know if I replace them again it will be fine for a while!! people seem to think it mey be tie rods etc but cant be anything else but the brakes cos its fine when I replace the front rotors,it seems to be the left hand rotor because I replaced this one first and the problem went,pistons on the calipa seem to work but dont no what there like under load.many thanks John

[ppbon]

Are you using Porsche-brand rotors and brake pads, or something different?

[john.conley]

Originally Posted by ppbon

Are you using Porsche-brand rotors and brake pads, or something different?

Hi am using QE discs and pads!