Passenger front brake sticking on. Please help

[Dubstar81 10]

Hi guys. I have a problem that my passenger front brake is stuck on without retracting when the brake pedal is released. The drivers is doing it a little but not as much as the passenger. It is pretty much solid. I know the calipers are fine. Rears are free. I have checked them and the sliders are all greased and doing there job properly. I have new copper lines throughout and new braided hoses. The car was originally a KR but now is a 1.8T. I bought the car with a dead engine. I have fitted 280mm discs with girling calipers and ebc green stuff pads.

The rears are all new with a polo gti hub conversion with mk4 rear calipers.

The only thing that is not new are the master, servo and brake proportioning valve.

Has anyone had a similar snag? The front brakes are new and fully greased and sliding how they should. I am literally pulling my hair out now.

Any help would be great.

Thanks in advance.

Rich

[Dox 22]

To see if the hydraulics are holding the brakes on undo the nipples on each caliper in turn, if it spurts and the brake releases you have an hydraulic issue

[Dubstar81 10]

Thanks for your quick reply. I will do that tomorrow. Do you think the proportioning valve would cause an issue or if the rigid lines were incorrectly installed in the wrong ports on the valve?

I could with a drawing or diagram just to double check its done correctly.

[Dox 22]

Thanks for your quick reply. I will do that tomorrow. Do you think the proportioning valve would cause an issue or if the rigid lines were incorrectly installed in the wrong ports on the valve?

I could with a drawing or diagram just to double check its done correctly.

 

The LPV just reduces pressure to the rear, your issue is the front

[Simeon 0]

Did you remove the pistons from the front calipers prior to fitting them to check condition / replace seals?

 

If not I expect they need replacing, only about £25 for a kit from BiggRed and a couple of hours to remove, replace, refit :)