Question about 1989 Volkswagen GTI
I bought the master cylinder and the voss cylinder in 1 unit so the push rod should already be ajusted because its already sealed in or so i think 1 ov the master cylinders that i bought what i av taken off the car having the same problem with it the rubbers inside was no good so now iam woundering if this units doing the same ? if i put a brand new master cylinder on would i then after ajust the push rod??
Posted on Aug 26, 2009
I had this same problem on my 90 Jetta but it was the master cylinder that was the problem, I first replaced the master cylinder because it was leaking badly. The new master cylinder I put on was a manufactured defect, the internal piston inside the master cylinder was not machined enough (10mills too long) so when you applied the brakes the piston would not move far enough to release the brakes but after 20 mins they would slowly release themselfs just as you said your brakes do. The only thing that can cause this problem (if you have changed everything) is the master cylinder or the brake pedal itself, did you do anything to the brake pedal or near it to change its movemment ? Make sure the brake pedal once depressed returns fully to the float position where it should be. I would try another master cylinder preferrable a used one from another vdub the same as yours, eg year,model and country of origin some parts are different if it was made in Mexico or Germany. Its going to be a pain in the *** to have to replace the master again but I see no alternative. There is one more thing you can check I just thought of....check all your brake lines from the master to the calipers for any signs of dents or sharpe curves if the metal brake line is bent too much it will restrict the flow of the fluid returning to the master cylinder after brake pedal release but not during braking. Good luck
Posted on Aug 01, 2009
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Posted on Jan 02, 2017
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