Front Brake Question, Venting Clearance and Bleeders |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Front Brake Question, Venting Clearance and Bleeders |
Highland |
Sep 3 2019, 09:40 AM
Post
#1
|
Senior Member Group: Members Posts: 513 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California |
This is a '73 with rebuilt calipers and proportioning valve. I first gravity bled the brakes in the recommended order. I then switched out the top bleeders to speed bleeders and bled the brakes twice waiting a couple of days between the first and second speed bleed. So far I've used roughly 1.3 L of brake fluid.
Questions: 1) My front left caliper seems fine, but the front right seems to bind. I cannot get a shim between the pad and rotor. When I spin the wheel it goes around maybe a bit over one revolution before stopping. Is there a way to adjust this? Will the clearance set when I drive the car and start braking harder? Is this a result of air in the line? (Car is not driveable now, no engine) 2) When I did the gravity bleed with the normal bleeders brake fluid wept from the bleeder threads. Should a sealer be applied to the threads to prevent this? The speed bleeders seem to have a thread coating and do not leak from the threads when open. |
Highland |
Sep 12 2019, 03:02 PM
Post
#2
|
Senior Member Group: Members Posts: 513 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California |
Okay, I think I have things almost sorted. I was using aftermarket pin clips on the front brakes which seem to cause some binding. I switched back to my original pin clips and everything appears normal now. The confusion about the rear e-brakes not returning to the release position was because the rebuilder put the return springs backwards.
On the rear brakes the right side seems to be performing normal. The left rear e-brake does not fully engage when the handle is pulled. Vent clearance is set to .01". I blead the brakes again with the same results. The cables are adjusted with no slack in the release position. So any advice on what's going on with the rear e-brake? Is this a result of air in the lines? The car is not derivable so I cannot drive and bleed until a later date. My understanding is the inner pad is suppose to force the rotor against the out pad. How is that possible if the calipers and rotor are fixed? I just want to make sure there's no possibility of a caliper assembly error. I normally wouldn't be concerned but they assembled the e-brake springs backwards (in both calipers) and also assembled another unrelated drive component backwards, so I think they had a newbie working on my parts. (IMG:style_emoticons/default/sad.gif) |
Lo-Fi Version | Time is now: 26th June 2024 - 12:30 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |