 Rear brake pressure regulator valve, Brake repair |
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| DamonsCarrera |
 Nov 24 2013, 06:26 PM
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#1
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Newbie  Group: Members Posts: 36 Joined: 2-September 12 From: Chicago IL Member No.: 14,886 Region Association: Upper MidWest  |
The brake pedal on my 914-6 is very spongy, even after repeated bleeding with a pressure bleeder. I isolated the problem to the brake-proportioning valve or pressure regulator. I cannot seem to get the brakes properly bled with this valve in the system.
I've read other posts by some here and it seems this valve is a source of some debate . Is there some trick to bleeding the brakes with it? Do I need to bleed the brakes the old-fashioned way, have someone push on the brake pedal? |
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Replies
| toolguy |
Nov 24 2013, 06:40 PM
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#2
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Senior Member Group: Members Posts: 1,276 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California 
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No trick concerning the proportioning valve. . . all that is inside of it is a sliding piston and a big spring. . . the piston moves and cuts off brake fluid to the rear calipers when a preset pressure is exerted. .
When I redid my entire brake system, I couldn't successfully bleed it with a pressure or vacuum single person system even after a dozen tries. . . . finally had a friend come over and and we did it the old way still took going all the way around 4 times to get a rock solid pedal. . What I finally figured out was when cracking the bleeders loose to bleed, air was seeping back into the calipers from the bleeder threads. . |
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Posts in this topic
DamonsCarrera Rear brake pressure regulator valve Nov 24 2013, 06:26 PM
DamonsCarrera Thanks for your input toolguy. I guess I will try... Nov 24 2013, 07:17 PM nine9three Everybody needs these: http://speedbleeder.com/ Nov 24 2013, 08:44 PM toolguy Air seeping past the bleeder threads on the calipe... Nov 24 2013, 08:46 PM 914_teener :agree:
+1 Nov 24 2013, 08:47 PM
gothspeed
:agree:
+1
+2 .... :agree: Nov 24 2013, 09:37 PM Mark Henry If you don't mind the super-fund clean-up mess... Nov 24 2013, 08:56 PM barefoot
If you don't mind the super-fund clean-up mes... Jan 25 2014, 12:01 PM ConeDodger Don't remove the valve. You will eventually co... Nov 24 2013, 09:05 PM walterolin Speed bleeders (above). I did my '70 4 cyl la... Nov 24 2013, 09:29 PM r_towle After you think you are done, drive it and slam th... Nov 24 2013, 09:47 PM DamonsCarrera Thanks for all the advice guys.
Mark, besides b... Nov 25 2013, 05:56 AM Eric_Shea There is no aftermarket valve.
It is a "pres... Nov 25 2013, 05:24 PM DamonsCarrera I think there are other aftermarket valves availab... Nov 25 2013, 07:47 PM Racer Chris There is nothing about the pressure regulator whic... Nov 25 2013, 11:32 PM Racer Chris
There is nothing about the pressure regulator whi... Dec 22 2013, 10:31 PM Eric_Shea
There's 100's of bias proportioning valv... Nov 27 2013, 04:24 PM DamonsCarrera Sorry for the late response. Work has been a bear... Dec 21 2013, 03:51 PM GeorgeRud I wonder if an additional bleeder at the highest p... Dec 21 2013, 05:41 PM DamonsCarrera The highest point would probably be the at the top... Dec 21 2013, 08:51 PM DamonsCarrera I've decided for now to replace the factory pr... Dec 22 2013, 01:13 PM r_towle
The brake pedal on my 914-6 is very spongy, even ... Dec 22 2013, 04:24 PM Eric_Shea Wrong move. All the Tilton can do is reduce fluid ... Dec 22 2013, 11:48 PM SirAndy Wrong move. All the Tilton can do is reduce fluid ... Dec 23 2013, 03:15 AM Racer Chris
Wrong move. All the Tilton can do is reduce fluid... Dec 23 2013, 08:30 AM Jeff Hail
[quote name='Eric_Shea' post='1973906' date='Dec ... Dec 23 2013, 03:29 PM Eric_Shea I disagree. ;) Dec 23 2013, 02:22 PM Eric_Shea You boys have fun... I agree on the pressure aspec... Dec 23 2013, 04:27 PM DamonsCarrera Don't know what the argument is about. It see... Dec 25 2013, 03:25 PM DamonsCarrera Well, in case anybody is following this thread ...... Jan 24 2014, 09:39 PM Bob L.
So next on the agenda, after making a permanent ... Jan 25 2014, 04:29 PM 914_teener I would think your next move is..... if you want t... Jan 24 2014, 10:23 PM DamonsCarrera Yes, true. I set the valve according to the chart... Jan 25 2014, 10:10 AM stugray Which model tilton did you get? Did it fit easily ... Jan 25 2014, 11:20 AM DamonsCarrera @barefoot
I think Mark was referring to cracki... Jan 25 2014, 12:23 PM 914_teener I have re-read your posts and I have a few questio... Jan 25 2014, 02:54 PM DamonsCarrera @ 914 teener
The difference between a static valv... Jan 25 2014, 05:40 PM 914_teener Ok....so if it is static then the output will be l... Jan 25 2014, 06:05 PM DamonsCarrera @ 914 teener
I'm not sure how you mean to use... Jan 25 2014, 08:03 PM flypfi DamonsCarrera - I realize this is an old post, but... Nov 21 2016, 04:12 PM |
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