Author Topic: Brake Proportioning Valve  (Read 1229 times)

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Online TexasT

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Brake Proportioning Valve
« on: February 09 2017, 06:14:06 PM »
All Right!
As we know I wrench on mine. You can too if you want, or not, up to you.
I had the brakes become not doing well. I had lost some pedal and it was having much more travel before it would start to have a pedal feel and the brakes would apply. I had this type thing happen but the pedal would come back as soon as I pumped it. But this didn't happen the last time and the pedal had a lot of travel. and it wasn't stopping well. I hit the brakes hard at high way speed and saw smoke out the rear so it was locking up the rear , not good.

I decided we would need a new proportioning valve as we were still running the original. I got on the interwebz and settled on a "new" valve from nos4gn
http://www.highwaystars.net/brake-proportioning-valve-replaces-gm-25509419-front-disc-rear-drum-brake-systems/

They offer one for disk/drum and another for four disk. They were on sale for $31.95 plus shipping
The new brass looks quite different than the original but the ports were in the correct places for a direct replacement.








It was kinda crundgy in there so I'm pretty sure it was stuck.
I went ahead and rotated the tires since I took the fronts off to make it easier to bleed. I had never done a gravity bleed before but decided I'd give it a whirl today. What a mess. I needed bigger catch things. It did make bleeding three out of four much easier.

In the end I'm glad that I was able to get her back to braking well, and a Big shout out to the lovely(At least to me) MRS. TexasT for the help bleeding.

I bought a new wagner master cylinder. I wasn't sure what the prob was and a mc swap is pretty easy. At least it usually is. I manged to get the hboost thing stuck on the mc snap ring, I pushed the pedal down and it wouldn't come back up. I had read about this but now I know it is the case so If you decide on a hydroboost the mc needs to clear the mc snap ring. I swapped the mc I had on it back on.


bent it up

On a side note what are people doing for lugs, studs and such for a weld wheel that needs a shank type lug nut and washer? I had the back wheels off, so I pulled out these wheels I bought a few years ago(OK, eleven yrs but whose counting?)


Looks like they will fit


I guess they aren't hub centric.


Looks like they were made in 01


Rich

"Goals without actions are just dreams."

Offline good2win22

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Re: Brake Proportioning Valve
« Reply #1 on: February 09 2017, 08:03:37 PM »
Cheapest shank type lugs I found were at summit racing. Search for a 12mm x 1.50


Set of 10 for $15.97
https://www.summitracing.com/parts/rnb-611-108/overview/year/1987/make/buick/model/regal
Jason

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Offline Steve Wood

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Re: Brake Proportioning Valve
« Reply #2 on: February 09 2017, 11:09:43 PM »
The brass valve replaced the original iron valves that were problematic after a few years.  I found them to work better. (the brass ones)
Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline daveismissing

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Re: Brake Proportioning Valve
« Reply #3 on: February 10 2017, 07:00:30 PM »
So I should change out my iron one?
-Drain plug by Earl Brown, custom oil pan by Rich's Auto

Online TexasT

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Re: Brake Proportioning Valve
« Reply #4 on: February 10 2017, 08:36:57 PM »
Mine was the original. Are you having the pedal do odd things ?
Mine was having a lot of travel, and long stopping distance as it was putting it all to the rear brakes.
That said I guess it wouldn't hurt.
Rich

"Goals without actions are just dreams."

Offline Steve Wood

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Re: Brake Proportioning Valve
« Reply #5 on: February 10 2017, 09:28:40 PM »
The iron ones would tend to not act right due to internal rust and leak after awhile...
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.


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