Can you still get a proportioning valve for a '69 from GM?

The service manual reports that they are not serviceable and should be thrown away. However, the resto catalogs sell rebuilt valves. In addition, there are a couple of places listed in Hemmings that will rebuild them. Has technology changed in 30 years, so that the valves came be rebuilt?

My pass. side front caliper froze up yesterday. The other caliper and rear drums are dragging, so I think the proportioning valve went bad.

Any help is appreciated.

When the service manual says they aren't serviceable, that means GM doesn't sell internal parts for them.
Rebuilders like Master Power can rebuild them, as they have the parts.
There are replacement valves available, they are usually made of brass.I don't know if GM has any replacement valves.
I don't think your proportioning valve is causing your troubles. I would make sure everything else is in good condition first.
David


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Check my web page for First Gen Camaro suspension info:
David's Motorsports page (http://ourworld.compuserve.com/homepages/David_Pozzi/)
First Gen Suspension Page (http://ourworld.compuserve.com/homepages/David_Pozzi/first_gen_suspension.htm)
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer

[This message has been edited by davidpozzi (edited 03-04-2001).]

Sounds like a blocked brake line, or caliper/wheel cylinder that's your biggest problem. I was told the 71 and later Camaro master cylinder has a proportioning valve built in so you can remove the stock one completely if you are not going for a total stock restoration. Also there are adjustable proportioning valves available to replace the stock valve.

Thanks guys. I got the car up on jack stands and all the wheels are hard to spin by hand. You can hear the pads engaing the rotor and shoes. The master cylinder fairly new. All my reference books are pointing toward the valve.

Ground Up and Rick's want $99 to rebuild it. One restoration place wants $150. A rebuilt one is $189-199. That one mile ride I had yesterday is sure going cost a lot. I might as well change the brake hoses, etc. and be done with it.



[This message has been edited by Silver69 (edited 03-04-2001).]

Hey guys, this is a little off topic, but I am about to put front discs on my 69 camaro and I was wondering if it is necessary to attach the proportioning valve to the frame? Could i place it in the engine compartment instead as long as it is lower than the master cylinder?

Also if it needs to be on the frame , where does it go exactly? I have looked in the Factory Assembly Manual and couldn't locate where it went.

Thanks for the help!

Steve

The prop valve is not built into the master cyl.
A straight proportioning valve can be placed almost anywhere, but on a firstgen using a combination type valve, I'd put it near the master cyl as it functions as a T for front and rear brake lines.
Be aware of movement of the subframe and allow a coil of brake tubing between the subframe and whatever valving is mounted to the firewall.
David

------------------
Check my web page for First Gen Camaro suspension info:
David's Motorsports page (http://ourworld.compuserve.com/homepages/David_Pozzi/)
First Gen Suspension Page (http://ourworld.compuserve.com/homepages/David_Pozzi/first_gen_suspension.htm)
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer

[This message has been edited by davidpozzi (edited 03-04-2001).]

The diagram of the valve location is in the L48 sheets of the factory assembly manual. In the L35 sheets is lists to assemble as in the RPO L48.