Bad proportioning valve?

[68 Sport Satellite]

http://[URL]https://techtalk.mpbrakes.com/proportioning-valve-bleeding-tool

[/URL]
Try this link

thanks, I had seen that, but they don't say if it's for GM or mopar. My repro brass distribution block is actually from that supplier (MP brakes) so I'll message them.

 

[davek]

thanks, I had seen that, but they don't say if it's for GM or mopar. My repro brass distribution block is actually from that supplier (MP brakes) so I'll message them.

did MP message you back?

 

[68 Sport Satellite]

did MP message you back?

Yes, they said the dist block and the tool are both GM based and will work together and they did.
In the end, I found I had a leaky distribution block (brass seats weren't sealing completely). So I
looked and looked and so many new distribution blocks have similar issues. I finally found one on
Summit that had great reviews, installed it and FINALLY! No more leak, great pedal feel, can lock up the brakes now.

This is the one I installed.
Right Stuff Detailing PV71 Right Stuff Detailing Brake Proportioning Valves and Blocks | Summit Racing

 

[68 Sport Satellite]

The centering tool does not block brake fluid flow. It only keeps the metering valve from moving.

So you just screw it in and do your normal bleeding? And that will allow more fluid to get to the rears?

 

[davek]

Yes, they said the dist block and the tool are both GM based and will work together and they did.
In the end, I found I had a leaky distribution block (brass seats weren't sealing completely). So I
looked and looked and so many new distribution blocks have similar issues. I finally found one on
Summit that had great reviews, installed it and FINALLY! No more leak, great pedal feel, can lock up the brakes now.

This is the one I installed.
Right Stuff Detailing PV71 Right Stuff Detailing Brake Proportioning Valves and Blocks | Summit Racing

were you able to use your original brake lines?

 

[68 Sport Satellite]

were you able to use your original brake lines?

Not sure. When I first installed the leaking brass block, I had the mechanic bend new lines to fit. It was so long ago, I don't know if they were the same size.