Is my brake porportioning valve bad

ken robinson · 07-13-2010, 03:49 PM

Has my 67 camaro brake porportioning valve gone bad ? All of the 4 drum brakes work and hold strong and release fine .The main problem is with line lock it just can't lock down front brakes . Put new hurst line lock in end of last year , just due to the old hurst line loc soleniod started to stick/died . It just seams like it holds at half the pressure , compaired to if you just push on the pedal and try to turn the wheels . The line lock is get full 12vdc . All line connected wright in and out . Its the only thing left . Anybody run in to this ? Ken R.

Eric Merryfield · 07-13-2010, 03:59 PM

Quote:

Originally Posted by ken robinson

Has my 67 camaro brake porportioning valve gone bad ? All of the 4 drum brakes work and hold strong and release fine .The main problem is with line lock it just can't lock down front brakes . Put new hurst line lock in end of last year , just due to the old hurst line loc soleniod started to stick/died . It just seams like it holds at half the pressure , compaired to if you just push on the pedal and try to turn the wheels . The line lock is get full 12vdc . All line connected wright in and out . Its the only thing left . Anybody run in to this ? Ken R.

On my 70 challenger its pretty similar if I don't pump the living crap out of the brakes first. Much more than the other cars(dakota and challenger09). I think you may have solved a nagging problem for me!

Eric

ken robinson · 07-13-2010, 06:18 PM

Ya thats what I've been doing just to get by . But it can push you wright out of the burn out and miss putting enought heat in the slicks . I dont think my cars got a porportion valve , I think its just a pressure switch that lights the dash light .

Tony Curcio · 07-13-2010, 06:38 PM

Your last comment is correct- drums on all four won't need a proportioning valve. Try adjusting the shoes to the point they start to drag.

FED 387 · 07-13-2010, 09:17 PM

-try adjusting shoes til they start to drag ---then when you get into the water box pump the brake pedal a few times til it starts to get hard---you'll feel it in your foot--- then with the pedal still on the brake pedal set the line loc ---then start your burn out see if this helps--worked on my 67 camaro with drum brakes--Comp

Billy Nees · 07-14-2010, 06:09 AM

Ken, have you put new lining on it lately? Did you have the new lining re-arched to the drums?

njk53 · 07-14-2010, 06:10 PM

Billy Nees might be onto something. We had the same problem that drove us crazy. We put on new brake pads and new rotors. Turned out that we didn't have the above broken in properly.

07-13-2010, 03:49 PM	#1
ken robinson Member Join Date: Dec 2001 Location: tomsriver nj Posts: 477 Likes: 74 Liked 213 Times in 85 Posts	Is my brake porportioning valve bad Has my 67 camaro brake porportioning valve gone bad ? All of the 4 drum brakes work and hold strong and release fine .The main problem is with line lock it just can't lock down front brakes . Put new hurst line lock in end of last year , just due to the old hurst line loc soleniod started to stick/died . It just seams like it holds at half the pressure , compaired to if you just push on the pedal and try to turn the wheels . The line lock is get full 12vdc . All line connected wright in and out . Its the only thing left . Anybody run in to this ? Ken R.

07-13-2010, 06:18 PM	#3
ken robinson Member Join Date: Dec 2001 Location: tomsriver nj Posts: 477 Likes: 74 Liked 213 Times in 85 Posts	Re: Is my brake porportioning valve bad Ya thats what I've been doing just to get by . But it can push you wright out of the burn out and miss putting enought heat in the slicks . I dont think my cars got a porportion valve , I think its just a pressure switch that lights the dash light .

07-13-2010, 06:38 PM	#4
Tony Curcio Member Join Date: Mar 2002 Location: West Chester, PA Posts: 271 Likes: 1 Liked 4 Times in 1 Post	Re: Is my brake porportioning valve bad Your last comment is correct- drums on all four won't need a proportioning valve. Try adjusting the shoes to the point they start to drag. __________________ Tony Curcio 1860 STK

07-13-2010, 09:17 PM	#5
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,416 Likes: 521 Liked 330 Times in 178 Posts	Re: Is my brake porportioning valve bad -try adjusting shoes til they start to drag ---then when you get into the water box pump the brake pedal a few times til it starts to get hard---you'll feel it in your foot--- then with the pedal still on the brake pedal set the line loc ---then start your burn out see if this helps--worked on my 67 camaro with drum brakes--Comp

07-14-2010, 06:09 AM	#6
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,485 Likes: 3,587 Liked 7,682 Times in 1,730 Posts	Re: Is my brake porportioning valve bad Ken, have you put new lining on it lately? Did you have the new lining re-arched to the drums? __________________ Billy Nees 1188 STK, SS I'm not spending 100K to win 2K

07-14-2010, 06:10 PM	#7
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	Re: Is my brake porportioning valve bad Billy Nees might be onto something. We had the same problem that drove us crazy. We put on new brake pads and new rotors. Turned out that we didn't have the above broken in properly. __________________ Nelson Kowal Stock 345