'treezy

Proportioning Valve. What is it?

The proportioning valve regulates the distribution of fluid pressure to the front and rear brakes to prevent skidding in the event of rear wheel lock and to obtain a higher brake efficiency.

What's my question(s)?

1.)Is there a difference between a 1997 and a 2000 proportioning valve (i.e. rear drums vs. rear discs)??

2.)Where is this located? and how to uninstall?

QUESTION 1:
I ask because to my understanding drum brake require less flow to operate when compared to disc brakes. So, logically...if you were to swap the drum brakes to disc brakes (which I have done)...you would require more flow to the rear than normal.

The proportioning valve does not know I changed the rear brakes from drum to disc, do I need to tell it that by swapping in a proportioning valve from an all-around disc-brake tiburon?

I would think so, I guess one way to find out would be to compare part numbers. I know the master cylinders on a 2000 vs. 1997 are the same, but I have not checked the proportioning valve part numbers....

QUESTION2:

Hyundai Motor America/Webtech clearly states:

'Do not disassemble the proportioning valve.'

and provides no removel or installation instructions...

The only installation instructions provided are which brake lines go where:
______________________________
PROPORTIONING VALVE INSTALLATION
Install the brake lines according to the illustration.



Tighten the flare nuts and bleed the system.
TORQUE SPECIFICATION
Brake tube flare nut 13-17 Nm130-170 kg·cm9-12 lb·ft
Proportioning valve mounting nut 8-12 Nm80-120 kg·cm5.8-8.7 lb·ft
_______________________________


okay. that's fine and dandy and all...but where the hell is it? and how to I get it out and replace my 1997 DRUM brake one with a 1998+ DISC brake one....

thanks for any help.

01tibby

the proportioning valve is right below the master cylinder, attached to the firewall.

'treezy

I freakin knew it. Thanks man. fing02.gif

supercow

do you want a part #? I've got one out in my garage I'm going to put on my tib since the one on my car's all screwed up.

btw, i took mine apart to find out that it was seized up. thats the reason for the replacement.

Zman

So... you have to change that no matter what if you do the rear brake convertion to discs right?

Guys, when you do the convertion, do you only change the rear suspension arm with the discs and calipers, or do you install the ABS module as well? I ask because I am interested in doing this to my wife's Elantra (my Tib already has factory discs+ABS) and I didn't know if you can/have-to install the ABS as well.

'treezy

I have done the rear brake swap and kept the old proportioning valve on...no problems. The car brakes fine (I'm guessing the difference is not noticeable...rather in the efficiency of the rear discs with the correct proportioning valve.

I got disc brakes from a non-ABS car. I don't know if you can use discs from an ABS car...I wouldn't think so.

hijacked.gif mad.gif

LarryMcFly

To solve any potential problems, install an adjustable, lever type, proportionning valve. You can get one for about 50$. Allows you to adjust brake bias front/rear....you can even change settings in between turns lol.

01tibby

they are quite sweet. i will be getting one when i start peicing together a wilwood kti for myself.

faithofadragon

you can uses the diks from a abws car ya just gotta removse the sensor

'treezy

where do I find one for 50 dollars? thanks for the suggestion. I never knew.