Need help! Proportioning Valve leaking!

StAnG89 · 10-11-2006

I got a 1989 LX Stang and the proportioning valve just recently started leaking. It is leaking at the front plug. I am trying to find an original, non-adjustable valve, or just the replacement plug for the original valve. If anyone has any ideas please let me know b/c I am going crazy trying to find one. Thanks in advance.

5.0ForLife · 10-11-2006

Pull the leaky plug. Wrap the thread in thread tape real good. And tighten the
Sh@t out of it. If that doesn't work go to a scrap yard and get a new valve.

StAnG89 · 10-31-2006

I tried removing the front plug, but it seems really stuck in there, I am still trying to get the factory original, does anyone know if other year mustang proportioning valves would work b/c I can't track down the original, or can anyone tell me about the adjustable proportioning valves? I have heard that they are hard to adjust to just a normal factory like break settings. Thanks in advance.

shakerhood · 10-31-2006

Just snag one from a junk yard.

5.0ForLife · 11-01-2006

When I bought my car I had No rear brakes. Found out it was the proportioning valve.
looked around at scrapyards. Found one for $10. '79-'93 are all basically
the same. Just make sure all the flare nuts are the same size.

That
cost me an extra trip out to the scrapyard. The flare nuts on my car and original
valve were all the same size, and the scrapyard valve had larger holes only in
the top, for larger flare nuts. I got the right valve, and my brakes have been mint
since. As far as getting them loose, use lots of penetrating fluid. And if they are stripped
a good pair of little vise-grips may be the only option. Be gentle and you'll be able to re-use
them. Put some anti-seize on the threads if you do.

systronic · 11-01-2006

check PPI, im pretty sure they have them (in the suspension/chassis section i believe)

http://performancepartsinc.com/

luniticlizard · 12-02-2006

Okay, I am having the same problem with my gf's 93 LX 2.3. It is leaking out of the hole in the front pulg. I got one from salvage yard... same thing. Could it be possible that TWO could be bad, or is there something else that is causing the leak? This is a dealer only item too and it is discontinued. I have to wait until Monday to get a replacement from the yard. Oh yeah, the dude at the yard said I should be safe with any 87-93 2.3 p-valve, the replacement was from a 88 vert and everything was idential.

shakerhood · 12-03-2006

It is probably the O Ring that is going bad on the Front Plug which would end up causing the leaks.

luniticlizard · 12-09-2006

Well I got another from the salvage yard and it looked in much better shape this time. I put it all back together and I ended up cross-threading one of the fittings. The part was jacked. I pulled out the guts and put them in the first one from the junk yard in hopes that would fix the problem. It's been a week and no leaks.