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10-26-2024, 03:46 PM
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#1 |
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Senior Member
 
Join Date: Apr 2006
Location: Yuba City, Ca
Posts: 1,955
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Proportion Valve leak
The valve is leaking out of the small rubber seal on the rear outlet. This a new valve. Anyone know what would cause this and what this is for? The round seal right under the mounting bolt.
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Kirk 72 Blazer CST 4wd highlander |
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10-26-2024, 05:50 PM
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#2 |
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Senior Member
Join Date: Mar 2015
Location: washington
Posts: 2,295
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Re: Proportion Valve leak
I went through three of them before I got one that didn't leak.
All are pretty much from the same company in China. |
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10-26-2024, 07:08 PM
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#3 |
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Senior Member
Join Date: Apr 2006
Location: Yuba City, Ca
Posts: 1,955
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Re: Proportion Valve leak
Weird. Might have to replace it.
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Kirk 72 Blazer CST 4wd highlander |
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10-27-2024, 07:20 AM
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#4 |
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Senior Member
Join Date: Feb 2022
Location: Ca
Posts: 631
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Re: Proportion Valve leak
I will second Accelo's comment. Find the correct PV on Amazon or other easy to return site and rotate till you get a good one. The expensive ones are just marked up. Not better.
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10-28-2024, 10:11 PM
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#5 |
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Senior Member
Join Date: Apr 2006
Location: Yuba City, Ca
Posts: 1,955
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Re: Proportion Valve leak
Is there a U.S. made source? I was thinking of swapping to Wilwood for the valve but they seem to only have disc/drum for this style. I need 4 wheel disc.
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Kirk 72 Blazer CST 4wd highlander |
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10-28-2024, 10:48 PM
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#6 | |
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Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,842
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Re: Proportion Valve leak
Quote:
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10-29-2024, 01:03 AM
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#7 |
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Registered User
Join Date: Jun 2010
Location: San Diego Co.
Posts: 1,179
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Re: Proportion Valve leak
I got an all brass disc/drum valve from ABS in Orange, CA and it was good on the first go...
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1972 Chevy C-10, SWB, Fleet, 350/350, PS, PB, HEI, mostly stock, Survivor. 
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10-29-2024, 09:44 PM
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#8 |
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Senior Member
Join Date: Jul 2000
Location: North Texas
Posts: 3,597
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Re: Proportion Valve leak
I got one from Inline Tube and it has worked well for over a year. But it may be from the same Chinese source as all the others.
Still have my original 71/72 valve and may send it to a re-builder.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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