Round hold off valve serviceable? - Team Camaro Tech
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post #1 of 4 (permalink) Old Sep 17th, 10, 06:27 AM Thread Starter
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Join Date: Dec 2003
Location: Eastern Canada
Posts: 99
Round hold off valve serviceable?

Hello, just starting to put my 68 back together. I am switching from front drums to front discs. While cleaning up some of the parts, I removed the large end nut from the "hold off valve" in order to clean and see if it was rusted or stuck. I have never had one of these apart and not sure how it works. Rubber disc looked ok but did not remove the rest of the valving inside. Can anyone shed some light on servicing this valve or is it usually not required?
Also, switched to a 69 disc setup (Rotors, calibers etc...). I am using a 69 master cylinder. I am hoping that the hold off valve and steel spliter block are the same on the 68's and 69's. There was no proportioning valve on the rear line on the frame when I bought the car.
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post #2 of 4 (permalink) Old Sep 17th, 10, 11:43 AM
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Join Date: Nov 2002
Location: Vancouver, USA
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Re: Round hold off valve serviceable?

Pretty good discussion here with lots of good pictures. Also called "metering valve" if you want to search further.

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post #3 of 4 (permalink) Old Sep 17th, 10, 12:00 PM
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Join Date: Nov 2003
Location: OH
Posts: 918
Re: Round hold off valve serviceable?

Keeps front wheels from locking up at low pressure , like if you were on ice or snow, and applied light foot pressure to slow down. I think the pressure valve under your driverside was for convertables or BB cars? I would put it back together and try it. So guys don't even use it. Mine works fine. No service parts that i no are available. Just buy a new one if needed.
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post #4 of 4 (permalink) Old Sep 17th, 10, 02:59 PM
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Re: Round hold off valve serviceable?

Numerous threads on the subject at CRG and here. It's all in this one and others:
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