CRG Discussion Forum

Camaro Research Group Discussion => Restoration => Topic started by: onebad34 on June 22, 2008, 01:26:55 PM

Title: Pressure relief valve
Post by: onebad34 on June 22, 2008, 01:26:55 PM

I was at GM Nationals at Carlisle yesterday and noticed that the round Pressure relief valve under the Master cylinder was different on the 67 camaro's than the 68-69 camaro's. Is there a difference or is this a aftermarket issue.  In all the parts catalogs, they list only one valve and state for the 67-69 camaro's.  What is correct for the 67 camaro, big block, drum/disc car.  Does anyone have the correct one for sale?   thanks Pete

Title: Re: Pressure relief valve
Post by: JohnZ on June 22, 2008, 02:57:48 PM

The same part number metering/hold-off valve (3905525) was used on J52 power disc/drum brakes in '67, '68, and '69. I suspect any visual differences are a result of production vs. Service vs. the new reproduction valves.

Title: Re: Pressure relief valve
Post by: Pex68 on June 25, 2008, 08:18:05 PM

Had my car in concours and was told my Metering Valve was a 69.  Was told on 67-8's the housing was smaller & the nut is different.  Have to find my original now to compare!!!

Title: Re: Pressure relief valve
Post by: onebad34 on June 25, 2008, 08:46:15 PM

Thanks for the reply, I was sure there was a difference. I could visually tell the differernce,  Now, Does anyone have a housing that I can rebuild?  thanks in advance Pete

Title: Re: Pressure relief valve
Post by: Pex68 on June 25, 2008, 09:07:41 PM

No problem.  When I find my original I'll post some pic's but it may be a while!

Title: Re: Pressure relief valve
Post by: Pex68 on June 25, 2008, 09:13:23 PM

Hey Pete,

Looks like In-Line tube is repoping it.  If you get it let me know what you think.
http://cgi.ebay.com/ebaymotors/67-68-Camaro-Nova-Firebird-Disc-Brake-Hold-Off-Valve_W0QQcmdZViewItemQQcategoryZ34199QQihZ009QQitemZ190231735562QQrdZ1QQsspagenameZWDVW

Title: Re: Pressure relief valve
Post by: onebad34 on June 26, 2008, 12:23:51 AM

Hey thanks for the info.  I went on line and you can see the difference between the 67/68 part no. PR114, and the one listed for the 69, part no. PR 105,  I will be ordering one in the morning.  Thanks again and I will keep you posted.   Pete