Author Topic: Pressure relief valve  (Read 5484 times)

onebad34

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Pressure relief valve
« 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

JohnZ

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Re: Pressure relief valve
« Reply #1 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.
'69 Z/28
Fathom Green
CRG

Pex68

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Re: Pressure relief valve
« Reply #2 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!!!
Chris P
1968 Sequoia Green SS 396/325 M20

onebad34

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Re: Pressure relief valve
« Reply #3 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

Pex68

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Re: Pressure relief valve
« Reply #4 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!
Chris P
1968 Sequoia Green SS 396/325 M20

Pex68

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Re: Pressure relief valve
« Reply #5 on: June 25, 2008, 09:13:23 PM »
Chris P
1968 Sequoia Green SS 396/325 M20

onebad34

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Re: Pressure relief valve
« Reply #6 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

 

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