how do i remove check valve in my master cylinder - Team Camaro Tech
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post #1 of 5 (permalink) Old Nov 7th, 09, 04:24 PM Thread Starter
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Erick
 
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Location: quebec
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how do i remove check valve in my master cylinder

I just read from the untold secrets book, when installing Jl8 brake system on a 69 camaro to remove the check valve in the master cylinder.

Where is the check valve and how do i remove it.

thanks
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post #2 of 5 (permalink) Old Nov 7th, 09, 05:21 PM
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mark
 
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Re: how do i remove check valve in my master cylinder

its under the brass seat on the rear line outlet . i have taped the hole for a small screw then put a washer over the port put the screw in then turn until it pulls out .
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post #3 of 5 (permalink) Old Nov 7th, 09, 06:36 PM
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T
 
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Re: how do i remove check valve in my master cylinder

Yeah, what Mark said
There are some great pics/diagrams here that show the brass seat and the removal procedure:
http://www.camaros.org/forum/index.p...19259#msg19259
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post #4 of 5 (permalink) Old Nov 7th, 09, 07:22 PM Thread Starter
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Erick
 
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Re: how do i remove check valve in my master cylinder

do i have to remove both check valves ( front and rear) or do i just remove the back for Jl8
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post #5 of 5 (permalink) Old Nov 7th, 09, 08:18 PM
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Re: how do i remove check valve in my master cylinder

The check valve (actually a ~10psi residual pressure valve) is designed for drum brake systems. If you're going to run disc/disc, you don't want an RPV in either leg of the system.

BUT -- depending on what master cylinder you're starting with, there may not be an RPV in the from (or rear) outlets. Stock disc/drum master should have an RPV in the rear outlet only. Drum/drum master would have them in both ports. BUT, a lot of the master cyl rebuilders don't bother re-installing the RPV's, so a rebuilt "disc/drum" or "drum/drum" master may not have any RPV's at all.

Find an apropriately sized drill bit and use the back (blunt) end of the bit to probe the outlets -- you should be able to feel the RPV's if they're in there. Remove any RPV's from the m/c if you'r going over to disc/disc.
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