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12-22-2008, 08:32 PM
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#1 |
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"the other guy"
Join Date: Oct 2008
Location: Olivehurst California 95961
Posts: 901
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porp valve question
how do i tell if my porp valve is bad? the PO stored the cab outside a couple years with no brake lines attached. it looks to have a little rust in there. that dam thing is 159 through LMC! does anyone have one for disc brakes? which ones will interchange? thanks guys
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God Said,"Building A 10 Second Import Is Like Coming Out Of The Closet, In The End Ur Still....."EXPLETIVE" 
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12-22-2008, 11:26 PM
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#2 |
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Future TOTM Winner
Join Date: Aug 2006
Location: Bulverde, TX
Posts: 2,692
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Re: porp valve question
I know this doesn't fully answer your question, but this diagram answered a lot of mine when I was rebuilding my brakes. Maybe it will help you some.
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72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces) 72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts 2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver Check it out www.lsdyno.com |
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12-22-2008, 11:41 PM
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#3 |
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Registered User
 
Join Date: Nov 2007
Location: South Tx
Posts: 1,083
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Re: porp valve question
~$100 will get you a new brass one from Inlinetube.
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12-26-2008, 11:26 AM
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Senior Member
Join Date: Jun 2001
Location: Shelbyville, KY
Posts: 3,261
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Re: porp valve question
Our trucks use a combination proportioning valve that has a piston which can slide front or back depending if one of the brake lines or wheel cylinders fail. To properly bleed the brakes, this piston needs to be held stationary. These valves are available from most auto parts stores. LMC price is a rip-off. Custom brake dealers for street rods have them in brass for about $65.--Do some searching before buying. Be sure to bench bleed the mastercylinder before installing. Huck
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