proportioning valve
Thread Starter
Le Mans Master
Joined: Jun 2019
Posts: 5,476
Likes: 2,186
From: Loveland
proportioning valve
I'm replacing the MC and proportioning valve on a 68. The 68 proportioning valve has 2 inputs, 2 outputs. One output for the rear, one for the front. The new valve has 2 seperate ports for the front, and still just one for the rears. Should I plug one of the ports for the front and just use the existing line, or make 2 seperate lines for the front left, front right?
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
Is is designed to have separate outlet fittings for left and right in front. That is to eliminate a single crossing line for the full width. Not sure whether that is for safety in some regard or strictly for cost savings. Maybe both....
Is my vette stock?? HAHA
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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cant you find the proper proportioning valve? heres a 68 https://www.paragoncorvette.com/p-35...ing-valve.aspx apparently its another 67-68 part like the front spindles and bearings
The 69 vavle looks like the 68 one except for the mounting bracket
https://keenparts.com/corvette-parts...partnum=500452
The 69 vavle looks like the 68 one except for the mounting bracket
https://keenparts.com/corvette-parts...partnum=500452
Thread Starter
Le Mans Master
Joined: Jun 2019
Posts: 5,476
Likes: 2,186
From: Loveland
cant you find the proper proportioning valve? heres a 68 https://www.paragoncorvette.com/p-35...ing-valve.aspx apparently its another 67-68 part like the front spindles and bearings
The 69 vavle looks like the 68 one except for the mounting bracket
https://keenparts.com/corvette-parts...partnum=500452
The 69 vavle looks like the 68 one except for the mounting bracket
https://keenparts.com/corvette-parts...partnum=500452
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
This valve was a GM "corporate" design and was used on a multitude of platforms. Depending on where the valve got mounted, the 2nd angled front outlet port may not be used. When in OE production, the port just didn't get machined, but to make it "universal", the aftermarket just plugs it on those applications that don't use it.
Thread Starter
Le Mans Master
Joined: Jun 2019
Posts: 5,476
Likes: 2,186
From: Loveland
This valve was a GM "corporate" design and was used on a multitude of platforms. Depending on where the valve got mounted, the 2nd angled front outlet port may not be used. When in OE production, the port just didn't get machined, but to make it "universal", the aftermarket just plugs it on those applications that don't use it.
Last edited by kodpkd; Jul 16, 2019 at 11:29 AM.
