PS Control Valve Rebuild
Thread Starter
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
PS Control Valve Rebuild
Well my first try at rebuilding a PS Control Valve didn`t go so well. Maybe someone can help me with what I did wrong. I filled the system and started the car and the car turned to the right. No biggie adjust the balancer. Start the car again and this time fluid comes squirting out around the rubber boot. THIS IS A PROBLEM. What did I do wrong. And should I just pony up the bucks and just buy a new or rebuild again. I don`t really want to rebuild again but I will if it is possible.
Burning Brakes
Joined: Feb 1999
Posts: 951
Likes: 0
Re: PS Control Valve Rebuild (Eddie 96)
IMHO is not worth rebuilding the control valve. Replace with a new one and you won't have any trouble for many years. Check the shaft on the ram cylinder. If there are any burs on it replae it also. I would also replace all the hoses. :chevy
Intermediate
Joined: Oct 2002
Posts: 39
Likes: 0
From: Geneva OH
Re: PS Control Valve Rebuild (Steve Grodin)
Hello,
i just bought a 79 and the valve and the pump was leaking fluid all over so i took it off and my dad had a new one that he couldnt use on this 67(not original #'s) so i put it on my car. you can send in your valve to corvette central and they will send you a new one they are in need of cores :thumbs:
i just bought a 79 and the valve and the pump was leaking fluid all over so i took it off and my dad had a new one that he couldnt use on this 67(not original #'s) so i put it on my car. you can send in your valve to corvette central and they will send you a new one they are in need of cores :thumbs:
Melting Slicks
Joined: Feb 1999
Posts: 2,473
Likes: 10
From: New Paltz, New York USA
Re: PS Control Valve Rebuild (Eddie 96)
Eddie 96,
Hi there, I had the same problem with my control valve, rebuilt it and it leaked worse that before I rebuilt it. I went to Auto Zone and bought a rebuilt one for $49.95 plus my old valve. Its been on the vette for a little over 3 years now and no problems at all. Plus, its gauranteed for life. I know that most of the people on this forum don't like Auto Zone, but I have bought lots of things from them and never had any problems. :steering:
Hi there, I had the same problem with my control valve, rebuilt it and it leaked worse that before I rebuilt it. I went to Auto Zone and bought a rebuilt one for $49.95 plus my old valve. Its been on the vette for a little over 3 years now and no problems at all. Plus, its gauranteed for life. I know that most of the people on this forum don't like Auto Zone, but I have bought lots of things from them and never had any problems. :steering:
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
Re: PS Control Valve Rebuild (Eddie 96)
I did my 78 a couple of years ago and it went without a hitch. Now, I did use a service manual and followed the directions. It must be balanced and you did not mention that this was done. The assembly for the rebuild was straight forward...I may have even did a bench bleed...don't recall.
I would say though...this does require a service manual if you've not done before...but it's not impossible. you still have to balance even if you purchase a rebuild and install.
If fluid squirted out the boot...you didn't get it sealed properly. Check your hoses and be patient follow your tracks.
I would say though...this does require a service manual if you've not done before...but it's not impossible. you still have to balance even if you purchase a rebuild and install.
If fluid squirted out the boot...you didn't get it sealed properly. Check your hoses and be patient follow your tracks.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Re: PS Control Valve Rebuild (hunt4cleanair)
I did my 78 a couple of years ago and it went without a hitch. Now, I did use a service manual and followed the directions. It must be balanced and you did not mention that this was done. The assembly for the rebuild was straight forward...I may have even did a bench bleed...don't recall.
I would say though...this does require a service manual if you've not done before...but it's not impossible. you still have to balance even if you purchase a rebuild and install.
If fluid squirted out the boot...you didn't get it sealed properly. Check your hoses and be patient follow your tracks.
I would say though...this does require a service manual if you've not done before...but it's not impossible. you still have to balance even if you purchase a rebuild and install.
If fluid squirted out the boot...you didn't get it sealed properly. Check your hoses and be patient follow your tracks.
Le Mans Master
Joined: Jul 2000
Posts: 6,001
Likes: 112
From: Saginaw Michigan
Re: PS Control Valve Rebuild (Eddie 96)
The ball stud area should not have any power steering fluid in that cavity. I think that some of the rebuilding kits do not do an adequate job of describing exactly how the new lip seals and parts go together.
I made a special drawing with blowups to show just how the seals are supposed to be reassembled. You can go to http://www.corvettefaq.com and look under Steering. Download Control Valve Sliding Seals Pic #3. There are also scans from the Chevrolet Overhaul Manual Control Valve Overhauls Instructions #1 through #5.
Merry Christmas,
Jim Shea
I made a special drawing with blowups to show just how the seals are supposed to be reassembled. You can go to http://www.corvettefaq.com and look under Steering. Download Control Valve Sliding Seals Pic #3. There are also scans from the Chevrolet Overhaul Manual Control Valve Overhauls Instructions #1 through #5.
Merry Christmas,
Jim Shea
Thread Starter
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Re: PS Control Valve Rebuild (Jim Shea)
Hey thanks for the tips guys. Jim I printed this out and am gonna go out and see what I messed up on before it gets too cold outside.
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Thread Starter
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Re: PS Control Valve Rebuild (Eddie 96)
Jim I sent an IM to you. This is what I found so far.
I think I found what was wrong with my control valve. One was the spring thrust washer somehow got fouled up and installed incorrectly between the coils. Got this corrected. Don`t know how I did it but I did. Ok, now I am looking at the exploded view of the control valve and I see an o-ring part #18. Mine didn`t have this and do I need it. I have read the Zip rebuild several times and it doesnt mention this o-ring that I can tell. What are the dimensions on this o-ring if you know. I have quite an assortment of o-rings at my disposal. If you let me know I can give this another try. Thanks.
Eddie.
[Modified by Eddie 96, 6:13 PM 12/22/2002]
[Modified by Eddie 96, 6:13 PM 12/22/2002]
I think I found what was wrong with my control valve. One was the spring thrust washer somehow got fouled up and installed incorrectly between the coils. Got this corrected. Don`t know how I did it but I did. Ok, now I am looking at the exploded view of the control valve and I see an o-ring part #18. Mine didn`t have this and do I need it. I have read the Zip rebuild several times and it doesnt mention this o-ring that I can tell. What are the dimensions on this o-ring if you know. I have quite an assortment of o-rings at my disposal. If you let me know I can give this another try. Thanks.
Eddie.
[Modified by Eddie 96, 6:13 PM 12/22/2002]
[Modified by Eddie 96, 6:13 PM 12/22/2002]
Le Mans Master
Joined: Jul 2000
Posts: 6,001
Likes: 112
From: Saginaw Michigan
Re: PS Control Valve Rebuild (Eddie 96)
Eddie,
I answered your instant message but I will add some info here as well. First of all, General Motors has a nut and seal kit still available for the control valve. It is part number 5687997 and any GM dealer should be able to order it for you. It lists for $15.71 and includes the torque prevailing nut to adjust the valve.
As I mentioned in the answer to your instant message. I scaled some reduced drawing in order to try and determine the size of the o-ring #18 that you say was missing. Gross calculations would say that it is 1.18 inch inside diameter with something between 0.070 and 0.090 cross section.
BTW, o-ring seal #18 should fit right into a cavity that is machined into the face of the valve housing.
If at all possible, use the GM kit because I know those seals should be the correct size and another thing, the correct material.
Merry Christmas,
Jim Shea
I answered your instant message but I will add some info here as well. First of all, General Motors has a nut and seal kit still available for the control valve. It is part number 5687997 and any GM dealer should be able to order it for you. It lists for $15.71 and includes the torque prevailing nut to adjust the valve.
As I mentioned in the answer to your instant message. I scaled some reduced drawing in order to try and determine the size of the o-ring #18 that you say was missing. Gross calculations would say that it is 1.18 inch inside diameter with something between 0.070 and 0.090 cross section.
BTW, o-ring seal #18 should fit right into a cavity that is machined into the face of the valve housing.
If at all possible, use the GM kit because I know those seals should be the correct size and another thing, the correct material.
Merry Christmas,
Jim Shea
