PS control valve rebuild
Thread Starter
Racer
Joined: Jan 2000
Posts: 305
Likes: 0
From: Eau Claire, WI
PS control valve rebuild
Has anyone rebuilt their PS control valve? Mine is leaking and I want to repair it over the winter. The kit is about $25 so it's a cheap fix, but I've never done it before and would like to know what I'm in for before I get started. From what I see, it so doesn't look too bad. Usually when it doesn't look bad it ends up a headache. Thanks for the input.
Le Mans Master
Joined: Apr 1999
Posts: 6,134
Likes: 46
From: Raleigh North Carolina
Re: PS control valve rebuild (bfrance)
In my opinion, it's an easy job. But... I rebuilt my first engine at 14, worked as a mechanic at a service station and at a large automotive service chain, and owned/operated my own 7 bay machine/repair shop. So- it depends on your manual dexterity. There are two adjustments- internal & external that you have to be aware of.
Melting Slicks
Joined: Dec 2000
Posts: 2,635
Likes: 0
From: Union Ontario
Re: PS control valve rebuild (Tom454)
Very easy job. Did it last month. Have fun!
What are the two adjustments? the centering of the spool, thats the only hard one. The ball stud adjusment isn't really that critical.
What are the two adjustments? the centering of the spool, thats the only hard one. The ball stud adjusment isn't really that critical.
Le Mans Master
Joined: Apr 1999
Posts: 6,134
Likes: 46
From: Raleigh North Carolina
Re: PS control valve rebuild (MikeC)
I disagree with ya on that one.. the ball stud adjustment is very critical....
This is the reason most "rebuilt" units get sent back to the factory.
The steel shim gasket between the halves is *normally* a "one time" deal... so you need to get it right the first time.
A very slight looseness of the ball stud will cause a very large amount of slop in the steering. There is no difference between a loose ball stud and shot tie rod ends... the steering will slop around in either case.
I adjust these to -0- clearance and make sure the ball & socket is well greased during re-assembly.
No flame intended... just based on my experience.... been rebuilding these since 1975.
This is the reason most "rebuilt" units get sent back to the factory.
The steel shim gasket between the halves is *normally* a "one time" deal... so you need to get it right the first time.
A very slight looseness of the ball stud will cause a very large amount of slop in the steering. There is no difference between a loose ball stud and shot tie rod ends... the steering will slop around in either case.
I adjust these to -0- clearance and make sure the ball & socket is well greased during re-assembly.
No flame intended... just based on my experience.... been rebuilding these since 1975.
Melting Slicks
Joined: Dec 2000
Posts: 2,635
Likes: 0
From: Union Ontario
Re: PS control valve rebuild (Tom454)
I don't mean to be rude but I would never leave a ball stud loose, you are just waiting for disaster. Thats why I don't think it is a critical adjustment.
Le Mans Master
Joined: Apr 1999
Posts: 6,134
Likes: 46
From: Raleigh North Carolina
Re: PS control valve rebuild (MikeC)
MikeC... what we have here is a failure to communicate... we agree that the ball stud must be adjusted, but we don't agree on the use of the term critical. Let me define my use...
It is critical (necessary) that the ball stud be adjusted correctly for proper operation of the steering linkage.
Hope that is better.
And.. yes... people (including the rebuilders) do adjust the ball stud improperly... I have seen this many times on rebuilt units right out of the box. I have also seen and corrected mal-adjusted ball-studs done by Saturday mechanics. You and I would not do this, but other people, who are unaware that it is, in fact, adjustable, just slap the units back together, not paying attention to the ball stud adjustment. What we take for granted as common sense, is not always obvious to other people.
It is critical (necessary) that the ball stud be adjusted correctly for proper operation of the steering linkage.
Hope that is better.
And.. yes... people (including the rebuilders) do adjust the ball stud improperly... I have seen this many times on rebuilt units right out of the box. I have also seen and corrected mal-adjusted ball-studs done by Saturday mechanics. You and I would not do this, but other people, who are unaware that it is, in fact, adjustable, just slap the units back together, not paying attention to the ball stud adjustment. What we take for granted as common sense, is not always obvious to other people.
Pro
Joined: Dec 2000
Posts: 560
Likes: 0
From: Camino CA
Re: PS control valve rebuild (bfrance)
Here are the step by step instructions with pictures
http://zip-corvette.com/controlvalve.htm
http://zip-corvette.com/controlvalve.htm
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Le Mans Master
Joined: Jul 2000
Posts: 6,001
Likes: 112
From: Saginaw Michigan
Re: PS control valve rebuild (bfrance)
The Zip Products information is quite complete as to rebuilding the control valve. You might also take a look at a paper that I posted at Terry Rudy's websight for just a bit more information. Go to: http://corvettefaq.com and look under Suspension and Steering. Pull up Control Valve Replace and Balance Instructions.
Thread Starter
Racer
Joined: Jan 2000
Posts: 305
Likes: 0
From: Eau Claire, WI
Re: PS control valve rebuild (Jim Shea)
WOW, great sites. This is just the info I need. I've been doing mechanic work for ----- well let's say a while. With this info, I'm sure I can get it right. Thanks to all who responded.
Instructor
Joined: Dec 2000
Posts: 108
Likes: 0
From: Derbyshire,England
Re: PS control valve rebuild (bfrance)
Hi
just picked this post up,sorry i'm a bit late.
I didn't know that you could adjust the play in the ball stud. This is the only part of my steering that has any play in it. The ball stud moves about 1/16-1/8 and the PS valve is not all that old. Can anyone tell me how to adjust play in the ball stud ??.
Thanks
David :seeya
just picked this post up,sorry i'm a bit late.
I didn't know that you could adjust the play in the ball stud. This is the only part of my steering that has any play in it. The ball stud moves about 1/16-1/8 and the PS valve is not all that old. Can anyone tell me how to adjust play in the ball stud ??.
Thanks
David :seeya
Le Mans Master
Joined: Apr 1999
Posts: 6,134
Likes: 46
From: Raleigh North Carolina
Re: PS control valve rebuild (ukvette72)
You have to disassemble the valve to adjust the ball stud.
This usually means you will need a new metal shim gasket that goes between the two halves.
Might as well buy a rebuild kit before you start.
I haven't looked at the links above, l but I assume they have step-by-step instructions.
This usually means you will need a new metal shim gasket that goes between the two halves.
Might as well buy a rebuild kit before you start.
I haven't looked at the links above, l but I assume they have step-by-step instructions.
