1960's P/S control valve

[Joe L.]

Re: 1960's P/S control valve

Joe,

Could it be that GM did not include the 581 gasket in the overhaul kit because they thought it was reusable.

Timothy-------


That could very well be. However, if that's what they thought, they were wrong.

[Harry S.]

Re: 1960's P/S control valve

I took the valve apart. Nothing has been cleaned yet except the ball stud and that needs to be replaced. It is rough not smooth.

Joe, I assume the spring on the right is the Corvette Spring?

[Jeffrey S.]

Re: 1960's P/S control valve

Harry,
Could you measure the 2, 12 point bolts (thread size and length) and post here? Also, is that a split lock washer on these? Thanks for your help.
Jeff

[Harry S.]

Re: 1960's P/S control valve

16 x 1", only threaded for 1/2 inch. Yes, lock washers. All black phosphate.

[Joe L.]

Re: 1960's P/S control valve

I took the valve apart. Nothing has been cleaned yet except the ball stud and that needs to be replaced. It is rough not smooth.

Joe, I assume the spring on the right is the Corvette Spring?

Harry------


Please measure the free length of both of the 2 coil springs.

[Harry S.]

Re: 1960's P/S control valve

Joe

Right = FL - .7625 OD - .4670
Left = FL - .5565 OD - .8770

[Joe L.]

Re: 1960's P/S control valve

Joe

Right = FL - .7625 OD - .4670
Left = FL - .5565 OD - .8770

Harry------


Yes, the spring on the right is the Corvette spring.

[Harry S.]

Re: 1960's P/S control valve

Harry------


Yes, the spring on the right is the Corvette spring.

That is what I figured the answer would be. I'll look for a rebuild kit that includes the stud ball and the two cups. When I take the replacement apart next spring I'll let you know what is in there.

Cheers.

[Jeffrey S.]

Re: 1960's P/S control valve

16 x 1", only threaded for 1/2 inch. Yes, lock washers. All black phosphate.

Harry,
Thanks for the response. I think you mean 3/8 x 16 x 1" right?
Jeff

[Harry S.]

Re: 1960's P/S control valve

Harry,
Thanks for the response. I think you mean 3/8 x 16 x 1" right?
Jeff

Yes, 3/8 is good.

[Jeffrey S.]

Re: 1960's P/S control valve

Harry,
Thanks again for your help!
Jeff

[Timothy B.]

Re: 1960's P/S control valve

Harry, FWIW I overhauled the valve on my 63 a few years ago and got the kit from corvette stainless steel brakes in Miami and had no leaks or problems. I can't remember the gasket Joe refers to so I must have reused the old part.

[Harry S.]

Re: 1960's P/S control valve

Tim, did the kit contain everything pictured? There is a few extra O-rings for the later version of valve.

[Ray K.]

Re: 1960's P/S control valve

Harry,
Is there any type of marking(s) on the 12 point bolt head? Can you post a couple of pictures of them?
Thanks.
Ray

[Harry S.]

Re: 1960's P/S control valve

Harry,
Is there any type of marking(s) on the 12 point bolt head? Can you post a couple of pictures of them?
Thanks.
Ray

No headmarks, the top of the bolt is concave. The valve is now packed up.