1963 PCV valve

[Timothy B.]

I have a service replacement PCV valve CV590C for my 63 and am looking for a good original. I read they are black in color so it's different than this later valve.

I also have a stanadyne 100 valve that has a Ford part# C4TE-6A666-B and it looks exactly like the pics I have of the original AC 590. I purchased this valve for the car years ago and am wondering if anyone can tell me about this brand/valve. This Stanadyne valve looks like it's made twice as good as the AC replacement 590C.

Thanks for any help, Tim

[David L.]

Re: 1963 PCV valve

Original 1963 PCV valves (stamped CV 590, GM part # 5649689, Gr. 1.745) are really hard to find. I had a few of them back in the 1980's. They are "machined steel" with a black finish (maybe black oxide). They were replaced with the CV-590C PCV valve. "Early" CV-590C PCV valves were also "machined steel" with a black finish just like the CV-590 PCV valve but most CV-590C PCV valves made were "stamped steel" with a shiny finish. Below is a picture of the "early" solid steel CV-590C PCV valve on the left and the very common stamped steel CV-590C PCV valve on the right.

I have found the CV-590C PCV values on 1964-1967 Chevrolets w/283 engines in the junk yards back in the 1980's.

[Timothy B.]

Re: 1963 PCV valve

Thanks David,

The 590C valve I have looks like the one on the right. I wish someone would post a picture of a original 590 so I know what to look for.

The stanadyne valve looks like the picture someone posted a while back of a PCV for 1962.

[David L.]

Re: 1963 PCV valve

I think the CV590 PVC valve looks like the "early" CV590C PVC valve as shown in my picture, left side. I sold my original CV590 PVC valves about 20 years ago.

[John D.]

Re: 1963 PCV valve

When I restore a customers 63 FI and it has an original 590 on I really try and save it. So often the insides are very rusty. You are taking a chance using an old POC original as you may end up getting oil in the plenum etc.

LI makes a nice correct looking repro. JD

[Timothy B.]

Re: 1963 PCV valve

Thanks John, I will check them out.

[Timothy B.]

Re: 1963 PCV valve

Here are pics of the service PCV valve and this Stanadyne valve I purchased many years ago. There is a ford part # on this valve as stated above. I don't know if this perticular valve covers many applications. It's made very well and seems heavier than the service valve.

[John D.]

Re: 1963 PCV valve

Tim, Joe Lucia put up a post a week or two ago of a 62 CA style PCV valve-super rare one and it sure did look like your Stanadyne. Maybe it was one but I doubt it. Same configuration though.
Meanwhile Tim that's a heavy duty PCV you got there. I bet it would help keep oil out of the plenum on the old midyears.
You got to be careful with the blackened PCV's guys as a lot of them seem to be causing nice vacuum leak.
Jorjorian was telling me his thoughts on them. JD

[John D.]

Re: 1963 PCV valve

I think the CV590 PVC valve looks like the "early" CV590C PVC valve as shown in my picture, left side. I sold my original CV590 PVC valves about 20 years ago.

David, This morning I am working on a customers 63 FI and compared his original 590 PCV to your photo.
I may be wrong but your early 590 PCV on the left side of your nice photo appears to be the 64 and later passenger car stylie. Originals I have are shorter than yours.
By the way I am under the impression that the entire 63& E64 production of FI's used the cast steel 590 PCV.

The 590C is a service replacement for 63 and was not used on the St. Louis line. JD

[Timothy B.]

Re: 1963 PCV valve

John,

I just looked at the picture Joe Lucia posted of the 1962 PCV and it's identical to the valve I have down to the narrow nipple where the hose attaches. This valve measures approx 2 9/16" total length.

I hope he reads this and comments on the pic I posted of this valve, I would like to learn more about Stanadyne valves, maybe AC made them or Stanadyne made them for AC.

I hope someone posts a pic of a original pcv for early 63 so I know what to look for at Carlisle.

[David L.]

Re: 1963 PCV valve

David, This morning I am working on a customers 63 FI and compared his original 590 PCV to your photo.
I may be wrong but your early 590 PCV on the left side of your nice photo appears to be the 64 and later passenger car stylie. Originals I have are shorter than yours.
By the way I am under the impression that the entire 63& E64 production of FI's used the cast steel 590 PCV.

The 590C is a service replacement for 63 and was not used on the St. Louis line. JD

John,
My CV 590C PCV valve (measures about 2.583" in length) shown on the left side on my photo appears to be identical as best as I can remember to the CV 590 PCV valves that I once owned back in the 1980's which came from 1963 Chevrolets w/283 engines. They are not cast but appear to me to be machined from a solid piece of steel. I believe my "machined steel" CV 590C PCV valve is from a 1964 (maybe even an "early" 1964). I have several "stamped steel" CV 590C PVC valves (the one on the right side of my picture) that I found on 1964-1967 Chevrolets with 283 engines back in the 1980's. I believe the change from "machined steel" to "stamped steel" occurred sometime in 1964. In 1964 the PCV valve was modified internally (and hence the stamped "C" was then added) because some of the 1963's had a problem with oil coming out of the dipstick tube. The 1964 dipstick also has a different stopper (bell shaped steel or rubber cup) to help correct this problem. I can't remember if the assembly line 1964 dipsticks had the rubber cup stopper or the steel bell shaped stopper.
Dave

[Joe L.]

Re: 1963 PCV valve

John,

I just looked at the picture Joe Lucia posted of the 1962 PCV and it's identical to the valve I have down to the narrow nipple where the hose attaches. This valve measures approx 2 9/16" total length.

I hope he reads this and comments on the pic I posted of this valve, I would like to learn more about Stanadyne valves, maybe AC made them or Stanadyne made them for AC.

I hope someone posts a pic of a original pcv for early 63 so I know what to look for at Carlisle.

Tim------


Yes, the configuration of the valve is identical or virtually identical to the 62 valve I posted a photo of. Of course, the numbers and other information stamped on it are different.

In these very early years of PCV, I think it may be that there was some commonality of the housing used for differently calibrated valves. Since these valves were a 2 part assembly with a threaded joint, different internals could be installed in the same housings and, thus, different valves created. It may also be that some other source, Standyne or someone else, manufactured the housings. It's also very possible, even likely, that the housings were manufactured by AC and sold to to other manufacturers, either as the housing alone or as a complete valve with whatever information was desired stamped on it.

[Timothy B.]

Re: 1963 PCV valve

Thanks Joe,

This valve is quite a piece of metal for just a PCV. I take it this configuration is only on 62 pcv equiped cars. So 1963 looks like David's left side picture thus the machining is different.

[Joe L.]

Re: 1963 PCV valve

Thanks Joe,

This valve is quite a piece of metal for just a PCV. I take it this configuration is only on 62 pcv equiped cars. So 1963 looks like David's left side picture thus the machining is different.

Tim------


There were quite a few of these very early valves that were of this general construction. They varied somewhat, of course, in specific configuration in order to meet the fitment requirements of the application. But, they are all of the machined steel shell construction. Some time ago I purchased a whole box full of real old NOS AC valves. There were only a few Corvette-utilized valves in there, but many of the rest were of the machined steel type. I never even bothered to figure out what they were for after I identified all the Corvette valves.

In the old days, during my one-and-only employment in the automotive industry as a part time pump jockey and mechanic's helper at Tony's Chevron during the 1963-65 period while I was in high school, we used to clean these valves on cars in for service by disassembling them and cleaning the internals with Berryman's B-12. In those days, this type valve was common. VERY uncommon to see one now, though.

[David L.]

Re: 1963 PCV valve

Tim------


There were quite a few of these very early valves that were of this general construction. They varied somewhat, of course, in specific configuration in order to meet the fitment requirements of the application. But, they are all of the machined steel shell construction. Some time ago I purchased a whole box full of real old NOS AC valves. There were only a few Corvette-utilized valves in there, but many of the rest were of the machined steel type. I never even bothered to figure out what they were for after I identified all the Corvette valves.

In the old days, during my one-and-only employment in the automotive industry as a part time pump jockey and mechanic's helper at Tony's Chevron during the 1963-65 period while I was in high school, we used to clean these valves on cars in for service by disassembling them and cleaning the internals with Berryman's B-12. In those days, this type valve was common. VERY uncommon to see one now, though.

Joe,
How do you disassemble the machined steel shell PVC valves without destroying them? Is it necessary? I always thought that by just soaking them in some kind of solvent for a few days would clean them.
Dave