FYI Here is a AC brand PCV that is different and incorrect compared to the AC C5 marked one in the for sale section. You can compare the two .The most striking difference is the dimensions of the hex between the two. The black chromate finish is the other. https://www.ebay.com/itm/1965-66-Mustang-K-code-Shelby-GT-PCV-Valve-CV666C-6421977-NIB/272999266071
The one in the for sale section is like assemblyline even though it is in a AC box. OEM mfg sometimes sold the same Ford spec parts they to the aftermarket. The C5 engineering number is not a trademark so it in no harm no foul for it to be on the part being sold to the aftermarket I have the exact same marked PCV in a old style blue FOMOCO. I suppose the auction PCV is a later version which is why it looks different. My post was deleted (no cross talk i suppose) from where I originally posted it with the relevant part when someone posted a question about the box.
Yes Bob , I too believe the "black" one is an '80s - '90s part. I've seen many in more modern AC Delco packaging. I also have one made of aluminum and no part numbers. It doesn't look "homemade".
Randy
when did assemblyline go from hex to round style?
I haven't seen an AC # PV666C "round" body ( no hex). Ford would not put the C5AE part number on one with a round body. The part number would have to change.
Randy
C6AE is the part # on the round one.
Did assembly line have "spark plug type" marking like the one in for sale section?
Quote from: gt350hr on April 23, 2018, 02:46:35 PM
I haven't seen an AC # PV666C "round" body ( no hex). Ford would not put the C5AE part number on one with a round body. The part number would have to change.
Randy
+1 The later non-rebuildable ones were different
any idea when the c6ae nonrebuildable pcv valve came out?
Quote from: EdwardGT350 on April 23, 2018, 08:15:16 PM
any idea when the c6ae nonrebuildable pcv valve came out?
My guess is they came into use after the first of the year 66 from observations. They were also used side by side with the C5 hex shape through the end of production. I have seen vintage photos with both. I even have a vintage picture of a 67 model with the C5 hex shape. It might have been a extra inventory thing.
Haven't been able to place a specific point of the change over or the introduction of the newer style. The fact that there were plenty of the earlier versions on shelves of dealerships, regular maintenance schedules, it being a fairly often changed out part and the possibility that they were still being used at the plant makes for a challenge IMHO
Right now, for me it appears to be somewhere in the Dec 65 - Jan 66 built cars. Need to check through all the Mustang data and pictures to see if that can add anything to the discussion
Quote from: J_Speegle on April 23, 2018, 10:22:37 PM
Haven't been able to place a specific point of the change over or the introduction of the newer style. The fact that there were plenty of the earlier versions on shelves of dealerships, regular maintenance schedules, it being a fairly often changed out part and the possibility that they were still being used at the plant makes for a challenge IMHO
Right now, for me it appears to be somewhere in the Dec 65 - Jan 66 built cars. Need to check through all the Mustang data and pictures to see if that can add anything to the discussion
Jeff, you would think that your statement would be valid and is what I used to feel was probable also. I have since changed my point of view. The reason being Vintage magazine photos seem to indicate both types even one 67 photo with the C5 hex. I had to change my point of view on a maintenance change given multiple factory type loaner cars used for magazines that typically are low mileage prior to first oil change (block color oil filter). Just had to give it the benefit of the doubt based on what I have seen.
I've seen plenty of the C6 version on C and A code '66 engines , but few on K code engines. Engines ( just like cars) were built at the assembly plants to "build sheets" that specified every part used in the assembly. It is "my opinion" that the C5 Pcv valve was carried over to the '66 K code builds. The engine warranty code tag did change but was mainly because of the fuel system changes , Carb , fuel line and fuel pump.
Randy
Quote from: gt350hr on April 24, 2018, 10:56:53 AM
I've seen plenty of the C6 version on C and A code '66 engines , but few on K code engines. Engines ( just like cars) were built at the assembly plants to "build sheets" that specified every part used in the assembly. It is "my opinion" that the C5 Pcv valve was carried over to the '66 K code builds. The engine warranty code tag did change but was mainly because of the fuel system changes , Carb , fuel line and fuel pump.
Randy
Randy, I would like to point out by your observation statement that you have seen a few C6 style used also in 66 . That supports my observations that both C5 and C6 were used for whatever reason. They both had the same designation (operated the same) engineering number not withstanding which would seem to indicate that it wasn't a design difference but some kind of supply difference.
I have 2 of what I believe to be assembly line (Hex style) PCV's marked
--- C5AE-6A666-B-C.S.CO.--- this is only marking. Would you agree these are originals and
anyone know what C.S.CO. stands for?
Kurt.
Quote from: 67350#1242 on April 24, 2018, 03:59:22 PM
I have 2 of what I believe to be assembly line (Hex style) PCV's marked
--- C5AE-6A666-B-C.S.CO.--- this is only marking. Would you agree these are originals and
anyone know what C.S.CO. stands for?
Kurt.
Kurt,
Those are original, C.S. CO was the other valve manufacturer besides AC, don't know what C.S. CO. stand's for...
Dave
Quote from: 67350#1242 on April 24, 2018, 03:59:22 PM
I have 2 of what I believe to be assembly line (Hex style) PCV's marked
--- C5AE-6A666-B-C.S.CO.--- this is only marking. Would you agree these are originals and
anyone know what C.S.CO. stands for?
Kurt.
I have only seen the engineering number marked on PCV's that were used by Ford regardless of if sold over the parts counter as service parts or on Auto Parts store shelf's for the mass's. The parts counter PCV are in Ford boxes and the Auto Part store ones will be boxed in there OEM MFG marked box .In those cases it is typically the same PCV just different box.
cant upload photo of c6 version
Bob's experience mirrors mine. I have found AC boxed parts with the C5AE number on them and others with only the AC part number. They are getting harder to find in NOS with the Ford part number on them.
Quote from: 67350#1242 on April 25, 2018, 10:07:29 PM
QuoteBob's experience mirrors mine. I have found AC boxed parts with the C5AE number on them and others with only the AC part number. They are getting harder to find in NOS with the Ford part number on them.
Are they $500 worth of hard to find?
https://www.ebay.com/itm/NOS-1965-66-Ford-Mustang-Shelby-K-Code-PCV-Valve-C5AZ-6A666-A1-RARE-EARLY-TYPE/152778570941?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649
They typically sell for less. I haven't seen one sell for that much but who knows.
There is another variant not mentioned yet. I looked at my "assembly line" valve on my original engine last night. It has a .020 wide "v notch" cut into the "points" of the hex area half way up the hex. None of my other ones have it but I have seen others like it. Not stirring the pot just noting a difference.
Randy
Quote from: gt350hr on April 26, 2018, 11:54:00 AM
There is another variant not mentioned yet. I looked at my "assembly line" valve on my original engine last night. It has a .020 wide "v notch" cut into the "points" of the hex area half way up the hex.
Like this one/style? Forms sort of a "diamond? look on the finished product Have seen that style many times
(http://www.concoursmustang.com/forum/gallery/10/6-280418173049.jpeg)
Picture from a magazine article. Can't tell the version/style but IMHO something caught the sunlight just right part way up the side of the PCV
(http://www.concoursmustang.com/forum/gallery/10/6-280418173107.jpeg)
Service replacement example/part
(http://www.concoursmustang.com/forum/gallery/10/6-280418173034.jpeg)
Don't know if its the cutting depth, tip of the cutting tool or angle while looking at it without having them in hand next to one another. Have pictures with this cuts into the hex area through 67 versions but each looks similar but different in ways
Could post but not sure it it would help
Quote from: J_Speegle on April 28, 2018, 05:33:36 PM
Quote from: gt350hr on April 26, 2018, 11:54:00 AM
There is another variant not mentioned yet. I looked at my "assembly line" valve on my original engine last night. It has a .020 wide "v notch" cut into the "points" of the hex area half way up the hex.
Like this one/style? Forms sort of a "diamond? look on the finished product Have seen that style many times
(http://www.concoursmustang.com/forum/gallery/10/6-280418173049.jpeg)
Service replacement example/part
(http://www.concoursmustang.com/forum/gallery/10/6-280418173034.jpeg)
Don't know if its the cutting depth, tip of the cutting tool or angle while looking at it without having them in hand next to one another. Have pictures with this cuts into the hex area through 67 versions but each looks similar but different in ways
Could post but not sure it it would help
Just so no one gets the wrong idea although these pictures are excellent examples of the detail being discussed the picture parts are for the earlier style PCV that screws into the brass fitting it is not a replacement for any year GT350.
Quote from: gt350hr on April 26, 2018, 11:54:00 AM
There is another variant not mentioned yet. I looked at my "assembly line" valve on my original engine last night. It has a .020 wide "v notch" cut into the "points" of the hex area half way up the hex. None of my other ones have it but I have seen others like it. Not stirring the pot just noting a difference.
Randy
Randy,
That is the C.S.CO version mentioned previously. Looks similar to Jeff's pics but has the non-threaded hose connection.
Dave
FWIW, my C5 hex (no thread) assembly line original does not have the vertical "XXXXX" markings like the AC I recently saw for sale.
I have another C5 Hex with SSC in a segmented circle in the manufacturers spot - also has the splits on the points.
Bob ,
Mine has the non threaded , regular "nipple top". I believe Jeff posted his pic to verify the "notches" I spoke of. I also have several like the one in Jeff's pic as they were used on 390 and 428 engines.
Randy
Quote from: gt350hr on April 30, 2018, 10:38:56 AM
Bob ,
Mine has the non threaded , regular "nipple top". I believe Jeff posted his pic to verify the "notches" I spoke of. I also have several like the one in Jeff's pic as they were used on 390 and 428 engines.
Randy
That is exactly why Jeff posted it. I was clarifying so someone didn't confuse the C4 threaded 289 pcv valve style with the nipple version. The hex C4 threaded style is a 20-40.00 piece on a good day. The Hex C5 nipple version sells for many times that amount.
More stuff for the totes headed to the swap meet at SAAC 43!
Randy
Quote from: 67350#1242 on April 30, 2018, 09:09:08 AM
I have another C5 Hex with SSC in a segmented circle in the manufacturers spot - also has the splits on the points.
I had forgotten about that version which appears almost identical to the C5AE C.S.CO version, including the tick marks on the hex points. Thanks for reminding me.
Dave
I didn't know there was so much to this PCV Valve. I currently have a round version on 0031. Is the EV-50 in a Hex version the correct one? C5AZ-6A666-A
This is for your early '67 GT350 with SJ build date in late 1966 correct?
Quote from: rcgt350 on February 25, 2019, 02:22:15 PM
I didn't know there was so much to this PCV Valve. I currently have a round version on 0031. Is the EV-50 in a Hex version the correct one? C5AZ-6A666-A
Well I wouldn't stake my life that the round C6 version was wrong however we do have a period photo of a early car (50 or 51?)with the hex headed C5 marked PCV. Given the choice between the two I would choose the C5 PCV simply because there is a historic picture of a car that is near the build date of your car. Just my opinion. Others may have different.
I was looking through my collection and found one with an aluminum body! Identical machining to an AC version. No numbers on it at all. Must be the "lightweight " version LOL.
Randy