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Author Topic: Confused About PCV Valves  (Read 2151 times)

Offline 69GTconvert

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Confused About PCV Valves
« on: July 28, 2014, 03:04:41 PM »
Which PCV valve would be correct for my 1969 Mustang with a 390 and 4 speed, built in Dearborn on April 8th?

The Mansfield Mustang site says I need part number D0AZ-6A666-A but that's a 1970 part number. Was there another PCV valve part number used in 1969 or is this correct?

Also, I have seen what appears to be a black plastic valve and a metallic PCV valve with this part number and I'm not sure which is correct for my application as I am going concours.

Thanks.
« Last Edit: July 28, 2014, 05:17:22 PM by 69GTconvert »
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George
Georgia

1969 Mustang GT Convertible
390 4V, Close Ratio 4 Speed
Royal Maroon - Black Standard Interior w/ High Back Seats

Offline 7Lscjracer

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Re: Confused About PCV Valves
« Reply #1 on: July 28, 2014, 04:35:15 PM »
That number is a motorcraft ev50 and you'll see it stamped with a D2 number so it's only good as a service replacement
For show you need the autolite part which will be black and metal not plastic
Sorry don't know that number offhand
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69 Mach 1 San Jose Nov. 68 build
Bought May '81, sold Sept '20

Offline J_Speegle

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Re: Confused About PCV Valves
« Reply #2 on: July 28, 2014, 07:42:45 PM »
Quote from: 69GTconvert on July 28, 2014, 03:04:41 PM
Which PCV valve would be correct for my 1969 Mustang with a 390 and 4 speed, built in Dearborn on April 8th?

The Mansfield Mustang site says I need part number D0AZ-6A666-A but that's a 1970 part number. Was there another PCV valve part number used in 1969 or is this correct?

They are likely using a Quick Reference Manual from 70 +   or a later printing of the MPC that would show the service replacement pieces

Think the EV-50 is for 70 302's and the 351's  but sill double check. My records show I've got a couple of NOS ones but don't think they are right for your needs. Think it might be a EV-42 (C7OZ-6A666-A ) which is one of the ones used on the Boss 302 also

As  7Lscjracer mentioned your looking for a metal one with the engineering number and the short code on the outer surface
« Last Edit: July 28, 2014, 07:49:38 PM by J_Speegle »
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Jeff Speegle

Anything worth doing is worth doing concours ;)

Offline J_Speegle

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Re: Confused About PCV Valves
« Reply #3 on: July 28, 2014, 07:56:29 PM »
OK if the  books are correct  the EV-42 (C7OZ-6A666-A ) was installed in 1969 until Feb 21, 69 then replaced with EV-50 (C6AE-6A666-B) after that date. This would include your April built car.

So now you have something to search around for - not unusual for these to show up on Ebay since they were replacement pieces so thousands or tens of thousands were produced and distributed over the years. Just make sure your getting metal, AUTOLITE and the right number

Good luck
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Jeff Speegle

Anything worth doing is worth doing concours ;)

Offline 69GTconvert

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Re: Confused About PCV Valves
« Reply #4 on: July 29, 2014, 10:37:02 AM »
Jeff and 7Lscjracer, thanks for clearing this up. Will be on the outlook for the correct EV-50.
« Last Edit: July 29, 2014, 10:39:37 AM by 69GTconvert »
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George
Georgia

1969 Mustang GT Convertible
390 4V, Close Ratio 4 Speed
Royal Maroon - Black Standard Interior w/ High Back Seats
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