67 BB PCV Valve

[James L.]

Could someone tell me which is correct for a 67 435. Got these with my car years ago.
Thanks

[Joe L.]

Re: 67 BB PCV Valve

Could someone tell me which is correct for a 67 435. Got these with my car years ago.
Thanks

James-----


I can't read the numbers on the valves in the photo. In any event, very early cars probably used the AC CV-691C. Later used the CV-736C.

[James L.]

Re: 67 BB PCV Valve

Thanks Joe. All the valves say AC type CV 736C. I was wondering which shape was right?

[Joe L.]

Re: 67 BB PCV Valve

Thanks Joe. All the valves say AC type CV 736C. I was wondering which shape was right?

James-----


On that point, I'm not sure. However, I think I can narrow it down to 2---the one in the middle or the one on the right. I kind of lean to the one in the middle.

Is there a letter on the "plunger" inside the valves? If it's there, it will be seen through the hole in the bottom of the valves?

[Jerry M.]

Re: 67 BB PCV Valve

James
For what it's worth, the PCV valve that was in my March built '66 big block when I bought it in late '75 with 52xxx miles on it was a CV-691C and lookes like the valve on the far left in your picture.
The 691C for a '66 seems to agree with Joe's comment, but I'm thinking the 736C for your '67 should look like this also.
I've always thought that valves such as these were correct in that they allow the round ID tag to lay very close to the rubber grommet (as original photos seem to indicate) and not stand up in the air as they would with a valve as shown to the far right in your photo.
Jerry