Resolved Trying to identify the 1G PCV valve and nipple thread.

[TrevorS]

I'm looking into installing a catch can and am considering including the PCV valve in the loop to the intake. To do this I'd want to either replace the valve with a nipple or else remove the actuator from within the valve. Since I haven't been able to open the valve, I'm thinking of moving the manifold PCV port nipple to the valve cover, but I'd need a bolt to run into the manifold to block the opening. So, I'm trying to figure out what bolt thread that would be, but so far no luck.

I took a PCV valve to Sears Hardware and determine a 10Mx1.25 nut is too small and 12Mx1.25 too large. I also tried 3/8"x24, but it was wrong as well. According to RRE, a 1/8 NPT nipple could be installed into the valve cover, but the cover would have to be tapped first, so that eliminates NPT. Looking at the valve, I think I'm seeing a taper in the thread, getting larger towards the body. Anybody know the answer?

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I don't want to tap either valve cover or manifold so I guess I could move the manifold nipple to the valve cover, cut the brass pipe off the valve, install it in the manifold, and then close it off with a piece of clamped tube. However, I'd really prefer to come up with something cleaner. Ideally, a bolt to close off the manifold port.

 

[silentscreamer]

the pcv valve along with the oil pressure sender are 1/8 bspt (british standard pipe thread) it is a pain to find anything that fits usually re-tapping is necesarry or you can buy a fitting that autometer makes to go from 1/8bspt to 1/8 npt. many of the vendors here sell them.

i am unsure of what the thread is on the manifold but i would guess it would be a similar bspt thread.

 

[TrevorS]

I learned of moving the manifold PCV nipple to the valve port from RRE, so I'm pretty sure the threads are the same. Time to start looking for an appropriate 1/8" BSPT fitting -- thanks very much !

 

[GDNF2ET]

There are shops that make hydraulic hose and sell industrial fittings in almost any industrial park..This is a link to such a shop in Norfolk, Va..This shop is so good they will start heading toward the supply rack after getting a glimpse of a part I'm trying to match up...They have helped me immensely with automotive fitting projects that I have had..
Hampton Rubber Company, Inc. - Welcome
Once you find the equivalent in your town, you will be set...

 

[TrevorS]

Thanks for the tip !

By the way, it just occurred to me (yeah, I'm slow ) there's likely a practical reason for that brass tube extension on the valve. Only thing I can think of is to clear an area likely to contain oil and better position to pickup gases instead. If that's the case, losing the brass tube extension at the valve cover port could be a real mistake (could suck excessive oil). Can anyone shed any light on that?