On my '67 I just removed the original (faulty) pcv
and plugged the new Napa one in to the existing hoses.
The threaded end screwed nicely into the short hose to the manifold.
the other end took a bit more pushing but it fit too. I used hose clamps
just like before and it seems to be doing the trick nicely.
my scientific method for determining thread sizes are as follows.
Go to the best hardware store you know of.
Sort through the selection of nuts till you find one that fits the threads
then take that nut and find it's corresponding bolt and there you have it.
The label on the bolt bin will tell you the thread size/pitch.
it works for me.
dave
'67 Midget
-----Original Message-----
From: robert weeks <robert@woozy.com>
To: spridgets@autox.team.net <spridgets@autox.team.net>
Date: Sunday, February 21, 1999 1:59 PM
Subject: progress, not perfection (napa pcv valve tap size?)
>Hi everyone,
>
>Well, I pulled my engine yesterday and installed new sump seals, new oil
>pump seals, new backplate gasket, futzed with the top half of the rear seal
>and used liberal abounts of blue goop everywhere just in case, and the
>engine still leaks large amounts of oil out the rear. It's not as bad as it
>was before but it's still not good.
>
>I purchased the suggested NAPA PCV valve and I was going to install it in
>the intake manifold, but I cannot find a tap anywhere that matches this
>thing. I've been top four different stores in the last two days and no one
>has any idea what size this thread is.
>
>If anyone has drilled and tapped their manifold to use one of these I
>really appreciate it if you could write me off the list and let me know the
>tap size. I'll have to mail order the tap since I can't get it locally and
>it would really help to know the size.
>
>Hopefully a working PCV system will solve the oil leak, it looks like I'm
>going in the right direction. I would have installed the PCV valve while I
>had everything apart if I could have found this tap.
>
>Any help would be greatly appreciated. Otherwise I'll have to grind the
>thing down to 7/16 and cut new threads on it.
>
>Thanks,
>
>Robert
>
>
>
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