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Question on thread pitch for the PCV valvle

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Offline jweese

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Question on thread pitch for the PCV valvle
« on: February 18, 2011, 07:47:24 PM »
I am trying to put in a new pcv valve in my 86 and can't get the new one to thread in.  I need to tap the hole in the intake but i don't know what tap to get.  I've tried 14/1.5mm die and it seemed a lttle loose on the old valve threads so then I tried a 1/4 18 NPT thread thinking it might be a pipe thread and the die is too small.   >:(  Does anyone know what tap and die to use for that?  It's the last thing I need to get the vehicle running good.
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'86 Samurai, SPOA lift, blue with some rust
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Offline jweese

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Re: Question on thread pitch for the PCV valvle
« Reply #1 on: February 19, 2011, 08:16:31 AM »
Someone has to know...
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'86 Samurai, SPOA lift, blue with some rust
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Offline Drone637

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Re: Question on thread pitch for the PCV valvle
« Reply #2 on: February 19, 2011, 11:07:56 AM »
Try giving Hawk Suzuki or Low Range a call, they might know off hand.  If I need to find a thread I'll usually go to a hardware store and just start trying out random nuts until I find one that fits.
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Offline jweese

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Re: Question on thread pitch for the PCV valvle
« Reply #3 on: February 19, 2011, 04:42:03 PM »
THat's what I did.  Two trips to the automotive store and one to home depot.  I believe it's a 1/4 NPT but I want to make sure before I go tapping into the intake manifold. ???
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Offline tipover

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Re: Question on thread pitch for the PCV valvle
« Reply #4 on: February 23, 2011, 01:03:48 AM »
Is it tapered?
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