LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What size is the PCV nipple on the throttle body?

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Old Feb 5, 2005 | 06:03 PM
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Mullet Z28's Avatar
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From: Jekyll Island, GA
What size is the PCV nipple on the throttle body?

The biggest vacuum cap I could find at Pep Boys was 3/8-inch, which doesn't seem big enough. What size cap to I need to block off the nipple the PCV tube attaches to on the throttle body?
Old Feb 5, 2005 | 10:09 PM
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Re: What size is the PCV nipple on the throttle body?

The stock hose for the crankcase vent is 1/2" I.D.
Old Feb 5, 2005 | 11:31 PM
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Re: What size is the PCV nipple on the throttle body?

Thanks for the info as always, Rob!
Old Feb 9, 2005 | 07:34 PM
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Mullet Z28's Avatar
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Re: What size is the PCV nipple on the throttle body?

Another dumb question. Where can I get a 1/2-inch vacuum cap? I've tried a few auto parts and hardware stores without any luck.
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