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Thread: Need help finding correct size plug for intake manifold

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    Forum User verified Feedback Score 6 (100%) MADMarc's Avatar
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    Need help finding correct size plug for intake manifold



    I took the nipple that is circled above to napa in an attempt to find a plug, or small bolt, or something but failed. I'm assuming it is BPT so with that said, does anybody know the correct size plug that I could use to plug that nipple on my intake manifold?

    Much thanks in advance for any help.

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    XLR8TOR Feedback Score 0
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    May we inquire as to why you feel the need to do this?

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    Forum User supporter Feedback Score 1 (100%) Rocket's Avatar
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    And here I am thinking of drilling and tapping mine for extra ports so I don't have the Boost gauge Tee'd into anything else or the ebc.

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    Forum User verified Feedback Score 6 (100%) MADMarc's Avatar
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    Quote Originally Posted by MaxClass View Post
    May we inquire as to why you feel the need to do this?
    To get into the cool crowd Well, okay, maybe not. I did a pressure test a bit ago and found that my brake booster line from the intake manifold w/the check valve was leaking like a mofo and was rock hard. A week later when I received the part, installed it and did another pressure test the hose coming from that port (in the pic above) w/the check valve is leaking as well but much less than the one for the brake booster. I want to get rid of the clutch vacuum reservoir and tee off of the line going to the brake booster rather than having to buy another expensive check valve hose. I would much rather put a plug in place where that nipple is than to put a cap on it.

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    Forum User verified Feedback Score 6 (100%) MADMarc's Avatar
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    Or hell, what have some of the other guys on here done that have gone w/tossing the vacuum reservoir?

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    Advanced Tech? verified Feedback Score 0 i3igpete's Avatar
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    Take the nipple to home depot, find a bolt with similar thread. However, you will find that even the shortest bolt is too long and will stick into the plenum chamber. You'll need to cut the bolt to be shorter but be careful not to mess up the threads too much. seal with nylon crush washer.
    Maddog Performance Engineering

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    You can also go down to any hardware store pick up a NPT socket head plug. drill it larger and retap. this will give you the plug, a good seal, and will not stick into the plenum at all

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    Quote Originally Posted by i3igpete View Post
    Take the nipple to home depot, find a bolt with similar thread. However, you will find that even the shortest bolt is too long and will stick into the plenum chamber. You'll need to cut the bolt to be shorter but be careful not to mess up the threads too much. seal with nylon crush washer.
    OFF TOPIC. I just had to say i3igpete your car looks bad ass!!!

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    Forum User verified Feedback Score 6 (100%) MADMarc's Avatar
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    Thanks for the info here guys. I will check out both options HOPEFULLY tomorrow or soon

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    I believe you can ram a flywheel bolt into the hole. It's been a while since I plugged one up.

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