# Intake manifold vacuum port. To tape or not to tape

**URL:** <https://community.cartalk.com/t/intake-manifold-vacuum-port-to-tape-or-not-to-tape/108004>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, corvette\
**Created:** [September 22, 2017, 7:25pm UTC](https://community.cartalk.com/t/intake-manifold-vacuum-port-to-tape-or-not-to-tape/108004 "2017-09-22T19:25:04Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![CascadeDiver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cascadediver/32/7964_2.png) [@CascadeDiver](https://community.cartalk.com/u/CascadeDiver)\
**Post date:** [September 22, 2017, 7:25pm UTC](https://community.cartalk.com/t/intake-manifold-vacuum-port-to-tape-or-not-to-tape/108004/1 "2017-09-22T19:25:04Z")

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When putting the vacuum port on the intake should I use Teflon tape to help make a good seal? My gut feeling says no because I wouldn’t want any Teflon tape fragments to get in the intake…

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [September 22, 2017, 7:52pm UTC](https://community.cartalk.com/t/intake-manifold-vacuum-port-to-tape-or-not-to-tape/108004/2 "2017-09-22T19:52:01Z")

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I prefer a thread sealant.

[https://www.permatex.com/products/thread-compounds/thread-sealants/permatex-thread-sealant-with-ptfe/](https://www.permatex.com/products/thread-compounds/thread-sealants/permatex-thread-sealant-with-ptfe/)

Tester

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**Author:** ![Vettewine](https://avatars.discourse-cdn.com/v4/letter/v/85e7bf/32.png) [@Vettewine](https://community.cartalk.com/u/Vettewine)\
**Post date:** [September 22, 2017, 9:24pm UTC](https://community.cartalk.com/t/intake-manifold-vacuum-port-to-tape-or-not-to-tape/108004/3 "2017-09-22T21:24:05Z")

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I agree with Tester that you should use a thread sealant (Permatex is excellent).

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [September 23, 2017, 12:36am UTC](https://community.cartalk.com/t/intake-manifold-vacuum-port-to-tape-or-not-to-tape/108004/4 "2017-09-23T00:36:40Z")

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Make mine another vote for Tester’s suggestion.  
Although I seriously doubt of a little thread of PTFE would survive the combustion chamber. 😜

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [September 23, 2017, 11:40pm UTC](https://community.cartalk.com/t/intake-manifold-vacuum-port-to-tape-or-not-to-tape/108004/5 "2017-09-23T23:40:25Z")

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I doubt anything is needed, other than just removing any debris from the threads and tightening to the spec in foot-pounds.