Author Topic: Should sealant be used on the vacuum outlets on the intake manifold?  (Read 334 times)

Offline Stewart G Griffin

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Should thread sealant be used on the vacuum outlets in the intake manifold----like for trans vacuum modulator, vacuum advance etc.?

Offline VileZambonie

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Re: Should sealant be used on the vacuum outlets on the intake manifold?
« Reply #1 on: September 15, 2021, 06:14:57 PM »
Negative, dry installation, no clamps or sealants with the exception of evap hoses which should have a tension clamp.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Stewart G Griffin

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Re: Should sealant be used on the vacuum outlets on the intake manifold?
« Reply #2 on: September 18, 2021, 01:30:49 PM »
Ok.   But just to make clear, i meant the threads the screw into the intake manifold, not the hoses that connect to the fitting.
« Last Edit: September 18, 2021, 05:42:55 PM by Stewart G Griffin »

Offline JohnnyPopper

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Re: Should sealant be used on the vacuum outlets on the intake manifold?
« Reply #3 on: September 28, 2021, 04:30:56 PM »
I use pipe tape on those threads.
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1973 C-20, 3+3 454 4BBL TH400  Water Injection
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Offline Shifty

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Re: Should sealant be used on the vacuum outlets on the intake manifold?
« Reply #4 on: September 28, 2021, 05:21:56 PM »
I use pipe tape on those threads.
Liquid version of the same thing for me.
87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

Offline VileZambonie

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Re: Should sealant be used on the vacuum outlets on the intake manifold?
« Reply #5 on: September 28, 2021, 05:49:58 PM »
So let's rephrase the question like this: Should thread sealant be used on pipe threads? Answer = Yes
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                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10