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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Stewart G Griffin on September 14, 2021, 08:44:47 pm

Title: Should sealant be used on the vacuum outlets on the intake manifold?
Post by: Stewart G Griffin on September 14, 2021, 08:44:47 pm

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

Title: Re: Should sealant be used on the vacuum outlets on the intake manifold?
Post by: VileZambonie 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.

Title: Re: Should sealant be used on the vacuum outlets on the intake manifold?
Post by: Stewart G Griffin 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.

Title: Re: Should sealant be used on the vacuum outlets on the intake manifold?
Post by: JohnnyPopper on September 28, 2021, 04:30:56 pm

I use pipe tape on those threads.

Title: Re: Should sealant be used on the vacuum outlets on the intake manifold?
Post by: Shifty on September 28, 2021, 05:21:56 pm

Quote from: JohnnyPopper on September 28, 2021, 04:30:56 pm

I use pipe tape on those threads.

Liquid version of the same thing for me.

Title: Re: Should sealant be used on the vacuum outlets on the intake manifold?
Post by: VileZambonie 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