The Ford Barn

backrodebob · 03-19-2022, 01:38 PM

replacing intake gasket, silicone, no silicone or grease?
WHAT’s YOUR THOUGHTS???

petehoovie · 03-19-2022, 01:41 PM

Grease...

Zeke3 · 03-19-2022, 01:41 PM

Dry or grease, not silicone.

richard crow · 03-19-2022, 01:46 PM

nothing it,s a thick gasket

Brian · 03-19-2022, 01:49 PM

Grease, and here's why; using grease allows the surfaces to slide easily as they are torqued down. You know when you apply a sealer [silicon etc] to the gasket surface and torque it down, how the sealer squeezes out around the edges? - well it also squeezes into the engine, where it could end up being circulated in the oil. If you use grease, any of that seepage into the engine can be assimilated into the oil, or fuel /air mix in the inlet ports of said inlet manifold, causing no issues. Also, using grease will most times prevent the gasket sticking to either mating surface, which allows same gasket to be reused more than the once.

Bored&Stroked · 03-19-2022, 05:37 PM

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I wouldn't use RTV on an intake gasket . . . either dry, or sometimes I will coat it with gaskacinch. Most of these gaskets are very thick, so they really need nothing. I've never had a leaking intake gasket that I know of. Grease also works fine and makes it easy to take apart at a later date.

Kube · 03-19-2022, 05:44 PM

I have used nothing on a flathead intake gasket and I'd done a zillion of them with no issues. Modern engines require sealers.
I will, with respect, disagree with Brian in regard to silicone being "squeezed out". If that's the case, way too much was applied. Silicone only requires a very thin film. More is not better.

I'd also never consider using a gasket more than once. Gaskets for these Fords are cheap. I value my time more than the cost of a gasket.

A bones · 03-19-2022, 08:39 PM

Quote:

Originally Posted by Kube

I have used nothing on a flathead intake gasket and I'd done a zillion of them with no issues. Modern engines require sealers.
I will, with respect, disagree with Brian in regard to silicone being "squeezed out". If that's the case, way too much was applied. Silicone only requires a very thin film. More is not better.

I'd also never consider using a gasket more than once. Gaskets for these Fords are cheap. I value my time more than the cost of a gasket.

I was taught there is no such a thing as a used gasket. Once it's removed it is trash.

69a · 03-19-2022, 09:02 PM

Use anything sticky on the manifold side. I use "Hylomar Blue" and grease on the block side, as petehoovie says. It will always come off clean and in one piece. Keep it clean while you are working on why you removed it, and then put a very thin coating of grease on the block before refitting. Saves time and money.

Shu47 · 03-19-2022, 09:36 PM

Grease but very, very thin. Don't goop it on.

Karl · 03-21-2022, 03:49 AM

I use grease
I was told that gas vapour will disolve RTV over time so not to be used on the inlet side -Not sure if this is true but fiqured not worth the risk . I found RTV and silicone very useful when assembling my 1910 Hupmobile engine . Given the age of the castings no mating surfaces even aproximated flat or smooth and the goop evened up the gaps better than any gasket would

03-19-2022, 01:38 PM	#1
backrodebob Member Join Date: Jul 2019 Location: Union City, CA Posts: 57	Your thoughts? replacing intake gasket, silicone, no silicone or grease? WHAT’s YOUR THOUGHTS???

03-19-2022, 01:41 PM	#2
petehoovie Senior Member Join Date: May 2015 Posts: 11,645	Re: Your thoughts? Grease... __________________

03-19-2022, 01:41 PM	#3
Zeke3 Senior Member Join Date: Dec 2014 Location: Columbus, IN Posts: 1,646	Re: Your thoughts? Dry or grease, not silicone.

03-19-2022, 01:46 PM	#4
richard crow Senior Member Join Date: May 2010 Posts: 1,908	Re: Your thoughts? nothing it,s a thick gasket

03-19-2022, 01:49 PM	#5
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 4,097	Re: Your thoughts? Grease, and here's why; using grease allows the surfaces to slide easily as they are torqued down. You know when you apply a sealer [silicon etc] to the gasket surface and torque it down, how the sealer squeezes out around the edges? - well it also squeezes into the engine, where it could end up being circulated in the oil. If you use grease, any of that seepage into the engine can be assimilated into the oil, or fuel /air mix in the inlet ports of said inlet manifold, causing no issues. Also, using grease will most times prevent the gasket sticking to either mating surface, which allows same gasket to be reused more than the once. __________________ Unfortunately, two half wits don't make a whole wit!

03-19-2022, 05:37 PM	#6
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,906	Re: Your thoughts? Sponsored Links (Register now to hide all advertisements) I wouldn't use RTV on an intake gasket . . . either dry, or sometimes I will coat it with gaskacinch. Most of these gaskets are very thick, so they really need nothing. I've never had a leaking intake gasket that I know of. Grease also works fine and makes it easy to take apart at a later date.

03-19-2022, 05:44 PM	#7
Kube Super Moderator Join Date: May 2010 Location: Wisconsin, USA Posts: 10,543	Re: Your thoughts? I have used nothing on a flathead intake gasket and I'd done a zillion of them with no issues. Modern engines require sealers. I will, with respect, disagree with Brian in regard to silicone being "squeezed out". If that's the case, way too much was applied. Silicone only requires a very thin film. More is not better. I'd also never consider using a gasket more than once. Gaskets for these Fords are cheap. I value my time more than the cost of a gasket. __________________ "I can explain it for you. However, I can't understand it for you".

03-19-2022, 09:02 PM	#9
69a Senior Member Join Date: Aug 2020 Posts: 326	Re: Your thoughts? Use anything sticky on the manifold side. I use "Hylomar Blue" and grease on the block side, as petehoovie says. It will always come off clean and in one piece. Keep it clean while you are working on why you removed it, and then put a very thin coating of grease on the block before refitting. Saves time and money.

03-19-2022, 09:36 PM	#10
Shu47 Senior Member Join Date: Feb 2011 Location: Maltby, Washington Posts: 187	Re: Your thoughts? Grease but very, very thin. Don't goop it on.

03-21-2022, 03:49 AM	#11
Karl Senior Member Join Date: May 2010 Location: Manawatu, New Zealand Posts: 1,420	Re: Your thoughts? I use grease I was told that gas vapour will disolve RTV over time so not to be used on the inlet side -Not sure if this is true but fiqured not worth the risk . I found RTV and silicone very useful when assembling my 1910 Hupmobile engine . Given the age of the castings no mating surfaces even aproximated flat or smooth and the goop evened up the gaps better than any gasket would __________________ Such a fine sight to see-Its a Girl, My Lord, in a Flatbed Ford slowin' down to take a look at me.