Intake manifold sealant

[CityHick]

My EFI project is finally underway and as such I'll be replacing my intake manifold. My engine hasn't been apart since Ford put it together and put it into a crate to ship it to me. It has never leaked, anywhere and I want to keep it that way.

So... I have a pair of intake manfold gaskets for where the manifold mates with the heads. I know to eliminate the end gaskets and use Right Stuff there. My question is what to use on the gaskets themselves. I have read a ton of recommendations all over the web. Some say to use the copper spray stuff, others recommend a sealant available at Harley dealers, and so on. What has worked for you?

Thanks and happy new year guys.
Tony

[TBS-POPS]

Re: Intake manifold sealant

Depends on what kind of gaskets tony. Ones like the blue Fel-pro's will leak if you put anything on them. Mr gasket type, thin coat of Rightstuff on the ends around water passages is all. Good to go!

If you dimple the ends of the block and manifold with a center punch, it will hold the end sealant better too.

[CityHick]

Re: Intake manifold sealant

Thanks Jeff!
I was handed these gaskets out of a pile of spares and told "these will work". I have no idea what they are... blackish color and kind of a cardboard texture. I do know they match the intake manifold so I know they're right... but no clue beyond that.

[crawlin68]

Re: Intake manifold sealant

I would toss those and order a pair of FelPro gaskets that have the thin blue line around each intake runner. As Jeff stated, don't put anything on them. I used these when I put mine on years ago and they sealed up great and have never leaked. Can't wait to see this EFI on your Bronco!!

[CityHick]

Re: Intake manifold sealant

I would toss those and order a pair of FelPro gaskets that have the thin blue line around each intake runner. As Jeff stated, don't put anything on them. I used these when I put mine on years ago and they sealed up great and have never leaked. Can't wait to see this EFI on your Bronco!!

Alrighty you guys have convinced me. FelPro Gaskets for the intake.
I can't wait to see this EFI on my Bronco either, long overdue. I am off work today and doing a ton of research, may yank the carb intake manifold and dizzy today, we'll see. Need a harness and computer, and a few sensors but I'm getting closer.

[Action]

Re: Intake manifold sealant

I would not use the felpro 1250 as they have been known to fail.
Jack