intake oil leak..again
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intake oil leak..again
so i now need to pull my intake off as it is really leaking oil now. i was hopeing to hold off a bit longer but no way. i've got new felpro gaskets to put on and i plan on using some 3M goop to seal them up tight. this is what the machinist used when it was built but i had to yank the intake due to push rod clearance issues in the intake. so my question is do i use the cork ends or leave them off? an old time ford tech told me they use to leave them off and use sealer on the ends, like a lot of chevy guys do. another guy told me to use the cork ends...so what will give me less chance of a leak. cus man these intakes are not fun to pull off...
Elder User
Joined: Jul 2003
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[QUOTE=sdg0080;8693842]. so my question is do i use the cork ends or leave them off? an old time ford tech told me they use to leave them off and use sealer on the ends, like a lot of chevy guys do.QUOTE]
I'm a chevy guy, your old timer is correct and wrong. Silicone is a gasket maker, not a gasket sealer and works well in certain circumstances. Use the front and rear cork gasket with gasket sealer and use silicone in each corner of the front/rear gasket joint where it connects to the intake gasket at the head. I have used permatex #2 at these joints with no problems as well.
You will find many posts with people using permatex silicone on gasket's, I never understood their thought process. Gasket maker vrs gasket sealer, the same manufacturer makes both.
As a side note, years ago as a joke, I rebuilt a motor using new head gaskets and seals only, and used silicone to seal everything else instead of gaskets, it lasted for years with no leaks.
I'm a chevy guy, your old timer is correct and wrong. Silicone is a gasket maker, not a gasket sealer and works well in certain circumstances. Use the front and rear cork gasket with gasket sealer and use silicone in each corner of the front/rear gasket joint where it connects to the intake gasket at the head. I have used permatex #2 at these joints with no problems as well.
You will find many posts with people using permatex silicone on gasket's, I never understood their thought process. Gasket maker vrs gasket sealer, the same manufacturer makes both.
As a side note, years ago as a joke, I rebuilt a motor using new head gaskets and seals only, and used silicone to seal everything else instead of gaskets, it lasted for years with no leaks.
Laughing Gas
Joined: Aug 2008
Posts: 840
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I've done it all three ways, cork with gasket shellac, cork with RTV, and RTV only. And in all cases, I uses RTV in the corners.
The cork with RTV is not recommended, although it worked fine for me. You just have to be careful the cork doesn't slide around when you lower the manifold on and align it. If you use cork and RTV, it's probably best to glue the cork down with the RTV and let it set-up before installing the manifold.
I was plagued by oil ingestion around the intake for years, and despite using different brand gaskets, the final cure was to have the heads and manifold surfaced at the Machine Shop. The manifold was slightly warped...very slight, but enough, and the heads were a bit pittted, but mostly around the water ports.
Speaking of the water ports, I always uses some gasket shellac around the side-gasket water port openings.....both sides of the gasket. Gives me piece of mind, if nothing else.
The cork with RTV is not recommended, although it worked fine for me. You just have to be careful the cork doesn't slide around when you lower the manifold on and align it. If you use cork and RTV, it's probably best to glue the cork down with the RTV and let it set-up before installing the manifold.
I was plagued by oil ingestion around the intake for years, and despite using different brand gaskets, the final cure was to have the heads and manifold surfaced at the Machine Shop. The manifold was slightly warped...very slight, but enough, and the heads were a bit pittted, but mostly around the water ports.
Speaking of the water ports, I always uses some gasket shellac around the side-gasket water port openings.....both sides of the gasket. Gives me piece of mind, if nothing else.
More Turbo
Joined: Nov 2007
Posts: 703
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From: Western Washington
I don't use the cork gaskets, I use Permatex Right Stuff gasket maker. I've used it on several 390 intakes and not one leak has been detected. And yes, be sure and get the corners real good. Good luck.
OJ
OJ
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Laughing Gas
Joined: Aug 2008
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Is your name Jeff? That's my brothers name..LOL He swears by that stuff, I hate it. We argue about using Indian Head shellac during every repair we perform together. While it may work, it's a BIOTCH to remove if you have to perform another repair. I have a bottle in my garage, I cringe every time I look at it.
Jeff (oops, ...no .... John, AKA Argess)
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Joined: Jan 2009
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From: Chesapeake, Va.
so i now need to pull my intake off as it is really leaking oil now. i was hopeing to hold off a bit longer but no way. i've got new felpro gaskets to put on and i plan on using some 3M goop to seal them up tight. this is what the machinist used when it was built but i had to yank the intake due to push rod clearance issues in the intake. so my question is do i use the cork ends or leave them off? an old time ford tech told me they use to leave them off and use sealer on the ends, like a lot of chevy guys do. another guy told me to use the cork ends...so what will give me less chance of a leak. cus man these intakes are not fun to pull off...
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