Cork or rubber?
Lead Driver
Joined: Feb 2003
Posts: 8,140
Likes: 4
From: Oak Harbor, OH
Cork will be OK if you don't need to take the covers back on. I'd go with the rubber, they tend to seal better and require no added sealer. If you're carefull with them when you remove 'em you can reuse them.
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
My feeling is that cork is 1930s gasket technology. I prefer rubber but will use cork if that's all I can get. If you seal it up well and don't plan on having to go back in for a while (till the darn cork gaskets begin to leak after a bunch of heat cycles) then cork is okay, but rubber holds up better and is much easier to get off if you do have to go back in for any reason.
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
Go with Fel-Pro PermaDry Plus. They are especially made for particular applications, including the 2.9L and 4.0L OHV Ford engines. They are rubber composite and have a "hinged carrier" design for the "step" where the lower intake and heads meet up.
