I have a boosted '05 4.7l with a 2008 intake manifold. Due to this i had to cancel out the egr valve. Problem is this left an open port in the manifold. Under vacuum its fine how i have it plugged but now that I'm sending boost through it, thebung blows out and my engine accelerates uncontrollably. How have you guys sealed the port in your intake.....perminately?!

 

Have u tried one of those screw in caps?

 

With the EGR port, cant you put a plate over it and run 2 bolts through it, with nuts on the inside of the manifold? Or does the 2008 not have 2 mounting bolts for the egr tube? I know the 2005 manifold does.

 

Ah, its just a plastic hole, I wouldn't trust forcing a threaded nut into it seeing as it has no threads its self. Especially under boost. I have a shut off plate where the egr mounted to the block but its vent tube just plugs into the manifold using an o ring and the vacuum from the engine. If I could find a pvc tube and cap that fits in it, id cement it in and forget about it, but its such an odd size.

 

What about something like this? http://www.dieselplace.com/forum/att...6&d=1289575174

 

I think the manifold is nylon reinforced plastic. Get a rod of the same material and the correct adhesive.

http://www.rplastics.com/plasticrod.html

http://www.ridoutplastics.com/adandcem.html

 

personally i would try and drill the first 1/2in or so out so its a perfect circle and use a threaded pipe plug in it and seal it with teflon tape