Had to remove the plenum so need to replace the gaskets that go on the copper air tube running from the base of the EGR mount to the intake plenum just behind the IAC.. Its the flexible copper pipe with gaskets on both ends. The question is, which gasket is which? One gasket has a large hole the size of the pipe id (about 1/2") and the other gasket has a small hole about a quarter inch right in the center of the gasket instead of the full size hole.. Does the small one go on the end at the EGR mount and the large one on the plenum end or the other way around? Or, does it matter at all...

Thanks....

 

Ive always put the gasket with the small hole at the plentum side of the EGR tube.

 

That's the way I did it last time but wasn't sure then either... Just looked like the one with the small hole was a higher temp gasket so was thinking it might need to go against the EGR mount...