upper egr seal and o-ring

[niterider]

i have a vacuum leak at my intake plenum & upper egr tube. i tore the heavy o-ring that only comes with a new upper tube. i can get the upper seal at a local dealer for under $9. i tried the best fit o-ring and rtv friday night @6pm but after a few days it was leaking again. any ideas for replacing the o-ring? its coding too lean bank 1&2. same as before i found the torn o-ring.

 

[Toms01PSD]

Try using wheel bearing grease or petroleum jelly. Coat it around the ring and put a little bit in the port on the intake where it'll slide over. I had the same issue as you when I put mine back together. By the way, I had to get that green o-ring from the dealer.

Note: You don't need a whole lot, just enough to lubricate.