Replacing EJ22 with EJ18 - what to do with this pipe?

[AdventureSubaru]

First Ej18 swap. Done a few 2.2 swaps to replace 2.5s but got a 96 Impreza outback with a 2.2. Existing motor has a botched head gasket job that is leaking bad and some tapping that has yet to go away and may or may not be a noisy HLA.

 

Local yard had a 95 Impreza with EJ18 with only 82,000 miles for $200. It's stilling in the driveway with intake manifold pulled and almost ready for to pull the motor and drop this one in tomorrow on my day off.

 

 

This is what I wasn't sure about. Not on any EJ22 I've seen and not mentioned in the writeups I've read. What is it? Do I cap it off or what do with it to drop in place of an EJ22?

[turbosubarubrat]

It has to do with emissions i would just block it off. That's what i've done on ea81's and ea82's. From what i understand it has do with the exhaust recirculation system to burn off fuel vapor left after combustion.

[idosubaru]

i've done it to EJ18's before, just block it off on the engine side like he said.  if you look closely i think it's just the exhaust there so blocking it off makes it just like an EJ22 - no hole. 

you won't use the intake side because you'll use the EJ22 intake manifold on the EJ18.  swap knock sensor from EJ22 to EJ18, the hole should be there and threaded.