nelstomlinson Posted April 27 Share Posted April 27 What is this thing on the back of the intake manifold? It's a '95 Legacy wagon with automatic. We're trying to swap in an engine from a '96 Legacy with a manual, and it doesn't have this excrescence on the manifold or the hole in the head for that copper pipe to thread into. We're going to swap the '95 manifold onto the running '96 engine, but there is no way we can install that copper pipe onto the '96 head. So, what is this, and can the '95 with AT work without it? can we just put a plug in that thing where the copper pipe goes, and live without it? The thread where I'm documenting the swap is here: Had to delete the picture there to make room for this one. Link to comment Share on other sites More sharing options...
moosens Posted April 27 Share Posted April 27 This is right along the lines of what I had to do dropping a 2000 Legacy engine into a 2003 Legacy. They made the first two or three years of that era with the EGR but didn’t for the last two. Or the other way around. On that one, as you should do, keep the original intake. You’ll have to get the drill and tap for that EGR pipe. Don’t drill too deep. Take the other one out and measure that depth and put some tape on your drill bit as a marker. I think it’s an M22 x 1.5 but double check that. I might have that set still. I had loaned it but I think Jesse gave it back. But for me to find it right now would be tough. Otherwise I’d mail it to you. I had my daughter get it from Amazon and it was like $16 for the set. Use a smaller pilot drill first. Link to comment Share on other sites More sharing options...
88SubGL Posted April 27 Share Posted April 27 Wow! That’s a pain. Link to comment Share on other sites More sharing options...
nelstomlinson Posted April 27 Author Share Posted April 27 So that's for EGR? That means I can just plug the hole and be happy, right? Link to comment Share on other sites More sharing options...
bushytails Posted April 27 Share Posted April 27 Yes. That's the EGR valve. You can definitely run without it, and some choose to do so. Happy would depend on whether you're OK with a permanent check engine light, the emissions laws in your state, and your comfort with increased NOx emissions. Link to comment Share on other sites More sharing options...
lmdew Posted April 27 Share Posted April 27 I've left the valve and have tapped into the airbox. It works as well. Link to comment Share on other sites More sharing options...
nelstomlinson Posted April 30 Author Share Posted April 30 Imdew, sounds like you're just grabbing filtered air from wherever, right? Link to comment Share on other sites More sharing options...
Numbchux Posted April 30 Share Posted April 30 On 4/27/2025 at 6:06 PM, lmdew said: I've left the valve and have tapped into the airbox. It works as well. You connected your EGR pipe to the airbox? Um..... Link to comment Share on other sites More sharing options...
wtdash Posted Monday at 09:25 PM Share Posted Monday at 09:25 PM And/or try this: Link to comment Share on other sites More sharing options...
lmdew Posted Tuesday at 12:53 AM Share Posted Tuesday at 12:53 AM Yes fresh air from the airbox. I've tapped into the 1" dia hose going to the IAC and also directly into the airbox on cars that do not have the large IAC hose. Link to comment Share on other sites More sharing options...
Numbchux Posted Tuesday at 09:51 PM Share Posted Tuesday at 09:51 PM 20 hours ago, lmdew said: Yes fresh air from the airbox. I've tapped into the 1" dia hose going to the IAC and also directly into the airbox on cars that do not have the large IAC hose. So when the EGR valve opens, the engine revs up? It's supposed to go to the exhaust... I'm confused Link to comment Share on other sites More sharing options...
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