hey good to see you again.
there's not so much conflicting information as there are so many different ways and combinations. heads, blocks, phase I, phase II, EGR or not, exhaust ports...etc. most of it depends on you, what you're wanting or willing to do.
you'll have to let us know what exactly you have - which you've told us except that you haven't mentioned if your 97 has EGR or not (the 99 most certainly will i believe, most EJ25's do, EJ22's are hit or miss and no 100% way to tell without looking. and how much work you want to...or not to...do.
you're doing the most difficult EJ swap there is because a 99 Forester is a Phase II EJ25 and the EJ22 is a Phase I so electronics and such are not compatible.
yours is not an easy swap - so you can ignore all the "plug and play" options. if it was a 1998 forester then it would be plug and play, the Ej22 would plug right into the EJ25...not so with 99's.
as ivans said the simplest route is to swap the EJ22 block into the EJ25 vehicle - then everything is simple and no work arounds needed. of course EJ25 heads suck but do it right and you won't have to touch them again for 100,000 miles hopefully.
or follow Gloyale's lead on actually swapping in the EJ22. if you swap the entire 97 you'll also need the exhaust manifold as they are single ports and if it's not EGR and the EJ25 does have EGR - then you'll have a check engine light until you work around that code, which is possible, someone just figured out a slick and simple trick a couple weeks ago finally after all these years.
Hey guys...trying to get up to speed on New Gen engine compatibility....my EA82's are slowly disintegrating, and the new ones are kinda nice too...
Read several posts including those in the archived section. Not all the info is consistant, and some of it is conflicting. Can anyone point me to a definitive write-up on this topic?
Specifically, I am looking to revive a 99 Forrester A/T with a blown 2.5. I have a good 97 Imprez 2.2 available, but am not ruling out other versions of the 2.2.
I'd rather stay away from 2.5's due to high cost, and poor reputation.
Any suggestions would be appreciated, thanks John
Edited by grossgary, 01 May 2013 - 11:33 AM.