want to swap a 2.2l out and put in 2.5l both 1998

[jbowone]

I have a 1998 legacy brighton with a bad 2.2l motor and manual trans.  

I also have a 1998 legacy gt that has been wrecked with a rebuilt 2.5l and manual trans

 

I would like to know what kind of problems I might have if I put the 2.5l in place of the 2.2l

Some of my concerns are first the wiring for the motor, will it match, also brain, can i just unplug one an change the other on in, and also exhaust headers are they the same or would I need to change them.  

 

What things would need changed and how much of a job is this.  

Is this something I should consider as i can by 2.2l engines cheaper than the 2.5l so should I just go that route.

 

any one that has done this or knows anything that could help me is invited to do so.  thanks

 

jbowone

Edited February 1, 2016 by jbowone

[86BRATMAN]

Straightforward swap, it'll all plug in and operate fine. You will need to swap the exhaust manifold over with the engine, for best performance you should also swap the ecu from the gt.

[jbowone]

Straightforward swap, it'll all plug in and operate fine. You will need to swap the exhaust manifold over with the engine, for best performance you should also swap the ecu from the gt.

Do I need to swap the brains (ecm) for correct values and will it plug in no wiring changes

[86BRATMAN]

The ej22 ecu (ecm, brain, whatever you want to call it) will run the ej25, but it will be down on power from what it's supposed to have. The ecu swap is simple as they both use the same plug.