2000 Impreza 2.2 swap into 2000 leagacy 2.5 car?

[hogweed]

i bought the 2000 impreza (lightly crashed, salvage certificate) a couple years ago. i fixed the damage but it has some more rust than i like and i have been undecided about going the rest of the way to get it titled again.

i recently acquired a 2000 legacy outback with a seized 2.5 in it and thought i might be able to swap the 2.2 from the impreza into the legacy but i remember it gets a little more complicated as the years go up.

any help/suggestions would be appropriated.

 

both are 5 speed cars

 

thank you

gregg

Edited February 18, 2016 by hogweed

[matt167]

Bolt in and go. Swap cam pullies in case the sensor wheels are different. Swap exhaust y pipe and it will run. That said, its minus 30hp for no real reason. The Ej22 after 1998 has no durabilty advantage over the SOHC 2.5. They are basically the same

[johnceggleston]

what he said.

if the crank sprocket looks different, swap it.

i would swap the driver side cam sprocket just in case.

once they are both off you can look atr  the back side to see if they are different.

but once off, it is no more work to swap than to re-install the original.

(TIP: break the cam shaft bolt loose before you remove the t-belt.)

the cam and crank signals MUST match the ECU,

and the ecu MUST match the wiring in the car.

so the sprockets are the easy step to ensure it will work.

 

i would probably also swap the intake manifold.

you may not need to, the sensors and harness may be the same,

but again, if you do need to,

easier to do it with the engine out of the car.

 

after that,

the ecu thinks the original ej25 is in the car.

 

good luck.

[AdventureSubaru]

I did this swap in reverse - 2001 outback 2.5 motor into a 99 impreza. As mentioned - keep the crank sprocket and the drivers cam sprocket from the original car and swap it onto the new motor. Ditto to the exhaust since the 2.2 is single port.

 

You'll see quickly by comparing intakes and the sensors on the top if it's MAF or MAP and such. I had to keep the original intake manifold and do a long block swap. Worked like a charm!