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Hey Suba-Dudes,

My mates 91 Lib's moter has died its final death. Now I have sitting in my shed a 2002 EJ25 from an Impreza with ECU and Harness which has got less than 60k on it and we were wondering how difficult it would be to drop into the Lib? Easy job or total nightmare? All opinions gratefully recieved.

Cheers,
Corax.

Not hard, its pretty much the same frame/crossmember, it has between EJ22 and EJ25, all you need is to change the loom over. Exhaust ports MAY be the same but i doubt it...

That EJ25 engine has 8 bolt, and EJ22 liberty has 4 bolt - big deal really and it will line up. I recommend you to remove engine & gearbox attached and put gearbox behind EJ25 and put it back in.
Cheers
AP

talk to Al at amauto.com.au

they can supply the modified loom for you. the rest is bolt in

I would put the 91 throttle body and engine loom on the 2002, swap the cam and crank sensors and just drop it in. It will run fine with the 2.2 computer.

Outback bloke wrote:I would put the 91 throttle body and engine loom on the 2002, swap the cam and crank sensors and just drop it in. It will run fine with the 2.2 computer.

Thats another way of doing that, if it was me I would do that task ( that is why i didn't say at the first place above because its slightly complicated task and its easier to swap the whole loom over but i'd do that above. )
Cheers
AP

I can see 3 options.
1. Use the complete EJ25 motor + ecu wiring loom etc as vincent mentioned. This is probably the most difficult + time consuming option.
2. You can change the two sensors and plug the EJ25 into your existing loom as AP and OB suggested. This would have to be the easiest, quickest method.
3. EJ25 short block bolted to your EJ22 heads/intake manifold running the stock EJ22 loom/ECU etc. This will give you a high compression (11:1 CR) N/A motor that will plug straight into your car. Fit new 3 layer EJ25 head gaskets while your doing it. I'm not sure if there's anything on a EJ25 SOHC motor worth checking while it is out of the car, but with 60k miles i wouldn't think there is much wrong with it. This is still a weekend job if you know what you're doing, and i think has the best end result. [Edit] - you need to drill out water passages in the EJ25 head gasket to suit the EJ22 head.

If you're interested in the frakenstein motor check out http://forums.nasioc.com/forums/showthr ... ads&page=9 I'm researching this at the moment. From what i've read guys with this combo still get good fuel efficiency (8ltrs/100km highway to 10.5 litrs/100km around town).

Another frankenmotor link http://forums.nasioc.com/forums/showthr ... 352&page=2