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Old 01-22-2004, 11:25 AM   #1
Max Umbarger
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Default Would the EJ22 bolt into an EJ18 as easy as the EJ25 bolts in?

I have the FWD 93 Impreza. In college= no loans= low income. I know people have put the EJ25 in place of their EJ18 with the same ECU. What about an EJ22? I have a EJ22 NA laying around from a 94 legacy (OBD-I) It would probably be a little quicker than the EJ18 especially with the FWD, but the fact is that my EJ18 has 210,000 miles on it and it is really starting to go.

Max
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Old 01-22-2004, 12:15 PM   #2
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Default Yes

This should be an easy swap especially where they are both OBDI cars. I don't know if the ECU's will just swap over but if not the 2.2 will run with a 1.8 ECU
Joshua
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Old 01-22-2004, 07:31 PM   #3
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That EJ22 will be very easy. Might even be able to use most of the same wiring.
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Old 01-23-2004, 08:47 AM   #4
Max Umbarger
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Default hi!

I figure if an OBD-II EJ25 bolts in nice off the EJ18 ECU, a 94 Legacy EJ22 OBD-I EJ22 should right?

I'm sure there will be minor differences just as the EJ25 tho 2.

Max
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Old 01-23-2004, 11:41 AM   #5
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I dont have much EJ22 experiance but heck, see if the 2.2 ECU plugs in, it just might. That would be cool. Otherwise being an OBDI 2.2 the 1.8 ECU should be able to control it pretty close. It to me looks like a pretty straightforward swap that will get you a lower mileage engine and a bonus 20HP or so. Go for it and let us know the results!
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Old 01-23-2004, 12:08 PM   #6
Max Umbarger
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Right!

I figure it should work, just because I would think the EJ25 would be more complicated, and quite a few people have done it. Iknow it isn't just the size of the engine either, but both being OBD-I and close years, EJ-18 MY93 & EJ22 MY94 there were no big changes in these years as far as improvements I think. I suppose I 'll figure things out.

Unfortunately there are no performance shops in corn-land Illinois, so I don't know whether to tell the shops it is a different motor or not, because if I tell them the prolly won't even touch it. I would **** if they called me and told me the engine don't work. I would just tow it home and toy with it then I suppose!

thanks for the input

max
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Old 01-23-2004, 04:47 PM   #7
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Where in IL are you??
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Old 01-24-2004, 12:58 PM   #8
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Ottawa near junct. I-80 & I-39

max
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Old 01-24-2004, 10:03 PM   #9
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Just wondering cause I am currently in Dubuque. Hey if you can get access to a garage, engine hoist and some basic tools let me know ill help you. It can be done in a weekend.
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Old 01-25-2004, 02:48 AM   #10
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teh EJ22 ecu is a 4 plugger. impreza EJ18 is a 3 plugger, ecu wont plug in. i tried...

regardless, you should be able to do it in a weekend. easy swap, go for it. between 2 engines u have pretty much all needed

h
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Old 01-25-2004, 01:47 PM   #11
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should be able to just do some work with the sensors or move some sensors form the EJ18 to Ej22 to make them fit the EJ18 ECU right

max
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Old 01-25-2004, 02:07 PM   #12
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My bet that is since its a 94' 2.2 the sensors will be pretty much the same and the 1.8 harness will just plug right in. Only thing i cant think of off hand is the Ex. manifold. Is the 2.2 a single exh port per head? cause the 1.8 is dual. Means you might need a 2.2 exhaust manifold. It sounds like a very easy swap.
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Old 01-29-2004, 01:03 PM   #13
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The 94 2.2 should be a dual port head so the exhaust manifold should bolt up.

I just did this swap on my 93 1.8 and put a 95 2.2 in it. Take the intake manifold off the 1.8 and just swap it over, then put the motor back in. You'll have an extra plug for the knock sensor, but don't worry about it. Leave the 2 sensors in the 2.2 block. (crank and cam)

That's it. I'd recommend doing the clutch while the engine is out as well.

The whole swap with engine and shipping AND fluids probably set me back around $400.

Chad
93 2.2T
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Old 02-25-2004, 09:26 PM   #14
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Hey folks. I'm about to buy a '94 Impreza L FWD wagon with about 200 gozillion miles on it. Right now I have a '91 Legacy L with a bad tranny, but a motor that runs like a champ. I'm considering doing this same swap, and possibly trying to do a build-up on the 2.2 before it goes in there.

Here's the kicker, though. I just put a bunch of new parts in my Legacy, like axles, cv joints, struts, tires, and a host of other parts. How many of these things can I take with me when I do this swap? Will the axles just pop right in, or will they be too long? I'd imagine if I do any build up, the newer axles would be better suited to handle the stress. I'd also guess that the 1.8 axes are probably not as chunky. I dunno, though, maybe they are?

I'd also like to eventually convert this car to AWD, but I'm not going to even start asking about that in this post. SO, if someone could direct me to the proper place, I'd more than appreciate it. Thanks.
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Old 02-27-2004, 05:55 AM   #15
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chip4761

A MY91 Legacy AWD wagon was the mechanical donor for my MY93 Impreza 1.8L FWD. Everything bolted in with no problem except losing a little skin off my knuckles. The AWD part, except the gas tank, was the easiest thing about the swap. Just bolt the stuff in and get an alignment.

Wiring in the engine is another story. Luck.

Mike McBride
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Old 02-27-2004, 10:16 AM   #16
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If I were to use the AWD parts from an earlier legacy, would I have to also use all of the suspension components, or could I somehow retain the rear struts and all that? I know the lower end of the rear suspension would change, but would the strut mounting points be the same? The reason I ask is because I know struts for early 90s legacys are ridiciulously expensive, and any sort of performance suspension parts are virtually non-existant.
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Old 02-27-2004, 11:51 AM   #17
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Ha ha. Funny story. My dad was going to pick up that Impreza for me, but the dealership sold it to someone else after having told me it was mine. Bastards. No worry, I found another one, that's already AWD. We'll see how that pans out.
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