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Old 04-02-2006, 11:33 PM   #1
t3hWIT
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95 STi RA (rhd)
98 Tacoma (300k Club)

Question 1.8 -> 2.2 swap, want to get all bases covered.

I drive a 1995 Subaru Impreza L, 5spd, AWD, OBD1, 110k miles, and I am developing oil leaks everywhere.

Back home, I have a 2.2 still in my old car, a 1997 Subaru Impreza L, 4EAT, AWD, OBD2, knock sensor, 113k miles, no major leaks, and no ECU.

I am planning on swapping the 2.2 in my car this summer, but I have quite a few concerns, and some answers seem to contradict others, if I even get an answer. Here they are, in no particular order:

1. Will the 1.8 flywheel and a 2.5 clutch/pressure plate work fine? edit: YES
2. Will the 1.8 ECU run the motor decently? edit: YES
3. Is this plug and play, or will I run into wiring problems due to the differences between cars? edit: Wired in coil pack (3 wires)
4. What about anything regarded to EGR/knock sensor (as my 1.8 doesn't have the later?) edit: Use 1.8 intake manifold and harness
5. Is there going to be any problems related to the OBD differences? edit: No.
6. Is it true that I will have to use the 1.8 intake manifold? See #4

Is there anything else that I should worry about? I am asking this all as this car is my daily driver, and I can devote little more than a weekend to do the engine swap, so I would like to have everything figured out beforehand and not have any surprises.

thank you all
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Last edited by t3hWIT; 05-17-2007 at 07:44 PM.
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Old 04-06-2006, 08:46 AM   #2
t3hWIT
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bump for questions not yet answered.
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Old 04-06-2006, 01:04 PM   #3
drewdogg
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1. As all engines fit all trannys, i'll assume yes
2. Yep, no problems
3. Will have to use 1.8 engine wiring harness and sensors
4. 95 1.8 should have EGR, if 2.2 does too, use em, if not just plug in the EGR solenoids so the ECU thinks it's there
5. unless someone says differently, the OBD deals with the ECU, so it shouldn't be a problem
6. NO, but you'll have to use 1.8 throttle body
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Old 04-06-2006, 01:17 PM   #4
t3hWIT
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What do you mean about using the 1.8 harness and sensors? Can I just disconnect the 2.2 engine and put it in the 1.8 place, or does every single sensor have to be swapped? The 2.2 has a knock sensor, the 1.8 doesnt, as far as EGR goes, I'm not sure.
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Old 04-06-2006, 02:24 PM   #5
Matt Monson
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Missed this the first time around, good thing you bumped it. The EASIEST way to do this is to use the EJ18 intake manifold, complete with it's wiring harness and sensors and bolt it to the Ej22. This will provide the best driveability without any special modifications.

If you want to use the Ej22 manifold, you will need to sort out the IAC (which is where the 1.8l TB comes in) and EGR, and will still need to move the Ej18 engine wiring harness over to the manifold. Don't bother reinventing the wheel. Just unbolt your Ej18 manifold and bolt it to the Ej22 engine. Don't worry about the knock sensor. Your EJ18 ECU don't recognize one, so don't use one...
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Old 04-06-2006, 02:55 PM   #6
t3hWIT
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Ok, what about the injectors, or are they same? So, let me get this straight. I use the complte 2.2 bottom end, and the 1.8 manifold, with its harness, and that will all plug in ok, such as the cam sensors?

I apologize if I keep asking the same questions, I just want to make sure I understand all this before I tear anything apart and get stuck with no vehicle. As far as new intake manifold gaskets, 2.2 gaskets or 1.8?
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Old 04-06-2006, 03:02 PM   #7
Matt Monson
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injectors are the same. gaskets are the same. cam, crank coolant and most every other sensor is the same. There are a couple sensors the Ej18 has that the Ej22 does not, but they reside on the manifold and you will bring them over with you. Reconnect the vaccum lines that they use and you are good to go...
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Old 04-06-2006, 03:22 PM   #8
t3hWIT
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Thanks for all the info, I plan to do this in late May. I need to get a full time job for the summer, and I want to have this done and out of the way so that if I tie up the car, the world's not going to come to an end or anything.
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Old 05-17-2007, 04:30 PM   #9
natton
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Default 97 Subaru Impreza Oil Burning

Hi
Maybe someone can help me out I have a 97 Impreza 2.2 Lt engine
I seem to have a problem with oil burning off through the Exhuast no pyshical Oil leaks Changed Head Gasket already everything is tight but it stills burns oil really bad any suggestions
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Old 05-17-2007, 06:15 PM   #10
Matt Monson
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bad valve guides or bad rings. Do a leakdown test...
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