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Old 08-04-2008, 01:07 PM   #1
LegacyWRX
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Default ej22e in/ej18 out swap

Hey guys. Recently the clutch in my 93 impreza has started to slip, I dealt with it for a while cause I ain't got no money in the bank but its pretty bad now. I wanted to do a more potent swap but the time has come to do something. I'm going to put in a new clutch and short shift with some bushings and while the 1.8 is out I want to throw my ej22e from my 95 Legacy in there. I looked around but didn't find too much info on this swap.
I'm planning on useing the 1.8 ecu, I've read of people useing it on ej25 and having no issues so I don't see why it wouldn't work with the 2.2. I'm mainly wondering if I would have to swap over any sensors, any clearance issues, such as power steering lines ect. Or anything else I might need to know. I have the tools and experience I'm just trying to get my feet wet before I jump into this, Thanks!
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Old 08-04-2008, 10:35 PM   #2
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It is the same as the EJ25 swap. Literally....

Swap the engine harness from the EJ18 to the EJ22, then stick that motor in your car and plug it all back in. It doesn't get any easier.....In fact....it's so easy, don't forget to actually put the new clutch on!!!!

Jay
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Old 08-06-2008, 12:57 AM   #3
LegacyWRX
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Thanks Storm, That doesn't sound too bad as long as were not talking about splicing them together, right? Is it literally plug and play with the same connectors? I'm also a little concerned about putting an obd II engine into an obd I chassis. I'm guessing there will be some emissions stuff on the 22 that the 18 doesnt have, not sure what exactly.
I've been spelunking through the Nasioc archives a bit and found another option would be to just swap the intake manifold from the 18 onto the 22 and leave the harness as is. That actually sounds just as simple and this way I'd be sure I don't have to deal with any splice/soldering.
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Old 08-06-2008, 02:02 AM   #4
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It should be easy but not as easy as storm said since the 95 is an OBDII.

My opinion is that you take the 2.2 long block and just attach all of your 1.8 liter crap to the top of it.
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Old 08-06-2008, 07:23 AM   #5
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When I typed in to swap the engine harness, I thought it would be assumed that the sensors that plugged into that EJ18 harness would also go onto the new motor. Doing this essentially changes the new motor to whatever OBD version the old one is/was.

It literally is as easy as taking the electrical crap from the old motor, putting it on the new motor, and dropping it into the car.

To the OP: There is no splicing necessary for you. The coil, TPS, IACV, MAF, etc. are all the same.

Jay Storm
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Old 08-06-2008, 10:18 AM   #6
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LOL, i just recently did this swap in reverse. The 2.2 in my wifes everyday driver started talking some carnage at me so I pulled it out and put a 1.8 in. Basically I just swapped the intake manifolds and plugged in all the sensors. as far as I can tell there is no point in swapping the sensors themselves as they are all the same. Although, you will not be able to plug in the knock sensor because you '93 harness doesn't have a plug or pin on the ecu for a knock sensor.
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Old 08-06-2008, 12:40 PM   #7
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just swap the long blocks.. all 92-96 ej22s/18s watever are all the same.

<--rocking ej22t heads on an ej18 block with an ej18 manifold.
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Old 08-06-2008, 04:40 PM   #8
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Thanks for the input! I think I'm going to swap out the intake manifold and go that route. I'm useing my folks tractor shop some weekend and I have to have the car running by monday so I wanted to make sure I didn't have any snags or any fab work I didn't know about. Everybody seems pretty adimant that it is a straightforward swap so no worrys here.
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Old 08-06-2008, 05:06 PM   #9
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It is very straightforward. The EJ22 should have a knock sensor, but you can ignore it since your EJ18 ECU won't be wired for it, or be looking for it.

Jay Storm
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Old 08-12-2008, 02:01 AM   #10
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So I finally got around to wrenching on my car a bit, It's not quite done but the motor is ready to go back in. It really was as easy as everyone said, hah! Pics always help so I'll give a little walk through for the next person looking for swap info.
The old,

Disconnecting everything

This I was pretty curious about. Right below my hand you can see the lever that the clutch cable is connected too. But in my hand is another cable that is connected to the lever and goes to an valve in the brake system. You can see the cable goes under the egr valve from the left, comes out under the right side and goes to the valve under the brake master cyl.

My pop pulling the beast out,


Two junk engines with over 200k on them each equals one junk engine and a bunch of parts!

One little snag I ran into; the fitting on the egr tube was rounded off pretty bad on the 2.2 and an open ended wrench kept slipping so I cut it off, used the box end and used the egr from the 1.8.
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Old 08-12-2008, 02:02 AM   #11
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engines all dismantled and ready to swap manis over,

Heres another little deal I was wondering about, This is the 2.2 harness only had the crank sensor and what I think is a ground up to the top.

and the 1.8 harness had another little connector that went to the power steering pump. I'm useing the 2.2's PS pump which has no connector and the wire is just dangling. Maby it's just a low fluid level light? I'm not sure, I doubt it will be a problem but wanted to see what you guys thought.

Knock sensor on the grody azz 2.2,

Here's the last little word of caution for anyone who might use this thread for info; The 1.8's intake manifold will not go on useing the 2.2s A/C compressor! The 1.8's compressor has the lines going out off to the side;

And the 2.2's are both on the rear;

The manifold hits on the compressor juuuussssst enough to be a complete pita when you think your almost done. It's literally millimeters away from fitting! If you want A/C in your car, you will have to swap the pumps over. If your A/C is already messed up there is another solution;

Hacksaw!!!
Slap it all together;

My new old 2xxk motor!!!
Should be throwing everything in this weekend.
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Old 08-12-2008, 08:24 AM   #12
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For the items you had questions on......

First, the extra line from the clutch to the brake is for the "hill holder" feature. I've not dealt with them personally, but it is said to be easily bypassed or retrofitted when needed.

Second, the extra wires for the coolant temp sensor can be kept by simply swapping the crossover pipe.

Finally, instead of cutting ther AC compressor, I would have just unplugged the wiring harnesses from each manifold and swapped them. That way you keep the same manifold for the motor and just move a few sensors around to make everything fit again.


Good job so far. The real glory comes when you hit the key and it fires up like you've been gone on a weekend trip and just wanna go for a drive.

Jay
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Old 08-12-2008, 03:18 PM   #13
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Just to add to what Jay said, this swap is easier if you unbolt your power steering pump from the block and unbolt the AC compressor from the block and push them both out of the way when you pull the longblock. You don't empty either of them. You do not disconnect the hard lines that feed either of them. You keep those systems closed and never crack into them.

Not only is this easier, but you don't have to recharge your AC and you sitll keep your power steering level sensor functioning.

Lastly, while it is easier to just bolt the Ej18 manifold to the Ej22 engine, most of us are in agreement that the Ej22e manifold flows ever so slightly better than the Ej18 manifold, so it's an appropriate upgrade to make when doing all of the other work since it's only going to take you 20 minutes. This is doubly true since you get the injectors off of the Ej22 and arguably you are putting a new engine with lower miles into your car, so the injectors and any other sensors on the Ej22 manifold will be "fresher"...
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Old 08-17-2008, 07:41 PM   #14
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I'm in the midst of this same swap, and I'm running into one problem. The original car/engine was a '93 Impreza with an '00 EJ25 swap. The new engine is (I think) a '96 EJ22. I'm not 100% sure on the year, but it is a SOHC. I swapped the engine harness and repinned a few plugs to keep the EJ22 manifold, and now the snags come.

The throttle/cruise control cables won't fit properly with the bracket from the EJ22 or the EJ25 (too short with the EJ22, too long with the EJ25 one). Is there a bracket that'll work, or do I need to swap cables?

The second issue is the temperature sensor in the crossover pipe. I modified the original EJ18 harness to work with the EJ25 swap, which meant making that plug a 3-wire deal from the original 2-wire deal. Now the EJ22 has a 2-wire sensor again, which means another swap. Only problem is I can't find the thread that had the details for that. Thoughts?

The last potential issue: the brackets for the AC compressor are from the original EJ18. The lower sliding portion that "pinches" the compressor has three bolt holes; two that go through the compressor into the main bracket, one that goes directly into the block. That one going into the block doesn't line up with the actual threaded hole in the block. Any problem leaving that bolt out? The AC has a leak somewhere, so its not like I'd be using it anyway.
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Old 08-17-2008, 11:43 PM   #15
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1: Probably have to change the cables or move the actuator closer.

2: Unscrew the 3 wire coolant temp sensor and the little plug just next to it. Screw in 2 wire sensor and single wire sensor from the original setup if you still have them.

3: I've left that bolt going into the block out with no problems. You can open up the hole in that bracket, or leave the bolt out.....dealers choice.

Jay
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Old 09-02-2008, 01:52 AM   #16
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1. Change the cables: ok, but to what? Any thoughts or actual experience?

2. I would've done this had it occurred to me that there'd be a difference before putting the IM on. With everything assembled, I'm pretty sure I can't get a wrench in there to remove the sensor.

3. Great!
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Old 09-02-2008, 09:11 AM   #17
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Okay, I just went through the throttle cable issue. I was able to keep my original cable, I just needed to readjust the threaded end. I never had cruise, so I can't help on that, other than suggest it would be similar.

You may find that the IAC is completely incompatable, being a 6 wire stepper motor. Looking at wiring diagrams, a '00 EJ22 uses a 3 wire IAC, so you should be able to switch to that throttlebody and make it work. I haven't found one of these yet, but my eyes are peeled.

Yeah, it's a PIA to get to the sensors on the waterpipe....but the manifold isn't too hard to take off.....

Good luck,
Jay Storm
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Old 09-02-2008, 10:24 AM   #18
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Quote:
Originally Posted by Storm View Post
Looking at wiring diagrams, a '00 EJ22 uses a 3 wire IAC, so you should be able to switch to that throttlebody and make it work. I haven't found one of these yet, but my eyes are peeled.
You may be able to expand your search to other years. I was just roaming around the junkyard yesterday and found that very throttle body you described on an Impreza EJ22! The car was definitely older than 2000.
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Old 11-18-2008, 08:33 AM   #19
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Update: I got the existing throttle cable to work, but it's ugly. Swapped in the EJ18 TB (WAY smaller ID, fyi) and things lined up ok. Swapping out the water temp sensor was easier than I thought as well, and that's done too. Now I'm running into another problem: the car won't start.

It'll crank and crank till the battery dies, but never kick over. These are a few things I noticed:
-Injectors aren't opening on passenger side, fuel pressure building up in that line before the FPR.
-Fuel pump remains turned on and maybe in "priming" mode or whatever, even after key turned to off and removed from ignition. Only way to turn off is by disconnecting battery.
-Coilpack gets warm (not hot, but warm), and stays that way until battery disconnected.

The details about the car:
-'93 Impreza
-'96 EJ22
-'00 EJ25 Coilpack

I'm going over my grounds today, but I'm pretty sure they're all wired up correctly. Is there any problem with compatibility between either the coilpack or injectors? I swapped plug ends on the engine harness to keep the EJ22 injectors.
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