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Old 06-07-2018, 01:10 PM   #101
wtdash
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Quote:
Originally Posted by supposed2badaily View Post
Does anyone have some good info on swapping an ej255 into an older legacy chassis? (2000 - 2004) I'm trying to get an idea of which engine I am going to use. I was thinking a 2006 WRX would be my best bet but does any other year ej255 offer better performance or better swappability?
Is this a TURBO swap, too or just the engine? IF the latter, don't bother, not worth it, why bother, what for, etc.

Otherwise, do some Searching on here or RS25.com. The impreza RS will have the same setup as that Legacy for a turbo swap.

BTW, you'll love the harness swap it's heaps of fun.
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Old 11-05-2018, 09:23 AM   #102
norco1989
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I have a 2006 legacy 2.5i with rod knock was trying to find out if I can swap the block from a 2005 outback 2.5i and has anyone done it if so what else do I need to swap. Please and thank you
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Old 01-21-2019, 02:27 PM   #103
kjrcace
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Default 2001 RS ej2.5 going in a 2002

Here's my sad tale.
looked and looked for a 2.5 RS coupe 99-2001 found 2001 mint condition with 40k miles. Bought it last feb. Always loved their look but settled for this 4 door since it was so good. Thought it would be a great backup car and for my daughter to drive to school, hopefully college too. Big surprise she was tagged in the rear in the 3 oclock 500. Nobody was hurt but big surprise totalled. So off I went on the hunt for another suby. Found a 2002 outback sedan for cheap. southern car but has oil leak and questionable motor history. I'm wanting to swap the 2001 RS ej2.5 phase II into the 2002 Outback sedan. According to all I've read they both have the ej 2.5 phase II. I've also been reading that many people have swapped the ej 2.2 into these because of head gaskets. If that has been done what issues might I face going back to the ej 2.5 ?
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Old 01-28-2019, 09:49 PM   #104
ludasram
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Not too knowledgeable about swapping and stuff, but I recently got a 1998 2.5rs, with a EJ25D (DOHC) engine, with 160k miles. I think it is now suffering from rod knock now however. What are my options?

I am thinking of swapping engines but I am not too sure which ones fit. Can I swap from a DOHC engine to a SOHC engine? I'm not too interested in turbos or anything, but is a JDM EJ20 SOHC a valid replacement? When I look up EJ25 engines, JDM Motors says it is a replacement for the 2.5L engine but I am not sure. Which ones fit that also don't suffer from the head gasket problem that plagued a lot of the RS's?

Is the last option just to rebuild the engine? Thank you.

Last edited by ludasram; 01-28-2019 at 10:20 PM.
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Old 01-29-2019, 12:20 AM   #105
wtdash
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Originally Posted by ludasram View Post
Not too knowledgeable about swapping and stuff, but I recently got a 1998 2.5rs, with a EJ25D (DOHC) engine, with 160k miles. I think it is now suffering from rod knock now however. What are my options?
This is covered on multiple sites, so please get your google-on.

And read THIS.

The main issue - i believe - w/the JDM SOHC is that the intake manifold and wiring harness won't work well w/your RS. and won't have the EGR.
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Old 06-10-2019, 11:15 AM   #106
SPENCETHEKID
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I have a 97 impreza with phase 1 EJ22x (threw it self out of time) and im wanting to swap with a phase 2 EJ253 i already have.

after searching page by page of fourms i cant find any information on what i would need to do to swap it these so if anyone has any information on this i would take anything.
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Old 07-01-2019, 05:45 PM   #107
baxterts
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Default Looking for some help with doing a motor swap on my 2011 wrx

Iím new to Subaruís and I just bought a 2011 wrx premium 2.5, and I have the active valve control on the intakes I believe. But sadly #3 cylinder is low on compression, I found a low miles EJ255 DOHC out of a 05 legacy, is anyone able to tell me if that motor will swap into my car? Are the sensors that need to be swapped, will I need to use my heads off of my motor? Or should I just look for a motor closer to my year? Thank you for any advice in advance.
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Old 07-01-2019, 06:41 PM   #108
wtdash
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Read this: https://en.wikipedia.org/wiki/Subaru_EJ_engine#EJ255

The LGT 2.5 is lower compression, and probably does NOT have the air pump yours does if using the full long-block.

But throw your WRX's Intake Manifold on it and it should run.

I'd suggest getting a tune (open-source or Cobb) to dial it in - due to the different engine and lack of air pump.

Or just use the shortblock. It'll still be slightly lower compression, and there may be a few different ports but should be covered on here.>>>>>

>>>You'll NEED to do some info-gathering if you're going to tackle the swap. Otherwise, find a good local Subie shop (not a dealer - they won't do swaps) for a reference.

Also, I'm not a fan of used Subaru turbo engines. I'd prefer to buy a new shortblock ~$2K and stick it under your heads after they've been R&R'd.

And do a Leak-Down test (yes, $$) but it'll tell you more precisely where the Low Comp on #3 is from.
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Old 07-31-2019, 09:45 AM   #109
Shadow.Subie
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Default 07 2.5i to 05 STi full swap questions

So Iím in the middle of doing a complete 05 STi swap into a 07 Impreza 2.5i and I have a few questions about wiring. Most of the wiring is already in place, I have a 05 donor car so instead of getting the harness merged, I took every inch of wiring out of the 05 STi. The only wiring I havenít gotten to yet is the fuel tank wiring and thats where Iím getting a bit confused. I read on another thread that if you swap out the fuel sending unit, you donít need to swap out the harness for the fuel tank, but the STi R180 rear differential has the temperature sensor, but is that the only difference? Is there a plug that I could plug the rear differential wire into? Just a plug that isnít connected on the Impreza harness? Do I need to swap the whole fuel wiring? What about the tank?
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