I dont know what engine will work!
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This is a discussion on I dont know what engine will work! within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; I recently purchased a 2002 WRX Wagon without an engine or transmission. I am looking to purchase both and make ...

  1. #1
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    I dont know what engine will work!

    I recently purchased a 2002 WRX Wagon without an engine or transmission.

    I am looking to purchase both and make a fun little car!

    I see a lot of engines for sale on the electronic bay dot com - EJ20 2.0 DOHC Turbo - but they arent necesarily for my year. I need to know which engines will work with my car and wire harness. I dont mind doing some work. If i got an engine from a 1996 WRX would i be able to make it work without much issue?

    There is also an engine or two that i have seen that say 1999-2005 but i dont think that is a year range when where the engines were the same..

    what do you guys think? I am new to the WRX world. This is my first one

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  3. #2
    The Member michaelwfox's Avatar
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    Are you wanting to put the stock engine back in or do a full engine swap?

    Also are you in the US?
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    I dont mind doing some work but im looking at my most affordable option and i think that would be the stock engine. I think that would be the easiest option as well?

    I am in the US

  5. #4
    The Member michaelwfox's Avatar
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    Yeah putting a stock engine/trans will be the easiest option by far. Does the car already have the stock wiring harness/ecu?

    If so you can look for an EJ205 these can come from any 2002-2005 WRX. I would recommend trying to find a BA trans to match. The AA trans is said to be a little weaker.
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    So years other than that wont work? Would i have to change out the ECU and wiring harness?

  7. #6
    The Member michaelwfox's Avatar
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    Subaru changed engines in 2006 to a 2.5 liter. You can certainly use one of those if you wanted but, you will have to change wiring harness/ecu and the differentials I believe.
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    how about years like mid 90s

  9. #8
    The Member michaelwfox's Avatar
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    The US didn't get the WRX until 2002 so anything before then would mean changing pretty much everything.
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    Also - what about JDM engines?

  11. #10
    The Member michaelwfox's Avatar
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    Well technically every WRX engine is JDM because Subaru builds all their cars in Japan.

    I think what you mean is Japanese spec engines like EJ207 then that would also require modification.

    Basically anything other than a EJ205 will need modifying. It will not be plug and play.
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  12. #11
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    insteresting - ok thank you good sir!

  13. #12
    Luke Skywalker Mikie13's Avatar
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    Yes, the stock engine would be the easiest. You COULD do a Hybrid with any 2.5L block as long as you had 02-05 2.0L heads attached (machined to match first)...but that might cost a bit more.

    But for the sake of not having to screw with the wiring harness or ECU, or with having to tune...finding a complete 2.0L long block would be the easiest and cheapest.
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