Need help Identifying short block
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This is a discussion on Need help Identifying short block within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have a short block that I'm planning on putting in my 02 Subaru. I was told it was an ...

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    Need help Identifying short block

    I have a short block that I'm planning on putting in my 02 Subaru. I was told it was an STI short block but not sure on they year. Are there any markings on the block that can help me determine what year this block came from? So I know what parts to order as I am putting it together, or is there no real big changes between the years?

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    Registered User lytlec's Avatar
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    No changes as far as I know. It should say EJ25 I think.
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    Thanks for the reply. I'm going to try to get this car up an running as soon as I can.
    Anything I need to look for while shopping around for heads to put on this block?
    Last edited by dash05; 01-30-2012 at 04:06 AM.

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    Admiral Ackbar the 1st mycologist's Avatar
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    I think both the WRX and the STi and possibly even NA 2.5 are all stamped ej25. Some say the pistons are different though.

    To run it in a 2002 you use 2.0l WRX heads. You need to read a bunch about compression etc. etc. - search for "hybrid build". A bunch of people here have done it.
    Last edited by mycologist; 01-30-2012 at 06:21 AM.
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    thanks! I'll definitely look that up.

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