griffithbuilt Posted April 27, 2009 Share Posted April 27, 2009 I've got a 93 legacy with an EJ22 SOHC and it has developed a rod knock. I purchased a '99 EJ25 SOHC long block and I am contemplating simply swapping the long block into my car and using the EJ22 intake, ECU, Wiring Harness & Sensors. Is there any reason why this won't work effectively? Thanks, Jason Link to comment Share on other sites More sharing options...
GEE-OTTO Posted April 27, 2009 Share Posted April 27, 2009 I assume you did not get the ECU to the EJ253? it isnt as easy as using the harness the cam position sensors are different the compression ratio is different they are different engines. You will need to either the the harness and ECU from the donor car or research and see how others have done this swap Link to comment Share on other sites More sharing options...
griffithbuilt Posted April 28, 2009 Author Share Posted April 28, 2009 Now that I'm a little clearer on some of these discrepancies and have investigated the differences between some of the control systems I have a few more questions. No I did not get the EJ253 ECU, only the long block. Unfortunate, but I'll make due. Is it just a difference in the cam position sensor or the crank sensor as well? If there are differences, is it a difference in the actual trigger pattern? This seems a bit odd. Jason Link to comment Share on other sites More sharing options...
GEE-OTTO Posted April 28, 2009 Share Posted April 28, 2009 Now that I'm a little clearer on some of these discrepancies and have investigated the differences between some of the control systems I have a few more questions. No I did not get the EJ253 ECU, only the long block. Unfortunate, but I'll make due. Is it just a difference in the cam position sensor or the crank sensor as well? If there are differences, is it a difference in the actual trigger pattern? This seems a bit odd. Jason The EJ253 Heads are slightly different the "3" in EJ253 and the "1" in EJ251 denote the difference in some aspect of the engine there is a table that has all the differences I know 7 means STI 5 mean MPFI i forgot what 3 and 1 mean the cam position triggers may be different im not quite sure find that table and youll know quickly what you need to change but for the most part it is still a simple swap Link to comment Share on other sites More sharing options...
griffithbuilt Posted April 29, 2009 Author Share Posted April 29, 2009 Know where I can find that table? I've been looking around for it here, and on nasioc and also on the web. No luck Link to comment Share on other sites More sharing options...
GEE-OTTO Posted April 29, 2009 Share Posted April 29, 2009 Know where I can find that table? I've been looking around for it here, and on nasioc and also on the web. No luck http://en.wikipedia.org/wiki/Subaru_EJ_engine#EJ15 Link to comment Share on other sites More sharing options...
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