Join Date: Nov 2011
Location: near Knoxville, TN
Car: I has car.
Feedback Score: 3 reviews
Ok, here's the skinny:
00-01 share timing components. 02-04 are different in that regard. Easy to fix that, tho. . . just use your 03 LH cam sprocket and crank sprocket and intake.
00-02 are non EGR. 03-04 are. That's a little harder to work around if you don't want to swap the LH head. . no easy way around the intake debacle. I suppose you could swap ECU and harnesses but that is a very un-fun process just to work around that issue. Idle air metering mechanism and a host of other things are different on the 02+ motors as well, best to stick with the ECU/intake/harness that came with your car and make the motor fit it.
It has been suggested by others that you can run the EGR valve without tapping the head as long as you can do something to simulate 'flow' in the valve. One of the other members detailed a way to install a hose to the EGR valve using air sourced from a crankcase vent. Don't know if that'll work or not, just relaying info.
Personally I'd just swap the head and be done with it. 01's still have headgasket issues, might as well fix it while the motor is out of the car.
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lockmedicben AT gmail
I seem to get a lot of "will xx fit in my car?" emails. . . I'm not the authority on everything Subaru, so I very well may tell you the wrong answer as there's nobody else to check me. Please search or ask via the forums first. . .when I answer you via email, it never gets posted and nobody else can confirm or refute my answer.