Have a 2000 legacy manual tranny that has an ej252 engine that needs to be replaced. What year engines would work? Does it matter if it is off a car with a manual or auto tranny? Is there any parts that would have to be taken off the old engine to go to new one? Any info greatly appreciated. Thanks.

Why is the motor bad? Is it not repairable? Sometimes repair is a better option on this motor.

 

Any Ej25 from 2000-2004 will work. So by that definition MT or AT does not matter.

 

1999 Foresters (and I believe Impreza RS only) will also work, but those are the only models from that year as the other ones got the earlier version EJ25.

 

a 1999-2002 EJ22 would also work (and you wouldn't have to worry about replacing the engine again because it's a better motor )

 

There are a few cases where the cam and crank sprockets have to be swapped out, so hold on to your old engine just in case but I would expect that more in EJ25 - EJ22 swaps.

 

I'd recommend new timing components on any used motor, particularly these interference jokers.

 

Also - keep in mind that 2000-2004 EJ25's require the Subaru coolant additive, be sure to add that once it's installed and fluids are filled.

 

2000-2002 EJ25's were under Subaru's extended headgasket warranty due to that issue - might want to try to find one that's already had them done or plan on doing them before installing the engine. You can look externally to tell if they've already been replaced before. Replacement generally solves the issue.