"What's Under the Hood? - Subaru Engine Swap Thread"

[Belodedovk]

Yo, fellow mechanics! I'm planning to swap my Subaru's FA20 engine for a EJ257 (2.0L turbo) and I'm looking for any advice or guidance on what to expect. Has anyone here done this swap before and what were some of the challenges you faced?

 

[ruphej]

Just got my hands on a 2.5L EJ engine from a donor car, and I'm excited to see how it'll fit in my '06 WRX. Has anyone worked with the EJ257 before? Any tips for mating the new engine to my existing transmission?

 

[vinzard]

"Hey guys, I've seen some guys attempt a 2.0L Subaru Flat4 swap into a WRX. Not saying it's impossible, but you'll need to be prepared for some major cooling system and transmission upgrades."

 

[lssmpvps]

"Personally, I've worked with the FA20 engine from the BRZ and it's definitely doable for a swap, but you gotta be prepared for some major modifications. I've heard the FA24 engine from the new WRX is a bit more plug-and-play, but who knows if it'll fit under your hood. Has anyone else done a swap with this engine?"

 

[ananimys_hax]

"Hey guys, I've been following along and I'm pretty stoked to see the interest in swaps. Just a heads up, if you're planning to do a Subaru swap, make sure you research the engine mounts and transmission adapters, as those can be major pain points. Anyone have experience with EJ25 swaps?"

 

[ANKOV]

"Honestly, I've seen EJ engine swaps done in Subaru Bajas, but you gotta be careful with the wiring harness. I'd love to see a build thread with more details, pics, or vids. Has anyone done a swap on a newer model like a BRZ?"

 

[as1111]

"just a heads up for those planning on swapping in a Subaru engine, make sure you research the transmission compatibility too, might not be as straightforward as just swapping in the engine. I've heard mixed results from people trying to pair the 2.5L FA with non-Subaru boxes. anyone with experience care to share some insight?"

 

[Varlock2006]

"Hey OP, I've done a few engine swaps myself and I gotta say, Subaru's powerplants are pretty sweet. I swapped my old Forester's 2.5L for a 2.0L turbo from a WRX and it's been a beast ever since. Anyone else done a similar swap?"

 

[tecktonik fan]

"Hey guys, I've done some research on swapping a Subaru engine and I'd recommend checking out the EJ25 for a 4-cylinder or the EJ20 for a 6-cylinder. The process is definitely doable, but you'll need to make sure you've got the right mounts and wiring for the new engine. Has anyone here had any experience with a swap?"

 

[nemoss]

Discussion: opportunities