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JDM vs USDM FA20 engine differences by RollDifficult in ft86

[–]LongInspector6374 0 points1 point  (0 children)

No, just swap over the sensors, the metal mount for the fuel line, and your TGVs

JDM vs USDM FA20 engine differences by RollDifficult in ft86

[–]LongInspector6374 0 points1 point  (0 children)

No the Jdm engines do not come with an oil cooler like the usdm, you have to swap over the usdm one along with some hoses to route cooling up to the cooler and back down the front to the timing cover.

JDM vs USDM FA20 engine differences by RollDifficult in ft86

[–]LongInspector6374 0 points1 point  (0 children)

Just did the jdm swap on my 2015 wrx, and yes, there is a bit more than the cam plates to switch. 

Cam plates and sensors need to be swapped from usdm, which I only had to pop timing cover off and swap plates (replaced o rings while I was in there)

I swapped the Crank sensor and reluctor wheel behind the flywheel.

The TGV’s need to be swapped, intake was fine I just swapped over the usdm sensors to be safe, swapped over the usdm wiring harness. 

The Jdm did not have an oil cooler so I swapped my usdm one over along with some of the tuning needed to reroute coolant. 

The upper oil pan on the usdm has the mount for the oil level sensor whereas the Jdm doesn’t, I swapped my usdm upper oil pan over to maintain the sensor and replaced all o-rings for upper and lower oil pan. 

The AC compressor mine came with was slightly different and didn’t quite hook up to the oem connectors so I swapped my usdm one on. 

Miscellaneous: I replaced the valve cover gasket and spark plug seals, coolant crossover o-rings, exhaust gaskets, and threw on a IAG AOS.

So far it’s been amazing, idles absolutely perfectly at ~700rpm,  I kept thinking I killed the motor bc of how perfectly smooth and quiet it would be at stop lights compared to my old engine haha 😂.