How to tell a JDM Engine???

[TurboWeenie]

I recently pulled the engine out of my car and am wondering if its a JDM or not. The metal coolant pipe that runs along the exhaust side of the block that goes to the heater core on the driver's side looks like it has been factory capped off. The previous owner had a hose running over the head to the heater core from the passenger's side outlet of the pipe. Also, the car is a 1990, but the engine has a 6m crank. Is there a sure way to tell if the engine is indeed a JDM replacement?
Thanks
-Ryan

 

[crrider80]

see if there are egr ports.

 

[lagged]

jdm engines have the EGR ports, they are just blocked off with plates.

 

[dbsupra90]

also the throttle body has 1 port on top instead of 2.

 

[TurboWarrior]

When a jdm motors are installed the usdm mani, egr etc is swapped over from your old motor. So thats not a way to tell

 

[WhtMa71]

I just ordered my JDM motor, so i'll compare to my old motor when it gets here. Hopefully this week.

 

[lagged]

When a jdm motors are installed the usdm mani, egr etc is swapped over from your old motor. So thats not a way to tell

you mean, the when the JDM motor is installed its possible the installer swapped over the EGR components in order to pass emissions. right?

 

[TurboWarrior]

right. Ive owned 2 supras. Both with jdm motors installed at one point. Both had the egr system and usdm mani. I suppose lazier mechanics would forego installing the egr. Unless there is no need to keep the car legal. I have the jdm mani in a box the last owner kept from my supra now.

 

[supradan22]

You can check if your Vins match and if it doesn't do a carfax on the vin on your motor's vin if nothing comes up its JDM.

 

[TurboWeenie]

Thanks for the info guys.
-Ryan