Gen 4 Engine into Gen 3 Prius Partial Guide

Is the 19AWD a 2Z 1.8 ? Then probably so as I would imagine anything dealing with the four-wheel drive will be past the torque plate

 

Still investigating my options... Can the heads be swapped between 3g and 4gs?
I have my old 2012 head and wondering about just putting that on my 2016 block that's still in the 2012 car...

 

Yes, from what I've read only the Corolla, RAV4 & CH-R had the 2.0L that early on in the US from what I understand reading. Priuses had the 1.8L up until 2022. Wondering if the Wiki can use some updating if otherwise? Toyota Dynamic Force engine - Wikipedia

 

What do I do with this hose?

Head gasket blew on the 2012 Prius v and bent rods in #1 and #3. Found a 4th Gen engine to swap in.

What do I do with this hose that isn’t present on the 3rd Gen timing cover? It runs under the exhaust manifold and to the revised coolant port.

I’ve already swapped the exhaust manifold, flywheel, and engine mount, and test fit the 3rd gen EGR (with milling the head to remove the unneeded bracket).

 

If I remember right, easiest thing is to plug the port in the timing cover, do away with the extra pipe and hose, and put a US-market water outlet on the rear of the head.

 

Thanks! It didn't even occur to me that the coolant outlet would be market specific.

 

I believe that is a gen4 coolant bypass direct to the egr cooler as shown below. Gen3 is different on the secondary flow.

With a gen4 engine into a gen3, most eliminate the engine coolant bypass. You also won't have the selector valve.



More detail on gen3 coolant flow
See "Heater Coolant Flow" paragraph
No Heat - Replaced multiple components | PriusChat