Hey guys, I have a Gen 3 2011 Prius. I was losing coolant and couldn't find any leak. MPG loss so I changed the head gasket. I ran it about 1 mile and died, when it does start again it's blowing a crazy amount of sweet-smelling vapor out the exhaust. So I either screwed up the gasket (I would like to think this is not the case) or the block has a crack I couldn't see. I want to swap out the engine. Obviously, I have been looking at the cheaper gen 4. I also like the potential for fewer engine issues in the future. So its either JDM gen 3 for $1200 ~65K miles Local USA gen 4 for $600 ~50k miles Assuming I swap to gen 4 2ZRFXE Is there any difference between gasoline, 1.8L (2ZRFXE engine), Prius (VIN FU, 7th and 8th digit), VIN A (5th digit) gasoline, 1.8L (2ZRFXE engine), Prius (VIN FU, 7th and 8th digit), VIN B (5th digit) gasoline, 1.8L (2ZRFXE engine), Prius V (VIN EU, 7th and 8th digit), (VIN N, 5th digit) These are options when I go to buy on car-part. as long as I have a 2ZRFXE I'm ok? A lot of people here have been talking about using the Gen 4 intake manifold on the swap and having to modify it. This guy here says he used the gen 3 intake manifold and didn't modify anything. Combinations they used. Gen4 Engine EGR Water pump Gen3 exhaust manifold Flywheel assembly intake manifold o2 sensor wiring hardness Fuel rail/injectors They made it seem pretty easy. Thoughts? I want to attempt this coming week edit: and this guy uses the gen3 egr and intake
It would have been nice if they showed HOW they did the modifications. The ground wire to the motor mount does nothing, except ground it to the head. They could have just connected it to the same place on the head. The motor mount does not have a metal to metal contact, it rubber.
Was the coolant loss a lot more than before the head gasket change? If so I’d suspect the HG. 1. What brand HG? 2. Did you follow correct head bolt torque procedure? 3. When placing the head back on, did you drag it laterally? 4. Are you able to read codes, and do you have any, before and/or after HG replacement? 5. Maybe not directly tied in but: did you clean the Exhaust Gas Recirculation and intake manifold?
hhmmmmm I'm wondering if the torque for the head bolts would be different if using a Gen3 head on the Gen4 block??? If the procedure for the Gen4 is the same as the Gen3, and the installation is the same for both, and the torque measurments are the same, I guess they would be the same.
Agree with what you said. I'm not sure what you mean by not having a "metal to metal" contact. I attaches to the block and the chassis via metal to metal.
1. HS26515PT1 (HS26515PT-1) Felpro. 2. yes i did it all correct 3. hmm no. i was very careful 4. yea. not throwing any codes ill try again in a bit here. besides the generic "engine not starting" code.. i thnk its p03xxx 5. yes cleaned it
He put one ground wire on the motor mount, that attaches to the block. It doesn't ground to the chassis because the mount is rubber to absorb the vibration. He should have just attached the wires to the head like the other ground wires. He thinks the is a chassis ground, it is not.
ahh yes. ok i agree with that.. Im thinking of going JDM. it will just be easier for me. if I can save 5 hours of work then its worth a few hundred dlrs.
Is it not possible to swap the entire 4th gen engine/exhaust assembly (engine, intake manifold, exhaust manifold, and entire exhaust all the way back to the end of muffler) into the 3rd gen and only be required to modify the wiring? Yes, the 3rd gen flywheel assembly will be required but this would be a quick swap (no mods required).
Did anyone ever answer Ops original question? "Is there any difference between gasoline, 1.8L (2ZRFXE engine), Prius (VIN FU, 7th and 8th digit), VIN A (5th digit) gasoline, 1.8L (2ZRFXE engine), Prius (VIN FU, 7th and 8th digit), VIN B (5th digit) gasoline, 1.8L (2ZRFXE engine), Prius V (VIN EU, 7th and 8th digit), (VIN N, 5th digit)?"
For those reading this now, if you get a 4th gen JDM engine, make sure you use the 3rd Gen EGR. I had a really annoying misfire problem when I swapped a JDM gen 4 EGR into my 2013 Prius V. It didn't misifre enough to throw a code but you could feel it lurching. I bent the exhaust manifold to accommodate the Gen 4 EGR only to have to bend it back to reaccommodate the Gen 3 EGR. The misfire went away after I installed the cleaned Gen 3 EGR.
