Replacing gen 3 motor with gen 4

i don't know either, have you asked the seller?

pretty sure any gen 4 will work, but read through the threads here for advice on the difficulties.

 

As soon as I can get my posts up and ad signature, I will try to make a thread on my Gen 4 to Prius V install. I wouldn't go back to Gen 3, unless it was professionally rebuilt with the correct aftermarket head gasket.

 

No offense to the creator of that video but it’s the worst one to follow because he’s using a rebuilt short block with a gen 3 head. They also skip a lot of details. I learned that the hard way while doing the swap in Jan.

Best videos for the swap is @Ragingfit ‘s series. Particularly figuring out the plumbing. I’d also recommend watching gasket masters gen 3 engine swap video just to help with organising removal of the engine.

 

No pipe bending, that's shadetree mechanic stuff. Gen 3 EGR will fit, but needs to have a tiny corner of the head that sticks out too far filed back so you don't have to use a spacer on the back bolt of the cooler and route that one EGR coolant hose straight instead of pinched. All the water pipe mods are using factory OEM parts on mine.

 

What's the miles?

 

Miles on car 110,000 and Gen 4 was a fully rebuilt core (lower and undisclosed mileage unfortunately).

 

Miles on car 110,000 and Gen 4 was a fully rebuilt core (lower and undisclosed mileage unfortunately).

 

That’s a cautionary tale.

 

R&D for the shop and the community since this is barely a thing at this point. But yes, no one is crazy like me. Also swapped a perfectly good HV battery at 85k for the Nexcell pack.

 

Hybrid Pitstop has the connector and it’s clean, nothing wonky.

 

In the video you watched the main coolant hose connects into the same location on the head as the gen 3 motor. That Indicates it’s a modified engine modified to fit the specific swap. I wish that was the case with a gen 4 motor but it’s not. The coolant outlet flange on the gen 3 is “lower” than the gen 4 and it has a stub out that a stubby hose connects to. You’ll have to order the coolant outlet flange and gasket for a gen 4 from the dealer because the connection is flush. Also, the JDM engines have a different plumbing configuration off the outlet flange with additional harness connections that are not in the gen 3 harness.

yes you have to extend the temp sensor connector because the location is higher on the gen 4 engine. Spend the money to get a connector extension unless you’re comfortable soldering wires. I wish I had.

Do not modify the gen 3 exhaust manifold. You don’t need to bend any pipes for this swap. You just have to modify the solid pipe that snakes from the the radiator to the coolant outlet flange. Cut it with a grinder or bandsaw. There’s a thread for precise locations.

You also gotta modify the block like @V Sport Wagon said so you can install the gen 3 egr. Same deal with grinder. You won’t bolt it to the engine it’ll be held in place by intake and exhaust manifold. You’ll see that in the @Ragingfit videos. They are old videos now but that’s because people were still interested in holding on to gen 3s at that time. Most people are avoiding them now.

 

Swap =experimental diy work. Dealer isn’t going to take that. It’s not a Time Machine built out of a Delorean. There maybe a specific resell market for it though. Search for Biff when the time is right.

 

Might come off that way but it was a good learning experience. As soon as I got everything fixed I was involved in an accident which my insurance has yet to cover. All the Mechanical and body repairs are a bit too much for a 13 year old car.

 

if you got a laser level and a ratchet strap you can align the engine within a few seconds. I figured that out when I removed the engine and started over again. The pin marking helps too.

Seems like overheating is a common prob after this swap. Everyone says you gotta bleed properly but I don’t think there’s a video showing the procedure. If I were you I’d be weary of this temp light. You don’t want to blow the head gasket on the new engine. Does your car have a bleeder valve?