Prius Gen3 engine swap with Gen4 - The installation and result 

Gen 3 design is definitely the peak Prius design

Wondering the same thing... Replacing my head gasket and lapping the valves now and kicking myself.... I probably should have just swapped for a Gen 4 engine after buying all the specialty tools, time expense it is taking to tear apart the engine, and clean it.

Makes sense the 3rd gen prius engine actually had a tiny bit more torque and hp.

No problems so far other than being slower?

I want to know this as well

No the source is with the coolant jacket passages in the block. With the heat up/cool down cycles so high in the Prius, there’s a lot of expansion contraction between head and block. The gen4 block has design changes to the cooling passages to help with less expansion/contraction

@@willyfromthehilliesso a head from the gen 3 with the block from a gen 4 is the ultimate reliable engine?

@@technicalitems731 It's way more reliable that a standard gen3 block with gen3 head. The gen2 engine is the ultimate reliable engine, hands down. The problem there is that the gen2 vehicles look like shit from a design standpoint. Honestly tho the gen3 engine isn't horrible for reliability, just nothing like the gen2. You can expect to get over 200k miles on a gen3 stock setup before the head gasket goes, assuming you keep up on the EGR service and regular maintenance. Still better reliability than most American cars.

I'm wondering about what Toyota did to the Gen 4 to eliminate the problems with the, if it doesn't eliminate the EGR problem what is the sense to do the swap? If you still have to do the EGR cleaning I don't see any reason to swap.

Never mind.. I guess Tony said he sent the head out to be rebuilt then put it in. I was hoping I could see that in the video :)

It doesn't look like they changed the heads over? That's why his old plastic cover couldn't go back on, because it didn't fit the gen4 head ... I'd love it if someone could clarify.

Something about the 5th letter of the vin needs to be A or B

wow how much was that job?

@@imthedrivingcrooner your miles may vary I’ve seen this work in my area go for as low $2500 to as high $4500 you have to shop around and find what fits your budget I found a shop at the lowest end of the spectrum best of luck

Where did you get it done? And how is it running now, no problems?

Where's this workshop located?

I'd say another bad blade cell. Some of these guys are not reconditioning the individual cells properly. And every hybrid cell on ebay have no milliamp rating... voltage of a cell tells me nothing.. (need milliamp ratings)

@@uri78mxI think it’s the one in garden grove California.

He said it took about 4 hours.

@@808zhu I guess it's possible if you have the knowledge and tools you do it everyday, us DIY'ers will probably take a few days

I called them and they said $5k 2 yr warranty for the gen 4 bottom

Good luck finding lithium batteries. You need a good bms for them

@@gloomweed318 you know this guy's has them manufactured specifically for this right?

p0401 is egr flow

Did you fix it? Any updates

245k for mine

Look on Prius chat. There were a few people selling 3d printed brackets for the gen 3

It's a difference in the calculation method, accurately estimating hybrid horsepower is tricky.

How did it go? Any updates on your swap?

@@jbek9779 it went fine, had to custom make a coolant hose for the driver side. Have 2500 miles on the swap now, no issues at all. Getting ready to sell it though, automatic transmissions just bore me too much so I bought another manual.

@@aaronnagy5430 fantastic!! I’ve just bought an engine from 2019 prius.

@@jbek9779we’re you but the engine and how much you pay ??

May be may be not