Swapping in a Gen 4 Prius' 2ZR Engine into the Prius v

HI Every one HI @Mendel Leisk sound slike your good follower to this subject. whats wrong the with switch to Gen 4 so far. I have 2012 blown HG and the the oil is already Pinkesh on 225 K 2012 Prius V. what is going on with Nagging over heat. I am not sure if i change the headGasket is Enough. there are JDM 3rd Gen as well why not replace 3rd Gen instead fir rebuild. are we ableto figure out thr Over heating causes

 

in Addition to : Leave the fuel rail and fuel injectors on the new engine.
And do not disturb the oil pump if you can help it. If it loses its prime it will not pump oil.
by

 

If you’re considering an engine swap, I’d stick with a Gen 3 donor. 4th Gen engines have resulted in nagging overheat issues, and AFAIK no one’s sure why.

Tx is Texas? Not sure what options are close to you. @rjparker may have some leads.

Hybrid Pit Stop in LA is selling 3rd Gen rebuilds.

 

Thank you for the reply. The JDM 3rd Gen replacement with 65k miles costs around $1000-$1400 in Dallas, Texas. I would definitely go with a replacement.

Just today, I discovered that my EGR was the issue. My 2012 Prius V had a misfire only on startup, but it wasn’t losing any coolant at that point. Up until last week, after 5 months of driving with only miss firing on the Engine start , the car started misfiring when I pushed the gas from a stop, like at a traffic light. There was also a lot of rattling, and I began losing significant coolant over the past couple of weeks.

Today, I unplugged the EGR ( Delete EGR) , essentially deleting it, and to my surprise, the car started up perfectly fine. It was very strange, but unfortunately, it’s too late. The coolant has already started mixing with the oil, which has blown the head gasket.


But is'nt Gen 3 will have the same issue, how about @Ragingfit I wonder if he he still has any issue with heating issues.
burping the Prius is major issue.

Thank you for the advice

 

You are not making much sense. What does the oil pump have to do with anything?

In general you want a rebuilt engine ideally to get 150,000 or more additional miles. If you are lucky, a JDM used engine may be good for 100k or better. A head gasket job or even a rebuild on your engine with coolant in the oil is too much to ask.

Share your location and we might have some resources for you.

 

I am Texas Austin, My 2012 Prius is 225k that why I dont think the rebuild is good for me. so I want to go with the replacement 3rd Gen or the 4th Gen. I am going to follow @Ragingfit Videos. but some reported heating issue with Gen 4.

In Texas the deliver to home
not able to past link over here
1- JDM motor in San Antonio
2-JDM Motor in Dallas

there are many vendors who claim's to be bout 65K miles on them

This will be my first time and advice is appreciated

 

Hi @cnc97 would you mind expand and explain more about your way of the swap Gen 4.

 

IIRC he retained his third Gen head.

 

do you mean only the Top of the 3RD Gen ?
or
from the top to the 3 Gen to Head Gasket ?
How about The EGR ? 3rd Gen ?

if that a solution which sounds like one so far, more details is appreciated

 

You have various parts reused from the gen3 when you do a gen4 conversion. The secondary coolant hoses are way different and people make their own routing. The diagram in the pdf is not close to a gen3 or a gen4. Wiring changes as well. As a first time diy'er it is not recommended. There was a guy out of OKC that was doing them for $2k labor but he largely quit due to call backs - probably most not his fault as the customer had to buy their own gen4 engine separately.

When we say rebuilt we don't mean your wasted engine. A pro shop rebuilds clean engines after tearing them completely down. Hybridpit is one of those shops and they ship to you or your mechanic. They would sell you a better than new gen3 with better rings, pistons and gaskets.

If you want the lowest cost and lowest customization you will need to try a JDM out of San Antonio. Probably $1500 you or your guy install. Some shops install them in a long day.

There is a guy in Taylor that does some Prius jobs if you want to stay close to Austin.

 

[QUOTE="rjparker, post: 3501053, member: 41651

If you want the lowest cost and lowest customization you will need to try a JDM out of San Antonio. Probably $1500 you or your guy install. Some shops install them in a long day.

There is a guy in Taylor that does some Prius jobs if you want to stay close to Austin.[/QUOTE]

Please send me his information. Yes, of course.
My initial thought is to consider a 4th Gen Primarily or 3rd Gen secondary like a JDM engine from San Antonio or Dallas.
If it’s a 3rd Gen, I am concern that it will likely end up with the same old issues, than I was considering ordering a 4th Gen instead.
but The reported Heating issue with everyone here si also concerning.

The main reported issue with the 4th Gen engine in this thread is overheating. After extensive research, the overheating seems to be caused by the following factors:

1. Air in the system.
2. Adding the 4th Gen EGR system in 3rd Gen car.
3. Faulty water pump (which is very common ).
4. Blocked EGR cooler.
5. Faulty EGR Valve ( like mine)

This assumes that all the pips are installed perfectly.

My question is:
Does installing the 4th Gen engine itself lead to overheating and other random issues? I hope to hear from more people after insalling 4th Gen. I read 58th Thread till the end and watched @Ragingfit

Or is it better to just buy a 3rd Gen JDM engine and deal with its high oil consumption over time?

By the way, as of 2024, the 4th Gen engines are starting to appear in shops and dealerships with head gasket (HG) issues as well.

Hoping to hear more from the 4Gen swap owners for an update.

 

2010 Prius headgasket around 166k swapped gen 4 engine kept overheating. Not the engines fault. My heat exchanger clogged and coolant wasn't able to flow fast enough. Burned up a few water pumps. I took heat exchanger out of the coolant loop. Drove 20k miles no issues. Sold the car. I used gen 3 intake EGR + plumbing.

Uncles 2010 Prius motor went out around 210k .. Was looking at gen 4 engine, prices went up since last time I did mine. Also seen the head gasket problem pop on gen 4. 1400 or 2100 for Hybrid Pit rebuilt. Uncle decided on rebuilt. Hes put around 60k miles still going strong. No oil consumption even though hes lazy with oil changes.

2014 Prius V 188k head gasket went. Never overheated just pulled out of a driveway one day turning right. Did the shakes... I already knew what that meant. This time I just did a head gasket job. It's at 205k now leaking tons of trans fluid tried replacing axle seal still leaks. I will replace transmission wearing Santa Hat. PM me with any pointers on transaxle replacement not a lot of info out there.

 

If it was a Hybrid Pit Stop rebuild, probably has the revised piston rings. The original spec piston rings were the likely suspect for gross oil consumption.

 

Hybridpit now offers the ‘JDM refresh build’

Package includes:

B12 Piston soak
New timing chain and components
Felpro Headgasket (built better then OEM)
New Headbolts / Washers
Fuel injector cleaning / balance
New Toyota O rings / hoses
Check tolerance on head / block
Resealed timing chain cover (no leaks)
All parts torn down & cleaned by parts washer

This process will help extend the life of the JDM Engine by using a better Headgasket and with the B12 soak to help with burning oil issues associated to JDM engines.

Just purchase a JDM motor to be shipped or dropped off to Shop. Once done we can ship the package directly to your residence or arrange for pickup up.






Hybridpit
(855) 492-4440

 

I've used kerosene in engines of all kinds to clean both combustion and filthy oil pan / passages issues. Thanks for the pics of Berrymans, I'll be giving that B12 product a try for sure.