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

I ordered some M5 0.8 x 16mm stainless cap screws to replace the Philips screws. Hard to get in at a straight angle on one of the screws, worried that I'll damage it eventually.

Posted via the PriusChat mobile app.

 

Our Shop sourced out a 2017 JDM Prius engine. What type of shenanigans is Toyota doing now?

 

There is a hose that seems to be missing it goes around towards the back to the EGR look at other motors online for that year and you'll see what I'm talking about

 

Ever get this fixed

 

Yes or no, can I put a gen 3 water pump on a gen 4 engine? Dealer only has gen 3 and my gen 4 pump died. They bolt up just fine just want to make sure also what is the difference in pumps for them to change the pump?

 

I've used both. No issues, but someone claims one shaft is slightly longer or bigger. The housing on the 3rd gen is bigger but doesn't matter.

 

DId this hold for you IE long term fix

 

I drive it to work every day.
I cut the jiggle pin on my thermostat.
Who knows why I had to do that but no problems after that.

 

What does the “jiggle pin” do normally, why is it causing problems, what are the benefits of cutting it, and are there downsides?

 

The jiggle pin is a valve in the thermostat that lets air pass through and closes to coolant. Prius' will overheat if air gets trapped behind the thermostat.
I was warned that I must use Toyota coolant but I didn't, so that may be where the problem lies but I have no evidence to prove that.
If you cut the jiggle pin, the valve stays open, and air passes through and so does coolant.
May reduce efficiency. But a car that doesn't run is 100% efficient.

 

Ah ok, so it just maybe runs a slight bit cooler.

 

I cut it and added an extra hole. is that too much perhaps?

 

Whatever it takes !!!

 

Cool thanks. out of curiosity what do you do for a living?

 

On @Ragingfit’s YouTube he’s doing pro plumbing. Very insightful guy too; I really enjoyed the commentary in transplant series.

 

Yes funny entertaining and insightful.

 

IT WAS THE MOTHER LOVING JIGGLE PIN!!!


A big thank you @Ragingfit and ChapmanF


1.car now settles between 180 - 195 F on the freeway
in the city 140 to one 160 F is that too low?


The process. I did


1.flushed system with AIR hose, installed new pump new oem coolant


2.replaced jdm outlet water with us version


3. (KEY FACTOR) cut jiggle pin and added another hole same size opposite side


4.made sure reservoir return hose was on the up angle (I put it above the EGR cooler link to intake.)


5.Opend the purge valve (remove temp sensor above egr cooler if you don’t have this.)

Filled with fresh coolant and squeezed hose next to the thermostat to get extra bubbles out. close purge valve or reinstall temp sensor


6.put car maintenance monde and around 200F open purge valve make sure you have transparent hose so you can see air come out. I you don’t have the purge valve lift the reservoir

tank up high and let it run you should see some air bubbles make their way in to the tank.


7 just monitor temp should be good. GOOD LUCK.

 

Oh this was in the hose that goes to the cat. Some kinda restrictor.

 

oooooooooo