Gen 4 into Gen 3 swap fail

Are people still trying to repin the EGR plug?

Do not do that. It was a mistaken idea from the get-go.

For whatever reason, after somebody may have come up with that wire swap as a covert way of completely scotching EGR to mask an excess-flow problem when using the Gen 4 components, it started getting "explained" on PriusChat as Gen 4 having somehow changed the pinout of the valve, which is baloney.

This has been known now for, like, three years. It needs to stop circulating as a thing people still try to do.

 

same gasket as it will be obvious if it leaks. if it does and you are in a pinch clean it and use the grey gasket seal both sides should work to get you through. anywhoo sounds like your pump issue is related to the water pump impeller. likely melted and warped you hence the horible sound. in my book of shot pumps once you can hear the pump its over. buy an new one. I would never trust a pump the makes sound it will be a short matter of time before it leaves you stranded on the way to the hospital..not where you want to be. I am in the process of testing this brand of impeller its only 40 bucks. will report back soon as short of the logo like asin and toytoa pbap to asin dang near same thinsg. Like i said bleed it bleed it bleed it. never over 203 in maintenance mode you will find you over heat bleed bleed then stress test. if car cant cool itself in maintenance mode it dont stand a chance driving regular. mark my words!
impeller is called pbap on amazon

 

All of these cautionary tales have me thinking, IF it's ever my turn, it'll be a new short block*, reuse the head, and the gasket kit of course. Per @cnc97 .

* According to The Car Care Nut, as soon as Toyota acknowledged the "low tension" piston ring problems, they also stopped sales of short blocks; ensured they all had the revised pistons/rings before resumption of sales.

 

It’s just a “short”? I saw that, a little sceptical; hopefully they’re not doing head gasket when it’s the exhaust heat recovery.

 

If I ever find myself owning another Gen 3, that’s exactly what I will do, use the Gen 3 head on a Gen 4 block. Except I’ll remember to make sure all 16 valves seal before I bolt it down. LoL

 

New block is $1800 USD plus change if I check parts.Toyota site, and then go to the nearest-to-me US dealership (Foothills Toyota, in Washington State, about 50 miles distant). List is $2200 and change.

 

That’s what I was trying to say, maybe awkwardly: list price higher, dealership lower. And yeah, bottom line: $1800 and change USD is what you’ll need to spend. Plus sales tax.

you do need to transfer over what Toyota calls “upper oil pan” or words to that effect.

 

I believe they made changes to the head also, bu tnot sure what it was.

 

What year is it? You could update to the 2015 pistons and rings, and hone out the cylinders.
It would depend on what shape the walls are in. How many miles on it? Was it burning oil?
And if so, how much?
If they are evenly worn, and no flat spots, and still have the cross hatch pattern,
honing would probably work with the new pistons/rings.