Gen 4 into Gen 3 swap fail

I had the 611 in the Gen 3

 

unfortunately you will need local administrative rights over the windows system you intend to use to talk to the car. I don't have a way around that.

Sounds like it's hung up until somebody has a successful techstream chat with it.

 

Given that there's often a bootleg aspect to Mini VCI drivers, installing on the company laptop might be frowned on by the CISO, if there is one. Maybe it's just as well the installation didn't go.

 

US market hasn't been getting that arrangement, but Euro and Japanese markets do. The gray thing is an electrically-operated "flow shutting valve" that the ECM can use to influence the temperature of the water going to the EGR, cabin heater, and EHRS. There is more info in this thread.

This drawing's not from Toyota, but from an auto-research firm. Funny that they've labeled the same valve "flow shutting valve" in the physical layout, but "selector valve" in the schematic.

When the valve is closed, those paths only get cool water straight from the water pump. That cools the EGR better, and picks up more heat from the EHRS, but doesn't offer much heat to the cabin.

When the valve is open, hot coolant exiting the cylinder head is supplied, so you get better cabin heat, but less heat picked up from EHRS, and less cooling of the EGR.



One approach you can take in an engine swap is to buy the US version of the water-outlet fitting (which doesn't have the flow shutting valve), and cap off the extra coolant line coming around from the water pump.

 

[QUOTE="C-in-DC, post: 3319849, member: 204422"]I could just butcher the mounting bracket off the bottom of the egr but then i'd be relying on the manifold and egr -to-intake pipe sub assembly to hold the egr in place.[/QUOTE]

That's the highlighted portion here?



If so, I would butcher away. Close to two years back I removed the nut and stud at that location, no problems. FWIW @Ragingfit's 4th gen engine transplant into 3rd gen has the EGR system free-spanning, from the exhaust manifold to the the intake manifold. He needed to grind off a lobe on the corner of the head, to avoid interference.

Have you watched his series (it's in a somewhat unexpected location, technically sensible, but...), it goes into detail regarding replumb of the coolant system. He introduces a short section of steel pipe for some reason, just below the EGR system. I'm not clear on the details, but for you, having the 4th gen engine, it'll maybe help.

 

So to be clear with the Gen 4 engine you just can't put the Gen 3 intake the Gen 3 exhaust and pretty much have everything plug up and go where it's supposed to without a whole lot of hoo ha?. Generally Toyota is pretty good about this stuff I don't have a Gen 4 locally to look at but it would seem to me that the center section and the bottom section in the head pretty much dimensionally should be the same and then if you were to pile on the Gen 3 ancillaries. And go . But I imagine there's some problems somewhere.

 

When I was doing swaps I always like to have both engines hanging from a chain where I can rotate them around at almost eye level so I can kind of get a feel for bracketry components hanging strangely differently and all that and I would just try to duplicate that on what I'm putting back into the vehicle so that when I got it in the vehicle everything pretty much lines up and does what it's supposed to I mean I have it all out of the vehicle at the time so taking the extra time to hang them be able to rotate them swap out parts makes it a lot easier.

 

As suggested in #27, you can just cap it off.

 

I haven't done this swap yet contemplating it for other vehicle but maybe never get there Not sure yet. But it seems to me if you have them hanging both there you should be able to make the gen4 engine look like the Gen 3 bracketry and all of it and still get the benefits of the Gen 4 internals rings whatever they've done but apparently this is some sort of a challenge I haven't put this challenge in front of me yet so I don't really know what it is and I haven't watched the other guys six videos back here five or whatever it is I might do that tonight.

 

The head's a bit different. The Gen 3 water outlet connections won't just go on it, so you have to kind of improvise something. And the Gen 4 timing cover has a new water outlet for that pipe that runs around the back, so if you're not using that you'll at least need to plug or cap it.

 

Or look at a different solution.
Here's an app and device review for Gen2. See post 37.
I did try a couple (from #7-10) on a Gen3 when one was in the shop and it seemed to work. I would EXPECT similar functionality from all four on a Gen3 vs Gen2.
https://priuschat.com/index.php?posts/3290690

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