Coolant level not moving?

I would check your work. Most likely the coolant is not flowing. Thermostat in wrong, bad connection for the water pump or bad water pump.

Did the radiator fans come on before it overheated?

I find the coolant system is easy to drain and requires no special effort to eliminate air. It does not have the early gen3 vent as it was unnecessary. I fill and leave the cap off for the first warm up. The air bleeds itself. When the thermostat opens around 185f you can see the coolant moving in the reservoir.

 

Any more info on that?

how many miles?

early year 3rd gens had a engine coolant air vent, incorporated into coolant temp sensor just above EGR components. Later years (and I’d assume Prius v too) nixed the vent.

If you opened that vent while filling with coolant air could escape. Maybe try disconnecting a topmost coolant hose there, see if it allows air out, and drops coolant level in reservoir.

 

Just checking....

• You filled to the B line?
• ... installed and tightened the cap?
• ... ran the engine up to operating temp and 7 minutes longer?
• ... shut off and waited until cooled to ambient temp?
• ... level was still at B, had not dropped to F?

 

I have installed 2 water pumps on mine and never had a problem.......

 

Stop leak product?? See if 50/50 water/vinegar will dissolve them, and if so, flush the system with same?

 

Those crystals sound very odd.
Hope it's not stop leak....
I didn't catch if this was a recent purchase.
Might be a headgasket....
Hope not...... I know all about it.

 

What's the miles on it? EGR and intake manifold ever been cleaned?

 

@antny: People are hinting that a previous owner tried to cover up a leaking Head Gasket with Stop Leak. That would be bad news if true. The Stop Leak may have caused the pump failure.

I really hope that is not the case, otherwise a "Death Rattle" may be in your future.

 

Very Possible

 

@antny is a new member. He might not know about the "Death Rattle".

A "Death Rattle" is what happens when a Head Gasket coolant leak fills up the cylinder overnight, and you try to crank the engine. The engine sputters on a cold start.

If you ignore the problem, it gets much worse. Eventually you break the connecting rods, or put a hole in a piston. With a 16:1 Power stroke, the results are impressive. Often the broken parts of the connecting rods break through the side of the engine. A really bad way to start your day.