Overheating

'overheating' doesn't have to mean there's a leak. Writing "the leak" sounds like you do think there is one. Is the level going down?

 

Not if the coolant level's going down sure it's filling up the void I mean how much cool did you put in from your gallon container when you go to fill the system that's your end all be all guide right there pretty much. Usually I sit there and fill the system at a trickle and comes up the neck sits at the little hole that goes to the reservoir tank tube and then all of a sudden you see air bubbles suck it down to where you can't see coolant I feel it back up to the neck again and then see the glub glub and four more in and keep doing that until it no longer drops It's literally stops at the top of the filler neck by stand there for 10 minutes now nothing will happen now I fill up the jug where I supposed to have it and then I put a little more in the radiator neck to make it run into the tube for the jug and then cap it in my '09 and 45 days I'll be able to repeat this process and I can find no coolant anywhere. I thought with the coolant heat storage tank it could be the temp sensor too in that system there's one on the side of the tank I'm sure you can test it. You said you have the pump running by jumping it so it should be working there's also a test where you can come out 4 hours and 45 minutes after the shutdown you initiated that many hours ago wait 15 minutes and at the fifth hour you should hear the pump come on to sample the temperature in the CHS tank and then it turns right off that to me would prove that the pump is working generally like it's supposed to and the call the sample at 5 hours is working I believe this information is in the factory manual.

 

You are definitely in a place where the system is going to be put to the test for sure Conroe Texas is no joke but the Prius should survive down there quite well it does very well in the heat You just need to make sure you're running the air conditioner so that your battery can get the coolest air going to it after you're finished with it cooling you off that is If you don't have air conditioning this could be potentially a big problem in the Big heat of Texas absolutely If you can't get that fixed like it needs the evaporator replaced well you're going to either have to slow down or get another car or shell out the three grand to fix the evaporator those are pretty much your choices Yaris and Corolla have come down since the pandemic I see them all over the place they do quite well in the heat and the Yaris almost gets the gas mileage of the Prius with no batteries no silly business just sensible driving and windows up and air conditioning on.