Gen 3 overheating at peak performance

Sounds like you have the stuck oil control rings or whatever goes on in these earlier 2Z engines

 

This happened to me. In my case it was the engine water pump.

To clarify, the engine coolant in my reservoir was of normal color. It did not turn brownish when I had the issue of overheating. That’s another issue of it’s own.

 

Thermostats never go bad in this car do they

 

When I replaced the engine water pump, also replaced the thermostat for peace of mind.

 

At what miles did you do the EGR cleaning?

Did you clean the intake manifold?

Did you disassemble the EGR valve, clean/inspect it's interior? There's a plastic "ramp" at the bottom, critical to it's function, prone to distort/fail. Perhaps more so with protracted neglect, due to extra hot exhaust gas coming through, possibly due in turn to EGR cooler so carbon coated it doesn't cool properly.

 

Did you install OEM? Is it in backwards? Is it made in CHINA?

 

all parts and labor were done at the dealership.

 

320k is typo?

 

Ok, and replacement engine 240k miles back. Impressive!

(In a year or two our 2010 may get to 100k, kilometres… )

 

Why are you pretty sure? What diagnostics did you do?

 

I have similar issues with my Prius. I have a 2011. Changed out engine, water pump, sensor and thermostat. I have issue when I drive high speeds 70-80 mph up hill. Reservoir very hot almost to boiling temperature. Temp red light would turn on or flash and then when I slow down it will eventually turn off. My mechanic replaced literally everything minus the radiator and the inverter coolant pump. Can anyone please help????

No codes or no check engine lights just the red light engine temperature turns on when driving high speeds up hill for long periods of time.

Is the issue temp sensor on EGR pipes?

My mechanic has replaced with all OEM parts. Any advice?

Toyota service rep says might be inverter water pump, radiator clogged up, or water pump.
Just had Toyota dealership diagnosed and they check for any leaks so it’s not the engine. They said water pump and thermostat. My mechanic replaced those 2 parts. I thought I was in the clear but I wasn’t. The car still overheats when driving high speeds 75-80 mph for long periods of time and red temperature light turns on again uphill at high speeds. Anyone please help and TIA

 

What engine did you put in?

 

Overheating its pretty much always one of the three things, no coolant, water pump not pumping, or thermastat valve stuck closed. I actually have my thermastat valve stuck open on my other car so i can never get heating, but at least my engine wont overheat.

The brown in your coolant is the same problem im experiencing right now. Also getting mid 30s in gas mileage due to the misfiring from it. Im convinced oil is seeping in at the headgasket to mix with coolant. Have you replaced the headgasket yourself or did a shop do it for you? Im curious if this is something id want to tackle or if it isnt worth it considering my engine blocks could be warped.