1NZ overheating

[dogsridewith]

Originally Posted by ojeysky

Am reading the temp from my scanner (Blue driver), I once flushed the radiator before putting in a new coolant. How do I know if the temp sensor is bad? By temp sensor, do you mean the ambient temp because that one isn't even existing on the car? (May have pulled out without me knowing). Though I don't know where the scanner gets a reading of 81C from since the sensor wasn't existing.

On the gasket, I was driving on the highway and I suddenly saw the overheating light on the dash, thereafter I was told my gasket was bad because coolant gets thrown out if I start the engine with rad cap open.

After changing the gasket, my temp hasn't gotten beyond 110C but I think it's just because I now actively monitor the temperature as I think it may have overheated otherwise.

Thanks for helping out so far.

maybe U the 2nd one this week killing a Yaris engine by driving along w/ over-temp lamp lit and broken serpentine belt? (or something else disabling the cooling system) but maybe not. maybe neither head gasket is bad and you're just seeing boiling coolant.