Overheating

UNLUCKYDOG

MEMBER
2010 TOYOTA COROLLA
1.8L
4 CYL
2WD
AUTOMATIC
95,218 MILES

My daughters car was overheating. I didn’t see the fan working so I replaced it, the coolant temperature sensor, and the thermostat. I made sure that the thermostat was the same temperature as the previous thermostat. After replacing the parts. I let the car run for around forty five minutes to allow the new coolant to work its way through the car and refilled as needed. It never went over half on the temperature gauge. This morning while she was driving on the freeway it began overheating again. I’m not sure what to check. Any advice will be greatly appreciated.

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

There are two possibilities that can possibly be happening here. The first would be that there is an air pocket in the water jacket somewhere preventing coolant circulation, or two there is gunk in the water jacket that is causing a hindrance to coolant flow. To fix the first you will need to drain the coolant into a container and refill from the highest point in the cooling system. I will usually undo the top radiator hose and fill the cooling system from there until the coolant runs out of where the top radiator hose attached to the engine at, then replace the top radiator hose to the engine/ The second possibility would require a flush and fill. I have included a link below for you to go to:

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

Please go through this guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros