Overheating Options

[Moobit]

Not really sure what this can be. No signs of a leak.

I have 2 videos. Quality is just plain bad but it shows what i need to show.

One shows when it warms up. It is under C and then in a couple of seconds it goes up to norm operating temp.

http://www.youtube.com/watch?v=nq9B5FR-VGg

Second one shows when its at norm operating temp and then goes up slowly. Only seems to heat up at idle. As soon as the temperature goes up i accelerate and then the temperature suddenly goes back to normal.

http://www.youtube.com/watch?v=paE0S3BwTlg

Not sure if this might be a sensor problem. I have never really encountered this kind of problem where the temperature would change so fast.

Any ideas what it can be?

[Moobit]

Thanks guys. I guess i will check everything step by step.

First i will check if the coolant level is where it should be then i will most likely try to burp all the air out. I read somewhere this is done by warming up the car with the cap off and then turning the heater on?

If not, then good thing the thermostat, sensors, and radiator cap are fairly cheap. Where is the thermostat located in our cars anyway? I have the 2.2 5sfe by the way.

Yes this was done while i was parked and revving the engine. Yes it stays at normal operating temp while cruising. Have not really paid attention to the fans. When are they suppose to turn on?

I just hope its not the water pump.