coolant and thermostat question, re-updated with a twist Options

[HaysoosKreesto]

Hey everyone, it's been a long time since my last post. Car still runs beautifully but my first ever problem arose that perhaps a friendly user might help me solve, or know of the page that solves it.

So my coolant has been boiling out of the reservoir after driving on the freeway and coming to a stop. I tried changing the thermostat, maybe the thermostat is defective? Well assuming it's not (I do plan on going back to the dealership and asking for a new one in exchange however) perhaps it may be something else. Does anyone know where the sensor to monitor the temperature of the coolant before the radiator fan kicks in is?

I'm having trouble searching for it, but I figured that if I change the sensor and the thermostat (again) then maybe my problems would be solved.

Also if anyone has any idea as to why it continues to do this, with all appreciation I urge you to please respond.

Thank you and much love,
Rafael.

Edit: check last picture to see the new situation

This post has been edited by HaysoosKreesto: Aug 16, 2013 - 10:16 AM

[Box]

It could be a variety of things. First thing I'd do is check compression to make sure it's not the head gasket. Then take it from there by flushing the system. Easiest way to test the relay for the fans is to turn the car on and let it hit operating temperature. Then just wait a few more minutes and they should cut on, provided it's decently warm outside. Being you're in California that shouldn't be a problem at the moment.