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So does that mean that it could be the head gasket? If I take the cap off from being cold and start the engine the coolant will start to overflow out of where the cap was.

The head gasket was replace in feb 2007 and the sending unit was replace last month.

I have installed a new thermostat and I still have the heat gauge almost in the red. It is starting to get warmer out and I am afraid to drive my car in fear of it overheating. The radiator was new in 2006 and seems to be fine. Could it be the water pump? I also dont get very much heat from the ...

Which is the proper way to install the thermstat? Does the spring end go into the block or into the hose?

I am trying to figure out why my car's temp gauge is also 3/4 if not closer to overheating all the time. I have the rad fan on all time as well.

I tried taking the rad cap off and watch it for bubbles. Here is my question: with the cap off should the coolant instantly start rising to the point ...

I believe so, after I run the car for a while idling the fan kicks on for a few seconds and then kicks off. When we rebuilt the head I am not sure if the cooling passages where cleaned because my grandfather did that part.

Is there anyway I can check to make sure that coolant is actually flowing ...

I recently rebuilt my head because of a blown valve and burning oil (probably because I overheated it). Since the rebuild it still burns oil but doesn't seem to be as much. Also the temp gauge is always at around 3/4 which I thought was pretty high. I replace the thermostat, gaskets, and radiator ...