So Nick, the answer to my question is that the coolant temperature sensor is accessed from underneath the car vs. from the top of the engine compartment?
If I remove the sensor, how much coolant will I loose since it appears to be at a low point on the engine?

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Accessing from below may be easier on your vehicle.

I would suggest draining the cooling system to prevent spilling.

- Nick

Once you refill it you would need to ensure all the air is out of it. My 06 Boxster was drained due to a Runaway dear hitting my front end and cracking the lines. Once replaced Per the Mechanic knowing all the bleed spots is tricky and prevents Engine overheat warnings that are false. Good guy and admitted the reason for the extra 2 days was he forget this step and the overheat warning popped up on him. The dealership 3 years prior flushed it and mentioned the same thing that without properly bleeding the system of air bubbles this could happen.

Nick not sure if they told me wrong but dealership then my Porsche certified Mech said the same thing. If it is Joey could use any information on the bleed spots to prevent this.

Isn't the classic way to bleed a Boxster coolant system just to release the valve near the overflow tank and run for a bit? Several cycles of warm and cool? I keep hearing this as called burping the coolant system.