The sensor for the cooling fan is in the water outlet housing. There are 2 sensors. One provides information for the temperature gauge and the other sends information to the computer PCM to control the radiator fan speeds. The CCRM has the relays for the fan high and low speeds.
31 psi
Assuming the car is a V8, 1 8 4 3 6 5 7 2.
The water pump is driven by the cam belt. Replace the water pump at the same time you replace the cam belt, every 90,000 miles. WARNING: This is an interference engine and as such if the cam belt breaks you will have severe engine damage. Do not neglect the belt.