I noticed that you mentioned all parts normally installed with a overheating problem except for the water pump. A blown headgasket, cracked head or block will cause overheating. There a several types of test leaks you have done by mechanic or purchase at your local auto parts store.
Written on the top or undeside of the OEM radiator cap.
You can find the 1997 Nissan Maxima thermostat on the front of the engine. You can follow the top radiator hose directly to the thermostat housing.
go to boremnder on you tube 4t gen Maxima
Drivers side in front of the battery.
yes
The 2002 Nissan Maxima water pump is located on the front of the engine. You can follow the top radiator hose directly to the water pump.
I think you have to follow the lower radiator hose to the engine block.
its under the engine aginst the firewall not the by the radiator....
look for antifreeze coming out of the radiator as the engine warms up after a cold start.
Engine overheat. Check coolant level along with radiator cap for proper pressure and radiator for any leaks.
Stand in the front of the car and follow the upper radiator hose on the left. The thermostat should be in the housing where the radiator hose ends.
Usually in a removable housing at the engine end of the upper radiator hose