Car is running hot I think it's my water pump .

There are a number of scenarios that could cause engine overheating. 1) Low radiator fluid level. 2) Radiator blockage

3) Stuck thermostat 4) Loose fan belt(s) 5) Loose cooling fan clutch or electric coolant fan not working. 6) Failed head gasket

7)Or last but not least an error in the actual cooling system temperature readout ie temperature sensor failure. and finally 8) Coolant leak.

All possible scenarios must be checked out.

The most likely causes of a hot running engine are the following:

1. low antifreeze level in the radiator and cooling system.
2. fan not turning on at operating temperature.
3. restrictions in the cooling system such as sediment build up.

Water pumps usually leak when they are bad, and can cause an overheat because of low coolant level.
Check whether the water pump is leaking after topping off the coolant level and running at operating temperature, and then shutting off the car's engine.