Is a water pump any harder to change than a thermostat?

yes on most vehicles and easier to diagnos also. once you have the old thermostat out put it in a cup of water that is about 220 degrees Ferenheit give it a little bit and watch the plug of the thermostat which will be a tiny little disc with wax around it. if it opens you should see it if not replace itIs a water pump any harder to change than a thermostat?Depends on the vehicle, but yes 99% of the time the thermostat is much easier to get to. And much less expensive