Astra G Water pump.

[AndyR]

Hi all, I'm after some advice on how to tell if my water pump is on its way out. 

There is no squeaking from it, but it takes a while to get to running temperature, and the gauge doesn't rise unless i am sitting in traffic. I have fitted a new thermostat, and temp sensor. But its made no difference. 

I was wondering if the water pump maybe wasn't pumping the water around as it should. 

Any help will be greatly received. 

thank you all.

Andy.