I am trying to change the thermostat on a 2002 ford escort zx2 and I have run into a problem. I can't get the thermostat out of the housing. Any advice? I have tried prying it out with a screwdriver. Am I missing something or do I just need to keep on prying. It doesn't seem to budge at all.

Cars & Trucks - Ford - ZX2 - 2002 Ford ZX2