how do i change the thermostats on 1989 BMW 750iL E32

What is your question?

MY BMW 750 iL 1989 v12 e32 seems to be running hot. I just replaced the radiator 6 months ago , seemed fine , is there only one thermostat > is it in the middle of the engine center front. or how can i tell if the thermostat is going bad. should of changed it when i replaced the radiator What seems to make the problem better or worse? longer running or at stop lights How long have you had this problem? a couple weeks