Replace thermostat on 1998 pontiac sunfire

Since you have never done any mechanical work before, I suggest you get yourself a haynes or chilton manual (around $20.) and read the instructions for that repair. Thermostats used to be a fairly easy repair but for the past several years, manufacturers have started moving them to all kinds of strange and difficult to reach locations.
Read the manual and look at what the job may entail. If you are comfortable with what you see, then do it, otherwise have a shop do it for you. Buying the manual you can use it to do many other repairs, so it's never a bad thing to have!!! Make sure the engine is cold before doing anything though so you don't get burned!!!
Good Luck!

U **** at commenting on **** so just ****** and dnt type anymore. since u kno so much then u can do it *******

My suggestion on you if you do it by your self you my brake the something or you strip the tread so just let somebody do it for you