sounds like it needs a tune up.
and id take the t stat out, then put the housing back on and fire the car up, see if coolant pumps out the housing. water pump could be rusted out or somethings clogged up.
also the a/c condenser could be super clogged up with crap preventing air flow to the rad.
then you also need to make sure your fans are coming on.
thaks for the honorable mention your first post lol