man, i just got picked up my car today, and its already freaking out! ive got an 87 TII, if that helps at all, but driving it home today, the stupid 'add coolant' light came on, with that annoying buzzing sound. so i put some coolant in the overflow chamber because it was hot (it was pretty low too). it will stop for a bit but keeps coming back...what is this all about, and how do i fix it?