Join Date: Sep 2008
Location: Fruitland Park,Florida
Had the same thing happen to my 90 camaro dd. Went to the store, pulled out from parking lot, head a loud clunk, then no charge, water temp climbed, etc. Seems the tensioner bearing broke right off. Bought new assembly, no problems since then.
If I were you, I'd take the pulley back and buy the whole assembly. It will cost you more, but you'll have some more peace of mind for the extra $$$.