Better check the oil for water if you have a 3.1. Also check the oil filler cap for water condinsation. 3.1's are bad about blowing the intake manifold gasket and dumping the enite contents of the radiator into the block. When that happens it is a tow home or to the mechanic. Best to fix it ASAP.
One other tale tale sign is noisy lifters.
I learned the hard way.
Mike