If you look under the car at right side of the engine there is suppose to be
a shield that covers the serpentine belt. If it's broken off and water gets
on the belt it will momentarily cause the belt to slip on the crankshaft
pulley slowing down and or stopping all the other pulleys, alt,p/s,a/c. And
you don't even hear a squeel. But there's was no water you say. Well if the
a/c is on, the suction side of ever metal part sweats and if it's humid, alot
and without that shield it goes right on the belt. This lowered focus came in
with the same concern as your's. His shield was broken off because the car
was lowered. The shield actually hangs a little lower that the pan.