2000 mercury grand marquis leaking underneath the hood on the passenger side
Investigate this farther, if it is from the thermostat housing then you need a new gasket installed, If it is not the thermostat housing it could be a hose.
Looking for a Used Grand Marquis in your area?
CarGurus has 1,792 nationwide Grand Marquis listings starting at $2,250.
Search Mercury Grand Marquis Questions
Mercury Grand Marquis Experts