Are you running the air conditioner? If the drain line is plugged, it will leak water (condensation) onto the passenger side floor.
you do nothing
This year Mazda protege does not have a serpentine belt. It has two belts, one for the alternator/water pump, and the other for the power steering and a/c.
Drain the water from your Mazda Protege radiator. Remove the hoses from your radiator. Remove the radiator stabilizing arm. Remove the radiator retaining bolts. Reverse the process to install the new radiator.
Check radiator hose, leaking water pump, look for hole in radiator, leaking coolant bottle or leaking seals.
You have either a blown head gasket or a cracked head
Check the timing belt Answer - My 99 Protege was leaking out coolant slowly out of the water pump. A seal on it had gone bad and the pump needed to be replaced. Haven't had a leak or an overheat since new pmp was installed.
Passenger's side? Could be a leaking heater core
have your heater core checked its probually leaking
Check the engine thermostat.
Replacing the 1997 Mazda water pump will cost approximately $300. The water pump will cost about $75 and will require four hours of labor.
If it is leaking or noisy then it is bad. You should also be able to see the coolant flow with the engine cool and radiator cap off. Give it time to warm up and you will see the movement of coolant if it is working.
more than likely the heater core is leaking