If the cooling system has ONLY water in it, you need to add coolant in order to maintain a ceertain ratio of coolant content to water content. Water by itself is not sufficient to carry off the engine's heat. If you do have coolant in the system - then you should check the cooling fan for proper operation (i.e.: is it coming on and runnng when the cooling system is hot?) - Also check to determine if the water pump has failed. Because of the age of your vehicle (mine is a 2000) my guess is that it is going to be a failed cooling fan sensor, or a water pump failure.
The best indication of a bad thermostat is when the radiator fluid (Antifreeze) boils over from the reserve tank, not the radiator. This is caused by the thermostat not opening at its preset temperature and all the extra antifreeze is pumped directly to the reserve tank. You will also have loss of power and the vehicle will likely stop running soon after the antifreeze boils over.
water leak or bad thermostat
Pressurised coolant boils at a higher temperature than unpressurised
Check for low coolant level.
Take it to a radiator shop and they will find out what is stopped up and repair it. GoodluckJoe change the radiator cap it work for my 92
You need to check coolant temperature sensor and the water pump.
The radiator may have debris that needs to be flushed out.
You most likely have a blown head gasket.
Your question sounds more like a statement! well so your coolant reservoir plastic tank has overheated and probably has hot steam shooting out of it.. this is probably due to either your thermostat getting stuck shut. but it is most likely your radiator has some sort of hole or leak. When the water in your radiator is sealed the water boils at a very high temperature wich is a good thing. but when the seal is gone the water boils at normal driving temperatures. check your radiator hoses and the radiator itself for any leaks.. good luck
Radiator clogged? Radiator air flow restricted? Bad radiator cap? bad water pump? Cooling fan not working?
chances are that you have a blockage somewhere heater core radiator heater hose try flushing the system first then go from there
boils on a Virginia