There are several components that will cause overheating;
Leaks in Radiator hoses, coolant, heater and by-pass hoses.
Leaks in radiator or corrosion
Cooling fan(s) not working
Also, the catalityc converter can clog and cause overheating
Below is a URL for a walk through to insoect, test and determine the source of over-heating issues;
Tuesday, August 30th, 2011 AT 11:30 AM