Engine overheating in the Chevrolet Camaro can indicate a variety of problems, from something as simple as a faulty thermostat to the more complicated and expensive problem of a bad water pump. Properly diagnosing an overheating problem will be a process of elimination, starting with the least expensive possibility and working up from there.
Check the radiator cap seal and spring. A faulty radiator cap can cause a loss of pressure in the cooling system, resulting in overheating. If the cap is damaged, replace it.
Test the thermostat to make sure it's working properly. When the engine has warmed up, feel the upper radiator hose. If the upper hose is cool, the thermostat isn't opening at the proper temperature. Replace the thermostat and see if that corrects the problem.
Inspect the entire coolant system and check for leaks. Even a very small leak could cause a loss of pressure and lead to overheating. Replace any broken seals or hoses.
Make sure the fan is operating properly. Check the fan clutch to verify that it is working. A faulty fan clutch is usually the cause of fan problems.
Check the water pump. A defective water pump will usually produce abnormal rattling or grinding noises. Replace the pump or have it rebuilt.
