After four years of service the incidence of failure goes up dramatically. If these parts have not been replaced, new ones should be considered for preventative maintenance. New clamps should also be installed. The operation of the cooling fan is another item that needs to be checked to make sure it is working properly. On older rear-wheel drive vehicles with a fan clutch, the clutch should also be checked for proper operation and no loss of fluid.
Fan clutches lose their grip as they age, and can be a common cause of overheating.
It's important to make sure there's no air trapped in the system, so any air bleeds on the system should be opened while filling to vent air. Read more Car Smarts. Return to top of this page. Return to previous page. The information above is intended for general educational purposes only.