If a radiator hose is nearing the end of its life, it is better to have it replaced before it fails and risks causing serious engine damage.
As the hoses get older, they can become soft and swollen and are more likely to split. Chemical contaminents can also cause the rubber to deteriorate and therefore become prone to cracks and leaks.
If a hose needs replacing or has recently been replaced, consideration should be given to replace the rest of the hoses as they also are subject to the same wear and tear.
It is generally more economical to change all hoses at the same time, rather than one by one, as this has the added advantage of allowing a thorough flush of the cooling system and provides the economic advantage of needing only one dose of new coolant.
It also saves the further inconvenience of another hose failing soon after one has been replaced.
The radiator cap and thermostat are also vital components in a car’s cooling system and should be tested for correct operation.
A proper cooling system service should include a pressure test of the system to check for leaks and suspect components.
The cost of this type of preventative maintenance is far less than repairing the consequences of a badly overheated engine.
This information is provided by Gates Australia - Manufacturers of OEM Quality Radiator Hoses.