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Upper Radiator Hose

The upper radiator hose carries hot coolant from the engine into the radiator for cooling.

Symptoms of Wear or Failure

  • Coolant leak
  • Temperature gauge may run high
  • Engine overheating

Related Repair Advice

  • As hot engine coolant leaves the thermostat housing, it first contacts the upper radiator hose. This added stress makes the upper radiator hose the most common coolant hose to fail.
  • Radiator hoses, like all hoses, should be checked periodically for cracks and swelling. Being constructed of rubber, they are susceptible to dry rot and cracking as they age. They also deteriorate when they come into contact with oil.
  • The entire cooling system should be inspected when replacing coolant hoses. If any other hoses or cooling system parts show signs of wear, they should be replaced at this time.
  • We recommend replacing the hose clamps when the hoses are replaced, as the clamps will weaken over time and new clamps will help prevent coolant leaks
  • To help prevent future issues, we recommend replacing the thermostat when the cooling system has been opened for repairs (e.g. water pump or radiator replacement) or during a system flush

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