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Lower Radiator Hose

By David Sturtz, April 15, 2008

After the radiator has cooled the coolant, the lower radiator hose carries it from the radiator back to the engine.

Symptoms of a Bad or Failing Lower Radiator Hose

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

Lower Radiator Hose Related Repair Advice

  • 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, and 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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