['Common Symptoms of a Bad or Clogged Radiator. #1 – High Temperature Gauge Readings. #2 – Coolant Leaks. #3 – Fluid Discoloration. #4 – Exterior Radiator Fins Blocked. #5 – Bent or Damaged Fins on the Radiator. #6 – Heater for Passenger Area Not Working.', 'Average Radiator Replacement Cost.']