How to Pressure Test a Radiator

Below guide will teach you How to Pressure Test a Radiator . Please follow the instructions carefully.

Things You’ll Need:

  • Cooling System Pressure Tester

Estimated Costs:

  • DIY Costs: Est. $0.00 parts only
  • Shop Costs: Est. $63.24 parts and labor


  • Make sure that the engine is cold. Prop the engine hood up and look for the radiator.
  • Carefully examine the radiator for any signs of leak, damage or corrosion.
  • Following the instruction, position the cooling system pressure tester.
  • Using cooling system pressure tester, apply pressure and look for any leakage.
  • Don’t forget to test the radiator cap as well.

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