Radiator Cap Tester Adapters

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What is a Radiator Cap Tester Adapter?

A radiator cap tester adapter is a device used for testing the pressure safety valve of a radiator. It allows you to safely examine the performance and integrity of the radiator cap.

How can I determine if mine is faulty?

If the radiator cap tester adapter is leaking, the seal is not working or the pressure valve appears to be damaged or malfunctioning, then the adapter is likely faulty.

Can a faulty radiator cap tester adapter cause damage?

Yes, a faulty adapter can cause a malfunctioning pressure valve, which can damage the cooling system of the vehicle.

How do I replace a radiator cap tester adapter?

  1. Disconnect the negative battery cable.
  2. Remove the radiator cap and the old adapter.
  3. Install the new adapter and replace the radiator cap.
  4. Reconnect the negative battery cable.


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