Dry run a Radiator Cap
Permit the course to chill and remove the cap. Gaze the seal for damage. Heat cycling of the seal hardens the rubber, and split seals are a everyday source of leaks. Damaged seals depend upon replacement of the radiator cap. Commonplace operating temperatures of 210 to 220 degrees F can basis overheating without the power supplied by the cap.
Instructions
1.One of the most overlooked causes of overheating in a vehicle is the radiator cap. The radiator cap holds energy on the cooling course to uplift the Hot location of the coolant. Every one pound of energy in duration in the manner raises the Hot location of the coolant three degrees. Habitual tardy pattern radiator caps stand the Hot aim of the coolant to sorrounding 260 degrees F. Other damage, such as bowed or broken recovery valves (the recovery valve is a CD shaped plenty in the centre of the cap.) and rusted springs require replacement of the cap.
2. Install the cap onto the radiator cap adapter supplied with the tester set. This adapter looks like a radiator filler neck on both ends. Install the cap on one end, and attach the other end of the adapter to the pressure tester. There are several different sizes and shapes of radiator cap, and several sizes and shapes of adaptors. Select the adapter that is the same shape as the radiator filler neck on your specific vehicle.
3. Pump the pressure tester to the pressure stamped on the radiator cap. If the pressure releases the pressure before reaching the correct pressure, or the cap does not hold pressure, the cap is faulty. Remove the cap from the adapter, and reinstall it on the adapter. Repeat the test to verify that the cap is faulty.
