head to the lower sealing seat of the adapter neck. You should feel the valve snap into place.
8. Operate the pump until the valve opens and read the gauge. The gauge hand must be within the proper
color band for the pressure rating of the cap being tested for half a minute. If the pressure falls rapidly
(indicating leakage), reject the pressure cap.
Note: A cap that has been used for some time will probably have a slight seat impression in the gasket;
therefore, if the required pressure is not reached make sure this isn't caused by a leakage from the gasket. If
this is the case, you should try to apply it several times, until you are sure that the leakage is not caused be-
cause of the impression in the gasket. When the cap is reinstalled in the car, the continuous pressure will reseat
the gasket properly.
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