Mustang GT V8-4.6L SOHC VIN X (1998)
is installed in the fitting opening to prevent refrigerant loss when the A/C cycling switch is removed.
When it is necessary to measure the quantity of refrigerant oil in the suction accumulator/drier, drill two 1/2 inch holes in the suction accumulator/drier
and drain oil through the holes.
In addition to the preceding condition, the suction accumulator/drier should also be replaced if one of the following conditions exists:
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The suction accumulator/drier is perforated.
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The refrigerant system has been opened to the atmosphere for a period of time longer than required to make a minor repair.
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There is evidence of moisture in the system such as internal corrosion of metal refrigerant lines or the refrigerant oil is thick and dark.