A: The receiver-drier should be replaced whenever the compressor is replaced due to an internal failure. Have the air conditioning system discharged by an automotive air conditioning technician. Disconnect the cable from the negative battery terminal. Remove the air filter housing. Remove the drivebelt. Also, removing the power steering pump and positioning it aside will make access to the compressor easier. Disconnect the compressor clutch electrical connector. Disconnect the refrigerant lines from the compressor. Plug the open fittings to prevent entry of dirt and moisture and discard the 0-ring seals. Raise the front of the vehicle and support it securely on jackstands. Remove the front engine splash shield. Unbolt the mounting fasteners and carefully remove the compressor from the vehicle. If a new compressor is being installed, follow the directions with the compressor regarding the draining of excess oil prior to installation. The clutch may have to be transferred from the original to the new compressor. Installation is the reverse of removal. Replace all O-rings with new ones specifically made for air conditioning system use and compatible with R-134a refrigerant. Lubricate them with refrigerant oil. Any refrigerant oil added must also be compatible with R-134a refrigerant. Have the system evacuated, recharged and leak-tested by the shop that discharged it.