GMC 3033879 Orifice,A/C Evaporator Tube

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Properly discharge the air conditioning system into a recovery/recycling machine, raise and support the vehicle, disconnect the fitting, and the liquid line from the condenser outlet, cap the refrigerant lines when opening the system to prevent the entry of dirt and moisture and the loss of refrigerant lubricant, remove the A/C orifice tube using the orifice remover, remove as much of any impacted residue as possible, if the system has a pressure switch near the orifice tube location, it should be removed prior to the next step, carefully apply heat with a heat gun (hair drier) approximately ¼ in. (6mm) from the dimples on the inlet pipe, do not overheat the pipe, while applying heat, use the extractor tool to grip the A/C orifice tube, use a turning motion, along with a push-pull motion, to loosen the impacted A/C orifice tube and remove it, install the A/C orifice tube with the shorter screen end in first, connect the line to the condenser outlet, then tighten, lower the vehicle, evacuate, charge and leak test the system. Metal chips, flakes or silvers found on the A/C orifice tube screen can usually be blown out with shop air once the tube is removed, replace the tube only if one or more of the conditions is noticed such as the plastic frame is broken, the brass A/C orifice tube is damaged or plugged, the screen material is torn, or the screen is plugged with fine or gritty materials. The use of special tools will be needed for this procedure, J-26549-C the orifice tool remover and J-26549-D or equivalent, and an extractor.

To remove the system, start by discharging it and then disconnect the refrigerant line at the evaporator inlet. Remove the orifice tube screen from the inlet tube. For installation, follow the reverse steps of removal, making sure to install the end marked "shorter screen end" first. Finally, have the system evacuated, recharged, and leak tested.

To remove the A/C orifice tube, start by discharging and recovering the refrigerant. Then, open the hood and locate the fitting for the A/C orifice tube. Hold the stationary fitting with one wrench and loosen the other fitting with another wrench. Inside the pipe leading to the evaporator, you will find the orifice tube with a fixed-diameter orifice and mesh filters at each end. Use needle-nose pliers to remove the orifice tube. It is important to check if the screens are not plugged, torn, and if the plastic housing over the screens is intact, as well as ensuring that the brass orifice inside the housing is unrestricted. For installation, insert the A/C orifice tube with the shorter end first towards the evaporator. Reconnect the refrigerant line and tighten the fitting securely. Finally, have the system evacuated, recharged, and leak-tested by a professional shop.

To replace the A/C orifice tube in your vehicle's air conditioning system, it is recommended to have an air conditioning technician discharge and recover the refrigerant. Once the refrigerant has been discharged, open the hood and locate the A/C orifice tube fitting. Using two wrenches, hold the stationary fitting and loosen the other fitting. Inside the pipe leading to the evaporator, you will find the orifice tube with a fixed-diameter orifice and mesh filters at each end. Use needle-nose pliers to carefully remove the A/C orifice tube, applying heat if necessary. Before reinstalling, ensure that the screens are not plugged or damaged, the plastic housing is intact, and the brass orifice is unrestricted. When installing the new A/C orifice tube, insert it with the shorter end first towards the evaporator, and use a new O-ring lubricated with the proper refrigerant oil. Finally, reconnect the refrigerant line securely and have the system evacuated, recharged, and leak-tested by a professional technician.

To replace the A/C Orifice Tube in the AC system, discharge the system and recover the refrigerant. Disconnect the negative battery cable and remove the air cleaner. Disconnect the high-pressure line near the transaxle to access the A/C Orifice Tube inside the evaporator pipe. Use pliers to remove it, checking its condition. When reinstalling, insert the shorter end towards the evaporator with a new O-ring. Reconnect the refrigerant line and have the system professionally evacuated, recharged, and leak-tested.

The orifice tube can be reused if the screens are not plugged with grit or foreign material, neither screen is torn, the plastic housing over the screens is intact, and the brass orifice inside the plastic housing is unrestricted.

Before reinstalling, ensure that the screens are not plugged or damaged, the plastic housing is intact, and the brass orifice is unrestricted.

Start by discharging it and disconnecting the cable from the negative battery terminal.