GM 19418538
Front A/C Line

The first procedure for Evaporator tube replacement in non-hp2 systems includes refrigerant recovery. Start the process by removing the top radiator air baffles together with deflector pieces before taking out the air cleaner unit. Begin by tightening down the surge tank bolt but follow with removing its holding nut before disturbing the cooling system operation. To disconnect the Evaporator tube start by removing the nut from the Evaporator and separate the tube from both the auxiliary a/c tube and the condenser unit when they exist in the system. Discard all used sealing washers before capping each open connection point of the Evaporator tube. To install the new Evaporator tube users must apply new sealing washers before screwing it onto the condenser with 16 nm torque (12 lb ft). The Evaporator tube needs new sealing washers for linking up with the auxiliary a/c tube before you install the nut to a torque value of 16 nm (12 lb ft). Install the Evaporator tube to the Evaporator before tightening its nut to 16 nm (12 lb ft). The installation process should start with replacing the surge tank hold down nut and bolt along with installing the air cleaner assembly before proceeding to reinstall the upper radiator air baffle and deflector. The last procedure involves evacuating and recharging the system followed by a fitting leak test with the j 39400-a halogen leak detector.

The first priority when replacing discharge hoses on vehicles ly2, lmf, l76, and l92 is to recover refrigerant. Take out the discharge hose mounting bolt from the A/C Compressor before separating the discharge hose from its compressor position. First remove the upper radiator baffle before removing both the discharge hose nut from the condenser and the discharge hose at the condenser. The a/c recirculation switch electrical connector should be disconnected while removing the discharge hose from the vehicle along with disposal of the used sealing washers and system opening cap installation. The new discharge hose installation process begins with mounting the hose onto the vehicle before securing it at the condenser through fresh sealing washers. Install the discharge hose nut on the condenser then tighten it to 16 nm (12 lb ft). Insert the upper air baffle in place before reconnecting the electrical connector to the a/c recirculation switch. The repair process requires clamp installation of the discharge hose to the A/C Compressor while using new sealing washers to fasten the hose with its mounting bolt set to 16 nm (12 lb ft). You must evacuate the a/c system while recharging it before conducting a leak test on all fittings using the j 39400-a halogen leak detector.

The first step to replace an evaporator tube demands proper recovery of refrigerant. Start the evaporator tube replacement by removing both the upper radiator air baffle and deflector followed by extraction of the air cleaner assembly. The next step involves removing the surge tank hold down nut while simultaneously detaching the bolt then maintaining the cooling system closed. Remove the evaporator tube nut from the evaporator before disconnection of the tube from its attachment to the evaporator. You should disconnect the auxiliary a/c tube by removing the evaporator tube nut when the system is equipped. You should first remove the evaporator tube nut from the condenser then disconnect the evaporator tube from the condenser before extracting the evaporator tube outside the vehicle. The installation process includes discarding old sealing washers while sealing all opened connections. You should connect the evaporator tube to the condenser by using new sealing washers and then install the evaporator tube nut to the condenser and tighten it to 16 nm (12 lb ft). You must install new sealing washers when connecting the evaporator tube to an auxiliary a/c tube before installing the evaporator tube nut properly and tightening it to 16 nm (12 lb ft). Stabilize the evaporator tube to the evaporator by using the evaporator tube nut which should be tightened to 16 nm (12 lb ft). Install the surge tank hold down nut and bolt before putting back the air cleaner assembly followed by installation of the upper radiator air baffle and deflector. The system evacuation process should be followed by recharging and then the j 39400-a halogen leak detector must perform a leak test on all installed components.

Tighten it to 16 Nm (12 lb ft).

Remove the upper radiator air baffle and deflector, followed by the air cleaner assembly.