Q: How to replace the evaporator core on Buick LaCrosse?
A: The service procedure begins with HVAC module assembly removal then continues with recirculation housing screws followed by detaching the housing from the assembly. First unfasten the screws that keep the mode actuator on the HVAC module assembly then disconnect the mode actuator. Start with removing the bolts which secure the TXV to the evaporator core before separating the TXV itself while discarding any old seal rings present in the evaporator core. You must first separate the HVAC module assembly upper case from its lower case position before using a small chisel to eliminate the heat stakes. The HVAC module assembly case must be separated from the rest before removing the evaporator core. Tables with refrigerant oil rates for replacing evaporators can be used to determine appropriate oil addition. The HVAC module assembly lower case should have the new side, upper, and two lower seals installed to the evaporator core before placing it in position. Drill the dimples near the heat stakes from the upper case interior while using a 5.5 mm (7/32 in) drill bit then join together the upper and lower HVAC module assembly case and replace the upper case screws to lower case while tightening to 1.5 N.m (13 lb in). Drive in new screws through holes that are next to the heat stakes following a 1.5 N.m (13 lb in) torque specification. Secure the mode actuator with screws that need to be tightened to 1.5 N.m (13 lb in). Screw and tighten the HVAC recirculation housing to the assembly until it reaches 1.5 N.m (13 lb in). Sealing washers should be replaced on both the evaporator core and the TXV before securing with bolts whose torque must be set to 7 N.m (62 lb in). Complete the installation with reinstallation of the HVAC module assembly.
Q: How to Service an Evaporator Efficiently on Buick Regal?
A: Starting the replacement of the evaporator core requires the HVAC module assembly removal and complete sealing components. The next step requires separating the recirculation housing from the HVAC module assembly after unclipping the defroster actuator retaining clip to remove the actuator. You must unscrew the upper screws of the HVAC module assembly case to separate it. The user should remove both the lower module case seal and the HVAC module assembly seal before extracting the evaporator core with its accompanying water core filter. Install new upper seals together with a new side seal as well as the water core filter onto the evaporator core when replacing it with refrigerant oil. The HVAC module assembly seal needs to be installed onto the lower module case before placing the evaporator core inside the lower case. Foot of the guide touches its position and the upper and lower HVAC module assembly case joins along with proper 1.5 N.m (13 lb in) torque on upper screws. After assembly of the HVAC module, the installer should first secure the defroster actuator then install the recirculation housing by tightening the screws to 1.5 N.m (13 lb in) before completing the installation.
Q: How to replace the evaporator core on Buick LeSabre?
A: The first step to replace the Evaporator core requires disassembly of the hvac module assembly. The first step involves removing the seal surrounding Heater Core and Evaporator tubes followed by unscrewing the upper hvac Evaporator case screws until the hvac Evaporator case separates into two halves for access to the Evaporator core that needs removal. A user should add correct refrigerant oil to the Evaporator before installing the Evaporator core into its housing followed by upper hvac module case installation. The upper hvac module screws need tightening to 1.4 n.m (12 lb in) while following the installation of the seal that covers the Heater Core and Evaporator pipes prior to hvac assembly completion.