Q: How to properly install an A/C Expansion Valve on Cadillac CTS?
A: Starting the air conditioning Evaporator thermal expansion valve replacement requires first removing the hvac module. Before disposal the insulation should be taken off from the thermal expansion valve (TXV). The replacement of the air conditioning Evaporator thermal expansion valve begins by unscrewing the hvac line clamp screw and hvac line clamp. The process ends with taking out the bolts that fasten the txv to the Evaporator. Pull the txv straight out from the Evaporator core by detaching the line bracket until it separates from the a/c lines. Apply lubrication on the o-rings before connecting the lines to the txv and gently slide the txv onto the Evaporator core until it reaches full position. Mount the txv line bracket on the Evaporator core while following the specified fastener precautionary steps. Use bolts with torque of 3.5 nm (31 lb in) to secure the txv to the Evaporator. Reattach the hvac line clamp by fastening the clamp screw to 1 nm (8 lb in). To complete the installation you should reinstall the hvac module followed by new insulation applied to the affected lines and txv.
Q: How to replace the A/C Expansion Valve in an A/C system on Cadillac SRX?
A: After obtaining the refrigerant from the a/c system you can begin replacing the A/C Expansion Valve (TXV). The removal process begins with taking away both the i/p retainer and insulation material from the A/C Expansion Valve. Begin the procedure by first removing the hvac line clamp screw before taking away the hvac line clamp. Then unfasten the A/C Expansion Valve to Evaporator bolts followed by the A/C Expansion Valve line bracket. First disconnect and then carefully straighten out the A/C Expansion Valve from the Evaporator core before removing it from the a/c lines while disposing of all the o-rings. Start with o-ring application before attaching the a/c lines to the A/C Expansion Valve unit during installation tasks. Fix the A/C Expansion Valve onto the Evaporator core by using an A/C Expansion Valve line bracket for installation security. Begin by installing the hvac line clamp followed by securing the A/C Expansion Valve to Evaporator bolts at 3.5 n.m (31 lb in) while tightening the screw of the clamp to 1 n.m (9 lb in). The installation process ends with positioning insulation on lines and A/C Expansion Valve followed by the installation of the i/p retainer and evacuation of the system and conclusion of a leak test through the fittings by using the halogen leak detector (J 39400-A).
Q: How to Properly Service and Replace an A/C Expansion Valve on Cadillac XLR?
A: Before installing the thermal expansion valve (TXV) the first step is to recover the refrigerant from the air conditioning system. The second step requires uninstalling the rear Evaporator line assembly. After recovering refrigerant you should remove the txv to Evaporator core mounting bolts then detach the txv from the Evaporator before removing it from the vehicle. The technician needs to eliminate the Evaporator core seal washers and cap installation or protect the core with tape. Begin the installation process by removing cap or tape from the Evaporator core and then add new seal washers. Before installation of the txv to the Evaporator core ensure the mounting bolts achieve a torque setting of 7 n.m (62 lb in). Replace the rear Evaporator line assembly afterward evacuate the a/c system and recharge it. A final leak test on the component fittings must be done with the use of halogen leak detector (J 39400-A).