A/C Compressor Relief Valve Replacement

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If the A/C compressor relief valve released refrigerant to the atmosphere, determine and correct the cause of the excessive system pressure, then replace the relief valve

Recover the refrigerant with a recovery/recycling/charging station (see RECEIVER/DRYER DESICCANT REPLACEMENT )
Remove the relief valve (A) and the O-ring (B) Plug the opening to keep foreign matter from entering the system, and the A/C compressor oil from running out

Fig 1: Relief Valve And O-Ring With Torque Specification
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Clean the mating surfaces
Replace the O-ring with a new one, and apply a thin coat of refrigerant oil before installing it
Remove the plug you installed in step 2, then install and tighten the relief valve
Charge the system (see SYSTEM CHARGING )