GM Service Manual Online
For 1990-2009 cars only

The life and efficient operation of the air conditioning system depends upon the chemical stability of the refrigerant system.

The following conditions may result if foreign material contaminates the refrigeration system:

    • A change in the stability of Refrigerant-134a Swash Plate P/N AIPDN 2-90188-300-0 refrigerant oil
    • A change in the pressure-temperature relationship
    • Reduced efficiency of the system
    • Internal corrosion
    • Abnormal wear of moving parts

Use the following general practices in order to ensure chemical stability in the system:

    • Whenever a hose connection is disconnected, wipe away any dirt or oil at or near the connection. This action prevents dirt from entering the system.
    • Cap, plug or tape both sides of the connection as soon as possible in order to prevent the entrance of dirt and moisture. (Remember that air contains moisture. Air that enters any part of the refrigeration system will carry moisture with it. The exposed surface will collect the moisture quickly.)
    • Ensure that the following components remain clean and dry:
       - All of the tools, including the Manifold Gage Set
       - All of the replacement parts
    • When adding Swash Plate P/N AIPDN 2-90188-300-0 refrigerant oil, ensure that the container/transfer tube through which the oil will flow is clean and dry. Refrigerant oil must be as moisture-free as possible.
    • Gather all of the necessary tools and components before opening an air conditioning system. This action will ensure that a minimum amount of time is used to perform the operation. Do not leave the air conditioning system open to the atmosphere any longer than necessary.
    • Whenever the air conditioning system is opened, properly evacuate the air conditioning system before recharging the system.