Install new approved service replacement air conditioning O-ring(s) and seal washers whenever a joint or fitting is disassembled.
Some vehicles use flat sealing washers and O-ring(s) to seal the refrigerant system. The seal washers are used on block fittings of refrigerant components. The O-ring(s) is used to seal the refrigerant tubes.
The O-ring fitting consists of:
| • | An aluminum alloy, externally threaded fitting which is welded to an aluminum tube. |
| • | A free-spinning internally threaded nut. |
| • | An aluminum tube end which accommodates the O-ring(s). |
Verify that the seal washers or O-ring(s) have not been damaged prior to installation. Replace damaged parts.
Coat O-ring(s) with the approved refrigerant oil.
Seal washers do not require a coating of oil before installation.
Failure to use the proper service replacement parts and procedures may result in a leak.
Service Caps Seal
The primary seal for the service ports is the sealing cap. The cap contains a specially designed O-ring or gasket which provides a leak free seal. Should the cap be loose, missing, or the wrong usage, a loss of refrigerant could result.
