C 1500 Truck 2WD V8-5.3L VIN T (1999)
A/C Coupler O-ring: Description and Operation
General Information
Install new approved service replacement air conditioning O-ring(s) and flat washers whenever a joint or fitting is disassembled.
Some vehicles use flat sealing washers and O-ring(s) to seal the refrigerant system. The flat 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:
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An aluminum alloy, externally threaded fitting which is welded to an aluminum tube.
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A free-spinning internally threaded nut.
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An aluminum tube end which accommodates the O-ring(s).
Verify that the flat washers or O-ring(s) have not been damaged prior to installation. Replace damaged parts.
Coat O-ring(s) and flat washers with the approved refrigerant oil.
Failure to use the proper service replacement parts and procedures may result in a leak.
