1949 Chevy Heating And Air Conditioning Heater Hose
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Both the heater hose (shown here) and refrigerant line fittings use rubber O-rings to seal the joint. Applying a little refrigerant oil (supplied) ensures they don't snag, tear, or otherwise get damaged during installation. Add a couple of drops of refrigerant oil to the threads on the fittings as well. View Related Article
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