Impreza 2.5 RS Coupe AWD F4-2.5L SOHC (2001)
Coupler HVAC: Service and Repair
5. O-RING CONNECTIONS
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Use new O-rings.
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In order to keep the O-rings free of lint which will cause a refrigerant gas leak, perform operations without gloves and shop towels.
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Apply the compressor oil to the O-rings to avoid sticking, then install them.
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Use a torque wrench to tighten the O-ring fittings: Over-tightening will damage the O-ring and tube end distortion.
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If the operation is interrupted before completing a pipe connection, recap the tubes, components, and fittings with a plug or tape to prevent
contamination from entering.
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Visually check the surfaces and mating surfaces of O-rings, threads, and connecting points. If a failure is found, replace the applicable parts.
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Install the O-rings at right angle to the tube beards.
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Use the oil specified in the service manual to lubricate the O-rings.
Apply the oil to the top and sides of the O-rings before installation.
Apply the oil to the area including the O-rings and tube beads.
