Subaru Impreza 2002 Service Manual page 3175

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
5. O-RING CONNECTIONS
• Use new O-rings.
• In order to keep the O-rings free of lint which will
cause a refrigerant gas leak, perform operations
without gloves and shop towels.
• Apply the compressor oil to the O-rings to avoid
sticking, then install them.
• Use a torque wrench to tighten the O-ring fittings:
Over-tightening will damage the O-ring and tube
end distortion.
• 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.
• Visually check the surfaces and mating surfaces
of O-rings, threads, and connecting points. If a fail-
ure is found, replace the applicable parts.
• Install the O-rings at right angle to the tube
beards.
O-ring
O.K.
Not O.K.
Not O.K.
GENERAL DESCRIPTION
• Use the oil specified in the service manual to lu-
bricate the O-rings.
Apply the oil to the top and sides of the O-rings be-
fore installation.
Apply the oil to the area including the O-rings and
tube beads.
• After tightening, use a clean shop towel to re-
move excess oil from the connections and any oil
which may have run on the vehicle body or other
parts.
• If any leakage is suspected after tightening, do
not retighten the connections, Disconnect the con-
nections, remove the O-rings, and check the O-
rings, threads, and connections.
G4M0581
Bead
S4M0586A
AC-16
HV0062