RS 6 V8-4.2L Turbo (BCY) (2003)
Expansion Block/Orifice Tube: Service and Repair
Restrictor, Removing And Installing
Removing
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Discharge A/C refrigerant system.
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Remove plenum cover.
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Unscrew connection -A- (tightening torque: 15 Nm).
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Pull restrictor -B- out of refrigerant line (e.g. using long nose pliers)
Installing
Installation is the reverse order of removal, observe notes and tightening torque (see removing notes)
NOTE:
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When replacing restrictor, observe color of restrictor and only install restrictor with same color (e.g. white or yellow), restrictors with different
colors have different diameters in restrictor hole.
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Install restrictor -B- correctly (arrow on restrictor must face evaporator).
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Make sure that O-ring -C- (7.5 mm x 1.5 mm) is properly seated in the groove.
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Replace O-Ring-seal -D- (10.8 mm x 1.8 mm).
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Seal all open connections.
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The restrictor must fit in refrigerant line without play.
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Before installing O-ring for restrictor, lubricate lightly with refrigerant oil.
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Install refrigerant lines free of stress.
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Check position of refrigerant lines to evaporator, they should not come in contact with other components.
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Install all removed components again.
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Evacuate and recharge refrigerant circuit.