Expansion Block/Orifice Tube: Service and Repair

Restrictor, Removing And Installing

NOTE: Yellow colored restrictors (diameter of bore/constriction 1.54 mm) were installed up to Model Year 2001. Red colored restrictors (diameter of bore/constriction 1.42 mm) were introduced as of Model Year 2002. With this vehicle, the modification to the restrictor does not alter the refrigerant R134a capacity.

Removing
- Discharge refrigerant circuit.







- Remove refrigerant line at threaded connection - A - (seal open connections).
- Use pointed-nose pliers to pull restrictor - B - out of refrigerant line.

Installing

NOTE: Only install restrictors of the same type. Restrictors of different color have different bore diameters.







- Ensure correct positioning of restrictor - B - on installation (arrow on restrictor pointing towards evaporator).
- Restrictor must be snugly positioned in refrigerant line
- Check correct positioning of O-ring - C - (7.5 mm; 1.5 mm) in groove.
- Replace O-ring - D -.
- Check type of seal at connections and refrigerant lines (must be designed for same type of seal).
- Lubricate restrictor O-ring slightly with refrigerant oil before installing.
- Install refrigerant lines such that they are not strained.
- Tighten threaded connection - A - to 15 Nm.

NOTE: Check position of refrigerant lines after tightening threaded connection (lines must not make contact with other components).

- Evacuate and recharge refrigerant circuit.