Expansion Valve, Removing And Installing: Installing

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-- Check the refrigerant pipes leading to the evaporator for contamination and damage.

-- Replace the O-rings -1 and 4- and before installing coat the O-ring lightly with refrigerant oil. Refer to SEALS AND GASKETS .

-- Install the O-rings -1 and 4- onto the connecting pipes -2 and 3- to the evaporator.

-- Make sure the retainer -4- (bracket for securing the expansion valve on the evaporator pipes) is in the proper installation position (must not be pushed too far into the foam piece -5-, otherwise the bolts may not engage).

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-- Attach the expansion valve -4- to the refrigerant lines to the evaporator.

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-- Free up the bolts -1 and 3-.

• If the heat shield insulation -2- is missing or not installed correctly, it can cause reduced output of the A/C system (change of the set control characteristic due to radiant heat).

Install in reverse order of removal. Note the following:

Vehicles with High-Voltage System

-- Install the refrigerant lines to the expansion valve. Refer to REFRIGERANT LINES TO EXPANSION VALVE, REMOVING AND INSTALLING .

Vehicles without High-Voltage System

-- Install the refrigerant lines with inner heat exchanger. Refer to REFRIGERANT LINES WITH INNER HEAT EXCHANGER, REMOVING AND INSTALLING .