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Tech Tip: Sealing Pipe Connections on Porsche Expansion Valve

Under certain circumstances, refrigerant loss from the area of the expansion valve pipe connections can be misdiagnosed as a defective expansion valve. As of production date October 1993, a longer bolt has been used in the installation of the A/C lines to the expansion valve. The new bolt is installed as a precaution to prevent the expansion valve from distorting, which could cause a leak at the pipe connections on the expansion valve.

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Models Affected:

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1989-later 911 Carrera 2/4, 1991-later 911 Turbo and 1995 911 Carrera

Under certain circumstances, refrigerant loss from the area of the expansion valve pipe connections can be misdiagnosed as a defective expansion valve.

As of production date October 1993, a longer bolt has been used in the installation of the A/C lines to the expansion valve. The new bolt is installed as a precaution to prevent the expansion valve from distorting, which could cause a leak at the pipe connections on the expansion valve.Figure 1

Repair Information:

Use the new bolt, M6 x 30 mm (P/N 900 074 015 02) (see Fig. 1) when repairs to the expansion valve are necessary.

The torque specification for the bolt is 10 Nm. Do not exceed this torque.

Courtesy of Identifix.

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