Test and assembly work on power-assisted steering: General
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
Damage to power-assisted steering results from lack of oil in the hydraulic system. Because of the high oil pressure in the hydraulic circuit, even small leaks can cause loss of fluid and damage the servo pump.
Grinding noises when the steering is on lock or the formation of foam in the reservoir indicates lack of oil and/or the sucking in of air. Before filling the reservoir, any existing leaks must be eliminated on the suction side. Alternatively, the defective part on the pressure side should be replaced.
Only Pentosin CHF 11 S may be filled into the reservoir. Pentosin CHF 11 S can be ordered with the following part number:
Quantity supplied 1 litre = 000.043.203.33.