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Home >> Porsche >> 2008 >> Cayenne Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 15 - Engine - Cylinder Head, Valve Control >> WM 155519 Removing And Installing Hydraulic Valve For Valve Lift Switchover (Variable Valve Lift Adjustment) (Cayenne S Tip, Cayenne S Man, Cayenne Turbo, Cayenne GTS Tip, Cayenne Man, Cayenne Turbo S) >> Preliminary Work

Preliminary Work

Information 

Guided Fault Finding using the PIWIS Tester as well as the DME short test "Valve lift" must be performed before replacing the hydraulic valve. This is essential in order to avoid replacing the hydraulic valve unnecessarily.

The hydraulic valves lie on the rear side of the cylinder heads facing the plenum panel (under vacuum pump and fuel high-pressure pump).

Cylinder bank 1 to 4

  1. Remove vacuum pump. → Removing vacuum pump

    2. Cylinder bank 5 to 8

  2. Remove high-pressure pump. → Removing high-pressure pump
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