Preliminary Work: Notes
WARNING: This page is about a different car, the 2014 Porsche Cayenne, 2013 Porsche Cayenne, 2012 Porsche Cayenne, and 2011 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
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 =>
- Remove vacuum pump.
> 477619 REMOVING AND INSTALLING VACUUM PUMP
Cylinder bank 5 to 8 =>
- Remove high-pressure pump.