Removing Hydraulic Valve For Valve Lift Switchover
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.
- Pull off cable plug for hydraulic valve and remove both screws.
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Camshafts, cylinder bank 1 to 4
1 Camshaft (outlet) 2 Camshaft (intake) 3 Hydraulic valve for variable valve lift control 4 Screw, M5 x 12 5 Switching tappet (oil with engine oil) 6 Flat-base tappet (oil with engine oil) 7 Stopper 8 Mounting saddle 1 to 4 9 Stopper 10 Bearing locations (oil with engine oil) A Direction of travel Camshafts, cylinders 5 to 8
1 Switching tappet (oil with engine oil) 2 Flat-base tappet (oil with engine oil) 3 Camshaft (intake) 4 Hydraulic valve for variable valve lift control 5 Screw, M5 x 12 6 Camshaft (outlet) 7 Stopper 8 Mounting saddle, cylinders 5 to 8 9 Stopper 10 Bearing surfaces (oil with engine oil) A Direction of travel - Pull hydraulic valve out of cylinder head. Make sure that the sealing ring is also removed. If it is not, look for the sealing ring using a mirror and a torch.
- Clean front strainer of hydraulic valve with solvent naphtha. Replace the hydraulic valve if damaged or heavily soiled.