Component Overview

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Overview Of Cylinder Head

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Intake camshaft
Camshaft bearing cover
Outlet camshaft
Hexagon nut on camshaft bearing cover
Sealing rings (40 x 1.5)
Timing chain housing
Oval-head screw on timing chain housing
Outlet camshaft controller (marking 32 A)
Intake camshaft controller (marking 24 E)
Hexagon-head bolts on camshaft controllers
Cylinder head height (min. height a=139.9 mm)
Drive gear wheel for high-pressure pump
Bearing shaft
Valves
Dowel sleeve
Cylinder head
Pump tappet
Hydraulic tappet
Valve stem seal
Timing chain
Safety clip
Rocker arm
Valve spring
Valve-spring plate
Valve collets

Information

The hydraulic tappets are fitted as bucket tappets on the outlet side and as switching tappets for valve lift switchover on the intake side.
Switching tappets and bucket tappets cannot be interchanged.
The hydraulic tappets have a twist lock for the cylinder head .

Fig 1: Identifying Camshafts (Cylinder Bank 1 To 4)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
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. Bucket tappet (oil with engine oil)
7. Stopper
8. Mounting saddle 1 to 4
9. Stopper
10. Bearing locations (oil with engine oil)
1. Direction of travel
  
  Fig 2: Identifying Camshafts (Cylinders 5 To 8)
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. Switching tappet (oil with engine oil)
2. Bucket 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)
1. Direction of travel