Checking The Timing For Camshafts

→ Never turn the crankshaft against the rolling direction or when the chain tensioner is removed.

→ Proceed carefully with your work.

→ Only turn the engine at the crankshaft.

→ After working on the camshaft, re-set the valve timing.

→ Observe general warning notes and working regulations.

Information 

• The engine does not have to be removed in order to check the timing! 

Information 

• If the camshaft bar cannot be inserted into the grooves of the camshafts, either the crankshaft must be turned by a further full turn in the direction of rotation of the engine, or the tolerance in the timing chain must be taken into account. In the latter case, the crankshaft must be turned to approx. 5 mm above the marking. 

1. Position crankshaft at the TDC for cylinder 1.

   Information 

   Non-observance of the direction of rotation of the engine can damage the engine irreparably.

   1. Turn the crankshaft at the fastening screw for the vibration damper until the crankshaft is positioned at the TDC for cylinder 1 (direction of rotation of engine as viewed from the top/vibration damper is clockwise).
   2. The markings on the vibration damper and joint flange must be aligned -arrow-.
   3. All four cams on cylinder 1 must be facing upwards at the same time (compression TDC).
      Fig 1: Identifying Marking On Vibration Damper/Joint Flange For TDC For Cylinder 1

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Insert camshaft bar.
   1. The camshaft bar - A -  must fit into the groove on the intake and outlet camshafts at the same time.
      Fig 2: Positioning Of Camshaft Bar In Intake And Outlet Camshaft

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Check the timing.
   1. There are two markings on the timing chain housing - MPI and FSI.

      The FSI  marking must be used for this engine.

      Fig 3: Locating Marking On Oil Control Housing (View From Behind)

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.

      Pfeil  - Notch for the FSI markings on the oil control housing

      Fig 4: Locating Marking On Oil Control Housing (View From Front)

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   2. The arrow -1-  , which is stamped on the intake camshaft controller, must be aligned with the FSI marking -2-  on the cover of the timing chain housing.
      Fig 5: Locating Marking On Intake Camshaft Controller

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
      1. Marking on camshaft controller
      2. FSI marking on the oil control housing
   3. The notch -1-  on the outlet camshaft controller must be aligned with the FSI marking -2-  on the timing chain housing.
      Fig 6: Locating Marking On Outlet Camshaft Controller

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
      1. Notch on outlet camshaft controller
      2. FSI marking on the oil control housing
   4. If the FSI markings  on the camshaft controllers match the markings on the timing chain housing, the timing is set correctly.
   5. If the markings do not match, the timing must be reset → 150516 SETTING THE TIMING ON V6 DFI ENGINES .