Installing Camshaft Housing

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Ingress of dirt

Danger of material damage due to blocked oil bores/oil ducts.

→ Absolute cleanliness is essential when working on the engine.

→ Lay removed engine parts on a clean base and make sure to cover them.

→ Use the cover for dust protection when fitting the engine NR.165 on the engine assembly support.

NOTE: Interchanged or dirty bucket tappets

Scoring on cylinder head

→ Since the bucket tappets have been run in the fitting bores, do not interchange them.

→ Absolute cleanliness is essential.

Fit new seals for camshaft housing. Observe marking.
1. 1.1. Fit new metal seal. Markings must be facing you.
  1. 1.1.1. Side 1-3: TOP 1-3/left .
  2. 1.1.2. Side 4-6: TOP 4-6/right .
2. 1.2. Fit new molded seal for chain housing.
  
  Fig 1: Identifying Chain Housing Molded Seal
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Place camshaft housing in position.
1. 2.1. Be careful with the dowel sleeve -1- on the chain housing.
  
  Fig 2: Identifying Dowel Sleeve
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Screw in 18 Torx screws (M8) evenly and tighten according to the prescribed tightening sequence.
1. 3.1. Pre-tighten screws. → Initial tightening: 23 Nm (17 ft. lb.)
2. 3.2. Tighten screws to final torque. → Final tightening: 28 Nm (21 ft. lb.)
  
  Fig 3: Tightening Sequence For Camshaft Housing
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Coat fitting bores for tappets with new engine oil.
1. 4.1. Fit bucket and switchable tappets at their original position. Be careful with the feather keys on the switchable tappets -arrow- .
  
  Fig 4: Locating Switchable Tappets
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.