Installing Camshafts

Information 

The tightening specifications for the basic engine are stored centrally.

> Refer to 1X001N Technical values in the appropriate service information. 

> Refer to 2X001N Technical values in the appropriate service information. 

or

> 1001IN TIGHTENING TORQUES, TIGHTENING SEQUENCES AND ASSEMBLY OVERVIEWS

Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.

Information 

• A data matrix code is shown on the staking dihedron of the camshafts. 
• This is a square black/white dotted marking used for identification purposes during the production process. 
• This marking can be used as an aid when inserting the camshafts into the cylinder head. All four camshafts exert the least amount of pressure on the valves when the data matrix code is facing upwards during installation. 

1. Insert camshafts so that the minimum amount of pressure is exerted on the valve springs and lubricate bearing locations with normal multipurpose grease or engine oil.

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   Camshaft position for cylinder bank 1 (similar illustration)

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   Camshaft position for cylinder bank 2 (similar illustration)

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   Camshaft identification on V8 turbo engine

   A	Cylinders 1 to 4
   B	Cylinders 5 to 8
   1	Outlet camshaft identification (green)
   2	Intake camshaft identification (blue)
   3	Intake camshaft identification (blue)
   4	Outlet camshaft identification (green)

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   Camshaft identification on V8 naturally aspirated engine

   A	Cylinders 1 to 4
   B	Cylinders 5 to 8
   1	Outlet camshaft identification (green)
   2	Intake camshaft identification (white)
   3	Intake camshaft identification (white)
   4	Outlet camshaft identification (green)

2. Position housings correctly and screw down. The housings are numbered and marked with E (intake) or A (outlet). Fit camshaft housings evenly and gradually, and slowly approach the tightening torque. The camshafts must not be preloaded or tilted. Outlet camshafts and intake camshafts (also bank-specific) cannot be confused because of the bearing locations and length.

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   Camshaft housing identification

   All markings can be read from the exhaust side/main diagram applies symmetrically for both cylinder heads 

   1	Matching number for cylinder head/intake camshaft housing, cylinder 1 (E1)
   2	Matching number for cylinder head/intake camshaft housing, cylinder 2 (E2)
   3	Matching number for cylinder head/intake camshaft housing, cylinder 3 (E3)
   4	Matching number for cylinder head/intake camshaft housing, cylinder 4 (E4)
   5	Matching number for cylinder head/outlet camshaft housing, cylinder 1 (A1)
   6	Matching number for cylinder head/outlet camshaft housing, cylinder 2 (A2)
   7	Matching number for cylinder head/outlet camshaft housing, cylinder 3 (A3)
   8	Matching number for cylinder head/outlet camshaft housing, cylinder 4 (A4)

   arrow  Direction of travel

   Fig 1: Camshaft Mount, Cylinder Bank 1 To 4 Components Location

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   Camshaft mount, cylinder bank 1 to 4

   1	Screw, Mo x 35
   2	Housing
   3	Dowel sleeve
   4	Housing (intake)
   5	Housing (outlet)
   6	Screw, Mo x 70
   7	Bearing surfaces (oil with engine oil)
   A	Direction of travel

   Fig 2: Camshaft Mount, Cylinder Bank 5 To 8 Components Location

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Camshaft mount, cylinder bank 5 to 8

   1	Dowel sleeves
   2	Housing (intake)
   3	Screw, Mo x 70
   4	Housing
   5	Screw, Mo x 35
   6	Housing (outlet)
   7	Bearing surfaces (oil with engine oil)
   A	Direction of travel