Installing Camshafts

Information 

A data matrix coding is shown on the staking dihedron of the camshafts. This is a square black/white dotted marking used for electronic 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 press against the valves the least when the data matrix coding 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.
   Fig 1: Identifying Camshaft Position For Cylinders 1 To 4

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   Fig 2: Identifying Camshaft Position For Cylinders 5 To 8

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   Fig 3: Camshaft Identification On V8 Turbo Engine

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   1. Cylinders 1 to 4
   2. Cylinders 5 to 8
   1. Outlet camshaft identification (green)
   2. Intake camshaft identification (blue)
   3. Intake camshaft identification (blue)
   4. Outlet camshaft identification (green)
      Fig 4: Camshaft Identification On V8 Naturally Aspirated Engine

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   1. Cylinders 1 to 4
   2. 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 bearing covers correctly and screw down. The bearing covers are numbered and marked with E (intake) or A (outlet). Camshaft bearing cover identification. Fit camshaft bearing covers evenly and gradually, and slowly tighten to the specified tightening torque. The camshafts must not be strained or tilted. Outlet camshafts and intake camshafts (also bank-specific) cannot be used interchangeably because of the bearing locations and length.
   Fig 5: Camshaft Bearing Cover Identification

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

   Pfeil  - Direction of travel

   Fig 6: Exploded View Of Camshaft Mount (Cylinder Bank 1 To 4)

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   1. Screw, M6 x 35 → Tightening torque: 13 Nm (9.5 ft lbs.) 
   2. Bearing cover
   3. Dowel sleeve
   4. Bearing cover (intake)
   5. Bearing cover (outlet)
   6. Screw, M6 x 70 → Tightening torque: 13 Nm (9.5 ft lbs.) 
   7. Bearing surfaces (oil with engine oil)
   1. Direction of travel
      Fig 7: Exploded View Of Camshaft Mount (Cylinder Bank 5 To 8)

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   1. Dowel sleeves
   2. Bearing cover (intake)
   3. Screw, M6 x 70 → Tightening torque: 13 Nm (9.5 ft lbs.) 
   4. Bearing cover
   5. Screw, M6 x 35 → Tightening torque: 13 Nm (9.5 ft lbs.) 
   6. Bearing cover (outlet)
   7. Bearing surfaces (oil with engine oil)
   1. Direction of travel