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Removing and installing camshafts at cylinder head - AR05.20-P-6992-09A

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TORQUE SPECIFICATION CAMSHAFT, CAMSHAFT ADJUSTMENT

Number Designation Engine 120
BA05.20-P-1002-02F Bolt of camshaft bearing cap to cylinder head Nm 21
Fig 1: Identifying Double Open-End Wrench (104 589 01 01 00)
G04677358Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  1. Detaching camshafts  : use wrench 104 589 01 01 00 to rotate camshafts so that the tips of the cams at cylinders 3 and 9, respectively, (arrows) press onto the bucket tappets in the middle.
    Fig 2: Locating Camshafts - Shown, Right-Hand Cylinder Head
    G04677359Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  2. Unbolt camshaft bearing caps (arrows) except at cylinders 3 and 9, take off.

    IMPORTANT Remove camshaft bearing cap (15) together with detached left inlet camshaft (9).

    Fig 3: Locating Camshaft Bearing Caps - Shown, Left-Hand Cylinder Head
    G04677360Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  3. Slacken bolts of camshaft bearing caps (arrows) at cylinders 3 and 9 in steps of one turn.

    NOTESCamshafts must not be twisted when detaching the camshaft bearing caps (arrows)  .

  4. Remove camshaft bearing caps (arrows).
    Fig 4: Locating Camshaft Bearing Caps - Shown, Right-Hand Cylinder Head
    G04677361Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  5. Take off inlet and exhaust camshafts.
  6. Inspect ease of movement of bucket tappets.

    Attaching camshafts 

  7. Oil all bearing points and bucket tappets.
  8. Insert inlet and exhaust camshafts into the bearing points; the tips of the cams should be pointing down centered at cylinders 3 and 9, respectively.
  9. Align inlet and exhaust camshafts axially at the axial bearing (arrows).
    Fig 5: Locating Axial Bearing
    G04677362Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  10. Install camshaft bearing caps (arrows) at cylinders 3 and 9 and tighten bolts in steps of one turn, tightening torque.

    NOTESCamshafts must not be twisted when bolting on the camshaft bearing caps  .

    Fig 6: Locating Camshaft Bearing Caps
    G04677363Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  11. Hold camshafts with wrench (25) 104 589 01 01 00 when bolting on the camshaft bearing caps at cylinders 3 and 9 so that the tips of the cams are pointing down centered.
    Fig 7: Holding Camshafts With Wrench
    G04677364Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  12. Install the remaining camshaft bearing caps (arrows) and tighten.
    Fig 8: Locating Camshaft Bearing Caps
    G04677365Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
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