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Home >> Mercedes Benz >> 2012 >> Sprinter 2500, Van Crew Extended >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Air Intake, Turbo Charging -- Model 906 (Engine 642) >> Testing & Repair >> Replace Seal Between Turbocharger & Exhaust Collector - Ar09.40-S-6024-15SE

Replace Seal Between Turbocharger & Exhaust Collector - Ar09.40-S-6024-15SE

TURBOCHARGER TO EXHAUST COLLECTOR PIPE BOLT TORQUE SPECIFICATIONS - ENGINE 642 IN MODEL 906

Number Designation Engine 642 in model 906
BA09.40-N-1004-01Q Bolt, turbocharger to exhaust collector pipe Stage 1 Nm 20
Stage 2 Degrees 90
  1. Clamp exhaust collector pipe with exhaust gas turbocharger on flange (1) into vise.

    IMPORTANT Aid of helper required.

  2. Unscrew bolts (2, 3) and remove exhaust gas turbocharger from exhaust collector pipe

    IMPORTANT Aid of helper required. Observe installation position of seal.

  3. Clean sealing surfaces.
    Fig 1: Identifying Exhaust Collector Pipe Bolt & Exhaust Gas Turbocharger Flange
    G08211421Courtesy of MERCEDES-BENZ USA
    Fig 2: Replacing Seal Between Turbocharger & Exhaust Collector
    G08211422Courtesy of MERCEDES-BENZ USA
  4. Install new seal between exhaust collector and turbocharger.

    IMPORTANT Observe installation position of hole pattern on seal.

  5. Screw in bolts (2, 3) finger-tight.

    IMPORTANT It must be possible to move the exhaust gas turbocharger in the direction of the exhaust collector pipe.

  6. Install exhaust gas turbocharger with old seal on oil supply connection fitting
  7. Screw exhaust collector pipe alternately on right and left exhaust manifold to old seal hand-tight.
  8. Tighten bolts (2) fully.

    NOTES Displacement between exhaust collector pipe and exhaust gas turbocharger leads to tension which can cause considerable engine damage

    IMPORTANT Observe tightening torque.

  9. Loosen bolts between exhaust collector pipe and exhaust manifold again.
  10. Remove exhaust gas turbocharger from oil supply connection fittings.
  11. Carefully remove turbocharger with exhaust collector.

    NOTES Displacement between exhaust collector pipe and exhaust gas turbocharger leads to tension which can cause considerable engine damage

  12. Clamp exhaust collector pipe with exhaust gas turbocharger on flange (1) into vise and carefully tighten bolt (3).

    NOTES Displacement between exhaust collector pipe and exhaust gas turbocharger leads to tension which can cause considerable engine damage

    IMPORTANT Helper required and observe tightening torque.

  13. Remove exhaust gas turbocharger with exhaust collector pipe from vise.

IMPORTANT Aid of helper required.