11 12 105 Removing and installing left cylinder head (S63T 0)

Special tools required: 

• 11 4 470
• 81 22 2 184 136 (lifting table)

Necessary preliminary tasks: 

• Remove front axle completely with engine and transmission. See 31 10 001 COMPLETELY REMOVING AND INSTALLING THE FRONT AXLE WITH ENGINE AND TRANSMISSION (S63T0, MANUAL GEARBOX)  or 31 10 001 COMPLETELY REMOVING AND INSTALLING FRONT AXLE WITH ENGINE AND TRANSMISSION (S63T0, DKG) .

  Removed engine on table lift special tool 81 22 2 184 136.

  Illustration E72.

  Fig 1: Identifying Front Axle Removed With Engine/Transmission On Lifting Table

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Necessary preliminary tasks: 

• Check TIMING on left.
• REMOVE INTAKE AND EXHAUST CAMSHAFT ADJUSTERS ON LEFT SIDE .
• Remove both exhaust manifolds. See 18 40 010 REMOVE/INSTALL/REPLACE EXHAUST MANIFOLD AT LEFT (S63 B44 T 0/2) and 18 40 020 REMOVE AND INSTALL/REPLACE RIGHT EXHAUST MANIFOLD (S63 B44 T 0/2) .

Release screw (1).

Fig 2: Identifying Screw Location

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Release bolts (1) at front from cylinder head.

Fig 3: Identifying Bolts At Front Cylinder Head

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Unfasten hose clamp (1).

Detach coolant hose (2).

Fig 4: Identifying Coolant Hose And Clamp

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Release cylinder head bolts in sequence (10 to 1).

Remove all cylinder head bolts with washers.

Fig 5: Left Cylinder Head Bolts Tightening/Loosening Sequence (S63T O)

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Clean sealing faces of cylinder head and engine block; if necessary, remove gasket debris compound with special tool 11 4 470 . Make sure no gasket remnants drop into oil and cooling channels.

Check CYLINDER HEAD  for leaks.

Check CYLINDER HEAD SEALING FACE  for surface evenness.

Coat joint between engine block and gear case cover with DREI BOND 1209 2.1 .

Fig 6: Identifying Sealing Joint Between Engine Block And Timing Case Cover

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Check fitting sleeves (1) for damage and correct installation position.

Installation note: 

Renew cylinder head gasket (2). 

Fit new cylinder head gasket (2).

Fig 7: Identifying Cylinder Head Gasket And Fitting Sleeves

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Installation note: 

Fit new cylinder head screws. 

Put the cylinder head on.

Do not wash off bolt coating.

Insert cylinder head bolts and initially tighten so that they are free of play.

Apply cylinder head bolts in the sequence 1 - 10 and fit with 30 Nm.

Fig 8: Left Cylinder Head Bolts Tightening/Loosening Sequence (S63T O)

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Installation note: 

Mark cylinder head bolt (1) with a colored mark for a better check of angle tightening.

Fig 9: Identifying Cylinder Head Bolt

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Tighten down cylinder head bolts in sequence 1 - 10.

Tightening torque 11 12 1AZ .

Fig 10: Left Cylinder Head Bolts Tightening/Loosening Sequence (S63T O)

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Install and tighten down bolts (1) between cylinder head and timing case cover.

Tightening torque 11 12 2AZ .

Fig 11: Identifying Bolts At Front Cylinder Head

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Insert screw (1) of guide rail and tighten down.

Tightening torque 11 31 3AZ .

Fig 12: Identifying Screw Location

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If necessary, install camshafts. See 11 31 036 REMOVING AND INSTALLING/REPLACING LEFT EXHAUST CAMSHAFT (S63T 0) and 11 31 032 REMOVING AND INSTALLING/REPLACING THE LEFT INTAKE CAMSHAFT (S63T0) .

Install left INLET AND EXHAUST ADJUSTMENT UNITS .

Assemble engine.