11 12 106 Removing and installing right cylinder head (N63O1)

Special tools required: 

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

Necessary preliminary tasks: 

• Remove front axle completely with engine and transmission.

  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 .
• Remove INLET AND EXHAUST ADJUSTMENT UNIT ON RIGHT SIDE .
• Remove right exhaust manifold. See 18 40 020 REMOVING AND INSTALLING/RENEWING RIGHT EXHAUST MANIFOLD (N63 B40/B44 O 1) .

Remove screw (1) of guide rail.

Fig 2: Identifying Guide Rail Screw

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Release hose clamp (1) on bank 1.

Detach coolant hose (2).

Fig 3: Identifying Coolant Hose And Clamp

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Release bolts (1) at front from cylinder head.

Fig 4: Identifying Bolts At Front Cylinder Head

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Twist camshaft (1) on hexagon head (2) by 180°.

Fig 5: Identifying Camshaft Hexagon Head Location

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All cylinder head bolts on the intake side are accessible in this position.

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

Remove all cylinder head bolts with washers.

Fig 6: Right Cylinder Head Bolts Tightening/Loosening Sequence (N63 O1)

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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 debris drops into the oil and coolant ducts.

Threaded holes in engine block must be free of dirt and oil. (risk of cracking)  .

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 7: Identifying Sealing Joint Between Engine Block And Timing Case Cover

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

Fit new cylinder head gasket (2).

Fig 8: 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 9: Right Cylinder Head Bolts Tightening/Loosening Sequence (N63 O1)

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Installation note: 

Mark cylinder head bolt (1) with a colored mark to check the angle tightening more effectively.

Fig 10: Identifying Cylinder Head Bolt

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

Tightening torque: 11 12 1AZ .

Fig 11: Right Cylinder Head Bolts Tightening/Loosening Sequence (N63 O1)

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Twist back camshaft (1) on hexagon head (2) by 180°.

Fig 12: Identifying Camshaft Hexagon Head Location

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

Tightening torque: 11 12 2 AZ .

Fig 13: Identifying Bolts At Front Cylinder Head

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

Tightening torque: 11 31 3 AZ .

Fig 14: Identifying Guide Rail Screw

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If necessary, install camshafts. See 11 31 034 REMOVING AND INSTALLING/REPLACING RIGHT INLET CAMSHAFT (N63O1) and 11 31 038 REMOVING AND INSTALLING/RENEWING RIGHT EXHAUST CAMSHAFT (N63O1) .

Install INTAKE AND EXHAUST CAMSHAFT ADJUSTERS ON RIGHT SIDE .

Assemble engine.