11 12 105 Removing and installing left cylinder head (N63)

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Special tools required:

11 4 470

See ENGINE - SPECIAL TOOLS (N54, N63) .

Necessary preliminary tasks:

Check timing .
Remove left inlet and exhaust adjustment unit

Release screw (1).

NOTE: Guide rail is loose from cylinder head.

Fig 1: Identifying Cylinder Head Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolts (1) at front from cylinder head.

Fig 2: Identifying Timing Case Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

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

Remove all cylinder head bolts with washers.

NOTE: For purposes of clarity, the graphic shows the camshafts removed.

Fig 3: Left Cylinder Head Bolts Tightening/Loosening Sequence (N63)

Courtesy of BMW OF NORTH AMERICA, INC.

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

IMPORTANT: Danger of cracking!

Threaded bores in engine block must be free of dirt and oil

Check cylinder head for leaks.

Check cylinder head sealing face for surface evenness.

Coat joint between engine block and timing case cover with Drei Bond 1209).

NOTE: Graphic shows an N62 engine by way of example.

Fig 4: Identifying Coat Joint

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation:

Replace cylinder head gasket (2) .

Fit new cylinder head gasket (2).

Fig 5: Identifying Cylinder Head Gasket And Dowel Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Graphic corresponds to cylinders 1-4.

Put the cylinder head on.

Do not wash off bolt coating.

Installation:

Fit new cylinder head screws .

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

Tighten down cylinder head bolts in sequence 1 - 10.

Tightening torque 11 12 1AZ, see CYLINDER HEAD WITH COVER

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

Courtesy of BMW OF NORTH AMERICA, INC.

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

Tightening torque 11 12 2AZ, see CYLINDER HEAD WITH COVER

Fig 7: Identifying Timing Case Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

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

Tightening torque 11 31 3AZ, see 11 31 CAMSHAFT

Fig 8: Identifying Guide Rail Screw

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, install camshafts .

Install left inlet and exhaust adjustment unit .

Assemble engine.