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Home >> Mini >> 2010 >> Cooper S, 2D Hatchback, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2592 (Engine - Repair - N52 - E90) >> Cylinder Head And Cylinder Head Cover >> 11 12 100 Removing and installing cylinder head (N52K) >> Replace aluminium screws

Replace aluminium screws

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 328xi, and 2010 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Observe different bolt heads.

Release cylinder head bolts (1) M10 with special tool 11 8 580 .

Release cylinder head bolts (2) M9 with special tool 11 4 420 .

NOTE: Picture shows intake and exhaust camshafts removed.
Fig 1: Removing Cylinder Head Bolts Using Special Tools
G04751041Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Observe different M9 bolt lengths (1 and 3).

Undo cylinder head bolts (1 and 3) M9 using special tool 11 4 420 .

Tightening torque 11 12 2AZ .

Release cylinder head bolts (2) M10 with special tool 11 8 580 from outside inwards.

Fig 2: Releasing Cylinder Head Bolts Using Special Tools
G04751042Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 11 12 1AZ .

IMPORTANT: All cylinder head bolts (1, 2 and 3) must be replaced.
Joining torque and angle of rotation must be observed without fail.

Risk of damage! 

Secure special tool 11 0 320 with existing cylinder head cover bolts (1).

Tightening torque 11 12 5AZ .

IMPORTANT: Removing and install cylinder head with a second person helping.
Weight of cylinder head with add-on parts is approx. 40 kg.
Do not rest cylinder head on sealing surface. Risk of damage to valves! 
Fig 3: Identifying Special Tool 11 0 320 With Mounting Bolts
G04751043Courtesy of BMW OF NORTH AMERICA, INC.

Insert 11 4 430 special tool into bores.

Fig 4: Inserting Special Tool 11 4 430 Into Bores
G04751049Courtesy of BMW OF NORTH AMERICA, INC.

Remove coarse residues on sealing surfaces with special tool 11 4 471 from cylinder head and crankcase.

IMPORTANT: Do not use any metal-cutting tools.
Fig 5: Remove Coarse Residues On Sealing Surfaces Using Special Tool 11 4 471
G04751045Courtesy of BMW OF NORTH AMERICA, INC.

Remove fine residues on sealing surfaces with special tool 11 4 472 from cylinder head and crankcase.

IMPORTANT: Do not use any metal-cutting tools.
Fig 6: Remove Fine Residues On Sealing Surfaces Using Special Tool 11 4 472
G04751046Courtesy of BMW OF NORTH AMERICA, INC.

There must be no fluids or contaminants in any of the threaded holes (1) for the cylinder head bolt connections.

Risk of corrosion and cracking! 

Clean all threaded holes.

Replace CYLINDER HEAD GASKET  .

Fig 7: Identifying Threaded Hole
G06904114Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Observe sequence for tightening cylinder head bolts without fail.

Fit new cylinder head screws.

Insert cylinder head bolts (1 to 10) with special tool 11 8 580 .

Tightening torque 11 12 1AZ

Fig 8: Cylinder Head Bolts Tightening/Loosening Sequence
G04751047Courtesy of BMW OF NORTH AMERICA, INC.

Insert cylinder head bolts (11 to 14) with special tool 11 4 420 .

Tightening torque 11 12 2AZ .

NOTE: Picture shows intake and exhaust camshafts removed.
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