11 12 100 Removing and installing cylinder head (M57T2)

Necessary preliminary tasks:

Remove CYLINDER HEAD COVER
Drain coolant. See 17 00 005 DRAINING AND ADDING COOLANT (M57T2) .
Remove AIR CONDITIONING COMPRESSOR DRIVE BELT
Remove DRIVE BELT FOR ALTERNATOR
Remove vacuum pump.
Remove CAMSHAFTS

IMPORTANT: Fit new cylinder head bolts.
Do not wash off bolt coating.

There must be no oil or coolant in the blind holes (risk of cracking).

Protect alternator against engine oil and coolant. (Risk of damage).

Cover alternator with suitable apparatus.

Assemble charge air hoses without grease and dry.

Slacken bolts (1) and (2) on exhaust turbocharger (3).

Fig 1: Identifying Bolts On Exhaust Turbocharger

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken clamp (1) and release turbocharger from exhaust manifold.

Installation note:

If necessary, replace clamp.

Fig 2: Identifying Turbocharger Clamp

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Release screws (3) on cylinder head at rear.

Fig 3: Identifying Screws On Cylinder Head

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Remove all finger rockers (1) and set down in order.

Remove all compensating elements (2) and set down in order.

IMPORTANT: Worn rockers may only be reused on the same grooves of the camshaft.

Fig 4: Removing Finger Rockers And Compensating Elements

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Fig 5: Identifying Screws

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Unfasten cylinder head bolts from outside to inside in following sequence 14... 1.

Installation note:

Fit new cylinder head bolts.

Fig 6: Cylinder Head Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The glow plugs protrude at the sealing face and may be damaged when the cylinder head is put down.
If necessary, remove glow elements with special tool 11 6 050.
Tightening torque, see 12 23 2AZ in 12 23 PREHEATER PLUGS .
Remove cylinder head.

Fig 7: Locating Glow Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Remove cylinder head gasket (1).

Installation note:

Observe number of holes (2) of cylinder head gasket.

Remove all traces of oil and coolant from all threaded blind holes (3) in crankcase.

Clean sealing surface (4).

Fig 8: Identifying Cylinder Head Gasket Holes And Threaded Blind Holes On Crankcase

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Clean sealing face of cylinder head and engine block.

Remove gasket remnants with hardwood spatula.

If the piston clearance is changed (e.g. replacing piston)

the CYLINDER HEAD GASKET THICKNESS must be recalculated.

NOTE: Joints between gear case cover and engine block are sealed with sealing strips stuck on as standard.
It is not necessary to apply a permanently elastic sealant.

Fig 9: Locating Sealant Applying Joints Of Gear Case Cover And Engine Block