11 12 100 Removing and installing the cylinder head (M57T2-SCR)

Necessary preliminary work:

Drain coolant. See 17 00 005 DRAINING AND ADDING COOLANT (M57T2) .
Remove DRIVE BELT FOR ALTERNATOR
Remove LOW-PRESSURE TURBOCHARGER
Remove camshafts (M57T2)

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 auxiliary materials.

Assemble charge air hoses without grease and dry.

Remove all rocker arms (1) and set down in order.

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

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

Fig 1: Removing Finger Rockers And Compensating Elements

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Fig 2: 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 3: Cylinder Head Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The glow elements protrude at the sealing surface 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 PREHEATER PLUGS .
Remove cylinder head.

Fig 4: Locating Glow Plug

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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 blind hole threaded holes (3) in crankcase.

Clean sealing surface (4).

Fig 5: Identifying Cylinder Head Gasket Holes And Threaded Blind Holes On Crankcase

Courtesy of BMW OF NORTH AMERICA, INC.

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

Remove gasket remnants with hardwood scraper.

If the piston protrusion 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 6: Locating Sealant Applying Joints Of Gear Case Cover And Engine Block

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Check fitting bush (1) for damage and replace if necessary.

Transitions (2) must be absolutely free of grease.

Fit new cylinder head gasket.

Fig 7: Identifying Dowel Sleeve And Transitions

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Carefully fit cylinder head.

Fit new cylinder head bolts.

Tighten down the cylinder head bolts in order 1... 14.

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

Fig 8: Cylinder Head Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Use special tool 00 9 120 for torsion angle adjustment.

Fig 9: Tightening Torsion Angle Using Special Tool (00 9 120)

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Tighten down screws (1).

Fig 10: Identifying Screws

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Installation note:

Worn rocker arms may only be reused on the same grooves of the camshaft.

Oil camshaft bearing positions and bearing caps.

Install all rocker arms and compensating elements.

Fig 11: Identifying Oil Camshaft Bearings And Bearing Caps

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.