11 12 105 Removing And Installing Left Cylinder Head (N62 From 9/03 And N62TU)

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(cylinder bank 5 to 8)

NOTE:

To remove the exhaust manifolds, the engine must be secured in the installation position with the special tool and then the front axle bracket lowered.

Remove left exhaust manifold.

After removing exhaust manifolds:

Reinstall front axle bracket provisionally and remove special tool for securing engine in installation position.

Open drain plug for coolant on left side of engine block.

Drain off coolant and dispose of correctly.

Installation:

Replace sealing ring.

Tightening torque of drain plug 11 11 5AZ . See ENGINE BLOCK for specs.

Top up coolant. Vent cooling system and check for leaks. See VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62) or VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62, N62TU) .

Remove ignition coils on cylinder bank 5 to 8.

Remove SERVOMOTOR FOR LEFT ECCENTRIC SHAFT .

Remove INTAKE AIR MANIFOLD .

Remove LEFT CYLINDER HEAD COVER .

Remove LEFT TIMING CASE COVER .

Disconnect plug connections and lay engine wiring harness to one side.

Remove spark plugs on cylinder bank 5 to 8.

Remove vent hose on cylinder head.

NOTE:

Illustration with engine removed.

Detach hose (1) on check valve (2).

E65 only:

Release screws (3).

Remove tube (4) with check valve (2).

Fig 1: Identifying Hose, Check Valve, Tube And Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Do not remove guide tube (5) for oil dipstick.

Installation:

Replace sealing ring on tube (4) and coat with antiseize agent.

Removal:

Removal of cylinder head is described separately from installation.

Remove INLET AND EXHAUST ADJUSTMENT UNIT ON LEFT SIDE .

NOTE:

Illustration with engine removed.

Remove eccentric shaft sensor (2).

Fig 2: Identifying Eccentric Shaft Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Detach guide rail from cylinder head.

Fig 3: Locating Guide Rail Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws between cylinder head and timing case cover.

Fig 4: Locating Timing Case Cover Screw

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

At narrow points, use a socket with 3/8" drive and a short extension.

Release cylinder-head bolts in sequence 10 ... 1.

Lift off cylinder head.

Lift off cylinder head gasket.

Fig 5: Left Cylinder Head Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Installation of cylinder head is described separately from removal.

Clean sealing faces of cylinder head and crankcase; if necessary, remove gasket debris with wooden scraper.

Make sure no gasket debris drops into the oil and coolant ducts.

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

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

Fig 6: Locating Coat Joint Between Engine Block And Timing Case Cover

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fit new cylinder-head seal.

Fig 7: Identifying Dowel Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

Put the cylinder head on.

NOTE:

Do not wash off bolt coating. Insert new cylinder head bolts and initially tighten so that they are free of play.

At narrow points, use a socket with 3/8" drive and a short extension.

Tighten down the cylinder-head bolts in order 1 ... 10.

Tightening torque: 11 12 8AZ . See CYLINDER HEAD WITH COVER for specs.

Fig 8: Left Cylinder Head Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Insert and tighten down screws between cylinder head and timing case cover.

Fig 9: Locating Timing Case Cover Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement:

Insert screw plug (1).

Installation:

Failure to install the screw (1) will result in a malfunction in the VANOS control.

Fig 10: Identifying Screw Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Insert and tighten down guide rail screw.

Fig 11: Locating Guide Rail Screw

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Illustration with engine removed.

Install eccentric shaft sensor (2).

Fig 12: Identifying Eccentric Shaft Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Install INLET AND EXHAUST ADJUSTMENT UNIT ON LEFT SIDE .

Assemble engine.