11 12 105 Removing and installing left cylinder head (N62 from 9/03)

WARNING: This page is about a different variant/trim than selected.

(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. See FRONT AXLE SUPPORT .

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. See ENGINE - TIGHTENING TORQUES .

Top up coolant. Vent cooling system and check for leaks.

Remove ignition coils on cylinder bank 5 to 8. See IGNITION COIL .

Remove servomotor for left eccentric shaft.

Remove left cylinder head cover .

Remove intake air manifold .

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).

Installation:

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

Removal:

Removal of cylinder head is described separately from installation.

Fig 1: Removing Tube With Check Valve

Courtesy of BMW OF NORTH AMERICA, INC.

Remove inlet and exhaust adjustment unit on left side.

NOTE: Illustrations are with engine removed.

Remove eccentric shaft sensor (2).

Fig 2: Removing Eccentric Shaft Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Detach guide rail from cylinder head.

Fig 3: Removing Guide Rail From Cylinder Head

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws between cylinder head and timing case cover.

Fig 4: Releasing Screws Between Cylinder Head And Timing Case Cover

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: Releasing Cylinder-Head Bolts

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: Coating Joint Between Engine Block And Timing Case Cover With Drei Bond 1209