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

(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. See 18 40 020 REMOVING AND INSTALLING/REPLACING RIGHT EXHAUST MANIFOLD (N62, N62TU) .

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 -- ALPINA .

Top up coolant. Vent cooling system and check for leaks. See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62, N62TU) .

Remove ignition coils on cylinder bank 5 to 8.

Remove servomotor for left eccentric shaft. See 11 37 022 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR LEFT ECCENTRIC SHAFT (N62/N62TU) .

Remove intake air manifold. See 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N62) .

Remove left cylinder head cover. See 11 12 005 REMOVING AND INSTALLING/SEALING LEFT CYLINDER HEAD COVER (N62/N62TU) .

Remove left timing case cover. See 11 14 080 REMOVING AND INSTALLING TOP LEFT TIMING CASE COVER (N62/N62TU) .

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).

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

Fig 1: Identifying Hose On Check Valve

Courtesy of BMW OF NORTH AMERICA, INC.

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. See 11 36 047 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON LEFT SIDE (N62/N62TU) .

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: Identifying Guide Rail Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws between cylinder head and timing case cover.

Fig 4: Identifying 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: 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 (refer to BMW Parts Service).

Fig 6: Identifying 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. See Fig 8.

Tightening torque. See ENGINE - TIGHTENING TORQUES -- ALPINA .

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: Identifying Screws Between Cylinder Head And Timing Case Cover

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: Identifying 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. See 11 36 047 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON LEFT SIDE (N62/N62TU) .

Assemble engine.