11 12 106 Removing And Installing Right Cylinder Head (N62 From 9/03 And N62TU)

(cylinder bank 1 to 4)

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 right 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 right side of engine block.

Drain off coolant and dispose of correctly.

Installation:

Replace sealing ring.

Tighten drain plug. Tightening torque. 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 1 to 4.

Remove servomotor for right eccentric shaft. See 11 37 024 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT (N62/N62TU) .

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

Remove right cylinder head cover. See 11 12 006 REMOVING AND INSTALLING/SEALING RIGHT CYLINDER HEAD COVER (N62/N62TU) .

Remove right timing case cover. See 11 14 085 REMOVING AND INSTALLING TOP RIGHT TIMING CASE COVER (N62 / N62TU) .

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

Remove spark plugs on cylinder bank 1 to 4.

Remove vent hose on cylinder head.

NOTE: Illustration with engine removed.

Detach hose (1) on check valve (4).

Unfasten screws (2).

Fig 1: Identifying Hose On Check Valve

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: A spacer bushing is secured with screw (3) behind tube (5).

Release screw (3) and remove check valve (4), tube (5) and spacer bushing.

Unclip cables (6 and 7).

Installation:

Replace sealing ring on tube (5) and coat with antiseize agent.

Removal:

Removal of cylinder head is described separately from installation.

Remove inlet and exhaust adjustment unit on right side. See 11 36 048 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON RIGHT SIDE (N62/N62TU) .

Slacken off chain tensioning piston (1) by approx. one turn.

Fig 2: Identifying Chain Tensioning Piston

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Illustration with engine removed.

Remove eccentric shaft sensor (2).

Fig 3: Identifying Eccentric Shaft Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Detach guide rail from cylinder head.

Fig 4: Identifying Guide Rail Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws between cylinder head and timing case cover.

Fig 5: 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 to 1). See Fig 6.

Lift off cylinder head.

Lift off cylinder head gasket.

Fig 6: Right Cylinder Head Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Remove chain tensioning piston (1).

Fig 7: Identifying Chain Tensioning Piston

Courtesy of BMW OF NORTH AMERICA, INC.

Place chain tensioning piston (1) on a level surface and compress slowly and carefully.

Repeat this procedure twice.

Fig 8: Placing Chain Tensioning Piston On Level Surface

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).

Replace sealing ring.

Install chain tensioning piston (1) and initially tighten screw connection without play.

Fig 9: Identifying Chain Tensioning Piston

Courtesy of BMW OF NORTH AMERICA, INC.

Coat joint between engine block and timing case cover with Drei Bond 1209 (refer to BMW Parts Service).

Fig 10: 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 11: 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. See ENGINE - TIGHTENING TORQUES -- ALPINA .

Fig 12: Right 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 13: 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 14: Identifying Screw Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Insert and tighten down guide rail screw.

Fig 15: Identifying Guide Rail Screw

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Illustration with engine removed.

Install eccentric shaft sensor (2).

Fig 16: Identifying Eccentric Shaft Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down chain tensioning piston (1).

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

Fig 17: Identifying Chain Tensioning Piston

Courtesy of BMW OF NORTH AMERICA, INC.

Install inlet and exhaust adjustment units on right side. See 11 36 048 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON RIGHT SIDE (N62/N62TU) .

Assemble engine.