11 12 517 Removing and installing both cylinder heads (S62)

WARNING: This page is about a different car, the 2003 BMW Z8, 2002 BMW Z8, 2001 BMW Z8, and 2000 BMW Z8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 1 450
00 9 120
11 0 081
11 0 082
11 0 250
11 2 250
11 2 300
11 7 120
11 7 130
11 7 150
11 7 200
12 6 050
12 6 410
12 6 411

NOTE: The cylinder heads can also be removed and installed inside the vehicle. To improve access, it is advantageous to remove the engine.

Remove intake air manifold. Refer to 11 61 050 Removing and installing intake air manifold (S62) .

Remove engine wiring harness with cable channels from engine.

Remove left exhaust manifold.

Suspend special tool 11 0 250 from front and rear lugs for raising engine and raise engine.

Remove guide tube for oil dipstick.

Remove bearing pedestal for A/C compressor.

Fit special tool 11 0 081.

Fig 1: Fitting Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Remove engine support on cylinder bank 5 to 8.

Fig 2: Removing Engine Support

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace sealing rings, ensure that seals are correctly located and, if necessary, secure with grease.

Fig 3: Replacing Sealing Rings

Courtesy of BMW OF NORTH AMERICA, INC.

Fit special tool 11 0 082.

Fig 4: Fitting Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Install engine in special tool 00 1 450.

Fig 5: Installing Engine In Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Snap locking pin (1) into place.

Close locking detent (2) on right and left and screw down.

Remove both cylinder head covers.

Remove all spark plugs.

Remove complete fuel line holder.

Remove throttle actuator. Refer to 12 72 010 REMOVING AND INSTALLING/REPLACING THROTTLE ACTUATOR (S62) .

CAUTION: The work step Removing and installing throttle actuator describes important instructions on installing the pull rods and throttles.

Remove idling speed control valve. Remove molded hoses from supplementary air distributor to tank venting valve and throttles.

Remove knock sensor cable guide from return line (cylinder bank 5 to 8).

Disconnect vacuum hose for pressure regulator.

Disconnect vacuum hoses to solenoid-operated valve.

Remove heating feed line from engine block and from both return lines on cylinder heads.

Remove coolant thermostat.

Fig 6: Removing Coolant Thermostat

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace O-rings (1).

Remove oil lines (1) from cylinder head on cylinder banks 1 to 4 and 5 to 8.

NOTE: The oil lines (1) of cylinder banks 1 to 4 and 5 to 8 are different.

Fig 7: Removing Oil Lines

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Joint removal and installation of the cylinder heads on cylinder banks 1 to 4 and 5 to 8 requires a step-by-step procedure.
The work steps alternate between the cylinder heads on cylinder banks 1 to 4 and 5 to 8.

Removal

Removal of cylinder heads is described separately from installation.

Cylinder bank 1 to 4:

Remove bracket (1) for cable channel.

Fig 8: Removing Bracket For Cable Channel

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

NOTE: Cylinder head bolts on cylinders 4 and 8 are only accessible after signal rings have been removed.

CAUTION: Risk of damage to pulse generators (2).

Remove pulse generator (2) of exhaust and inlet camshafts or release screws (1) with a long socket.

NOTE: For purposes of picture clarity, the lug for raising the engine is not shown.

Fig 9: Removing Pulse Generators

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Grip camshaft at hexagon head and release banjo bolt (1).

Remove signal rings.

Fig 10: Removing Signal Rings

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

CAUTION: Risk of damage to pulse generators (2).

Remove pulse generator (2) of exhaust and inlet camshafts or release screws (1) with a long socket.

Fig 11: Removing Pulse Generators

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Grip camshaft at hexagon head and release banjo bolt (1).

Remove signal rings.

Fig 12: Removing Signal Rings

Courtesy of BMW OF NORTH AMERICA, INC.

When the engine is switched off, VANOS moves the camshafts to a position which is advantageous to engine starting.

CAUTION: Before the VANOS adjustment unit is removed, the camshafts on both cylinder banks must be rotated back to their initial position.

Rotate crankshaft in direction of rotation as far as ignition TDC position of cylinder 1. Secure vibration damper in position with special tool 11 2 300.

Fig 13: Securing Vibration Damper

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Cylinder bank 1 to 4:

Remove oil line from VANOS adjustment unit.

Fig 14: Removing Oil Line From Vanos Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Fit special tool 11 7 130 to VANOS adjustment unit.

Connect compressed air (2 to 8 bar).

Fig 15: Connecting Compressed Air

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Cylinder bank 1 to 4:

Disconnect plug connection for solenoid valves on cylinder bank 1 to 4.

Connect special tool 12 6 050 in conjunction with special tool 12 6 411 (from special tool kit 12 6 410) to solenoid valves on cylinder bank 1 to 4. Connect special tool 12 6 411 to correct terminals on car battery.

Alternately press toggle switch buttons 1 and 2 several times on special tool 12 6 050.

Fig 16: Connecting Special Tool To Solenoid Valves

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Do not damage the cylinder head.
If necessary, machine open-end wrench accordingly.

Fig 17: Fitting Open-End Wrench

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Press and hold down toggle switch button 1 on special tool 12 6 050.

At same time, rotate inlet camshaft at hexagon drive against direction of rotation as far as it will go.

NOTE: Spline teeth in VANOS gear are engaged; and inlet camshaft cannot be rotated further.

Fig 18: Rotating Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Alternately press toggle switch buttons 3 and 4 several times on special tool 12 6 050.

Fig 19: Pressing Toggle Switch Buttons

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Cylinder bank 1 to 4:

Press and hold down toggle switch button 3 on special tool 12 6 050.

At same time, rotate exhaust camshaft at hexagon drive against direction of rotation as far as it will go.

Fig 20: Rotating Exhaust Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Spline teeth in VANOS gear are engaged; and exhaust camshaft cannot be rotated further.

Cylinder bank 5 to 8:

Remove oil line from VANOS adjustment unit.

Fig 21: Removing Oil Line From Vanos Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Fit special tool 11 7 130 to VANOS adjustment unit.

Connect compressed air (2 to 8 bar).

Fig 22: Fitting Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Unclip plug connection for solenoid valves on cylinder bank 5 to 8 from bracket.

Connect special tool 12 6 050 in conjunction with special tool 12 6 411 (from special tool kit 12 6 410) to solenoid valves on cylinder bank 5 to 8. Connect special tool 12 6 411 to correct terminals on car battery.

Alternately press toggle switch buttons 4 and 3 several times on special tool 12 6 050.

Fig 23: Connecting Special Tool To Solenoid Valves

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Press and hold down toggle switch button 4 on special tool 12 6 050.

At same time, rotate inlet camshaft at hexagon drive against direction of rotation as far as it will go.

NOTE: Spline teeth in VANOS gear are engaged; and inlet camshaft cannot be rotated further.

Fig 24: Rotating Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Alternately press toggle switch buttons 2 and 1 several times on special tool 12 6 050.

Fig 25: Pressing Toggle Switch Buttons

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Press and hold down toggle switch button 2 on special tool 12 6 050.

At same time, rotate exhaust camshaft at hexagon drive against direction of rotation as far as it will go.

NOTE: Spline teeth in VANOS gear are engaged; and exhaust camshaft cannot be rotated further.

Fig 26: Rotating Exhaust Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 2 300. Rotate crankshaft in direction of rotation a further revolution up to overlap TDC position.

Cylinder bank 1 to 4:

Slacken six accessible bolts two turns.

Fig 27: Locating Accessible Bolts

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Cylinder bank 5 to 8:

Slacken six accessible bolts two turns.

Fig 28: Locating Accessible Bolts

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Crank engine at central bolt in direction of rotation until 1st cylinder is at TDC firing position. Secure vibration damper in position with special tool 11 2 300.

Fig 29: Securing Vibration Damper

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Cylinder bank 1 to 4:

Slacken remaining six bolts two turns.

Fig 30: Slacking Remaining Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Slacken remaining six bolts two turns.

Fig 31: Slacking Remaining Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

NOTE: The camshafts have an opening. The 1st bearing caps have a locating bore.

Align camshaft opening to locating bore in bearing cap and secure in position with special tool 11 7 120.

Fig 32: Aligning Camshaft Opening

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Align camshaft opening to locating bore in bearing cap and secure in position with special tool 11 7 120.

Fig 33: Aligning Camshaft Opening

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Release screws on VANOS adjustment unit.

Fig 34: Releasing Screws On Vanos Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Carefully lever out VANOS adjustment unit at "intended" openings with a screwdriver on left and right.

Fig 35: Levering Out Vanos Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Pull off VANOS adjustment unit.

Fig 36: Pulling OFF Vanos Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Release screws on VANOS adjustment unit.

Fig 37: Releasing Screws On Vanos Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Carefully lever out VANOS adjustment unit at "intended" openings with a screwdriver on left and right.

Fig 38: Levering Out VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Pull off VANOS adjustment unit.

Fig 39: Pulling Off Vanos Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 2 300.

Fig 40: Removing Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: No piston must be in the TDC position when the cylinder heads are removed.

When the VANOS adjustment unit is removed, the chain wheels of the inlet and exhaust camshafts are not non-positively connected to the camshafts. Camshafts do not rotate.

Crank engine at central bolt against direction of rotation to 45° before TDC position.

Fig 41: Cranking Engine At Central Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

Remove chain tensioning piston. Refer to 11 31 090 REMOVING AND INSTALLING/REPLACING PISTON FOR CHAIN TENSIONER (S62) .

Remove right timing case cover on cylinder bank 1 to 4.

Remove left timing case cover on cylinder bank 5 to 8. Refer to 11 14 080 Removing and installing timing case cover, top left (S62) .

Cylinder bank 1 to 4 (inlet side):

Remove slackened bolts. Take off spacer ring (1).

Fig 42: Taking Off Spacer Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

NOTE: The spline hub (1) accommodates a plate spring and a supporting ring.
Take care: the supporting ring can easily fall out when removed.

Remove spline hub (1) with plate spring and supporting ring.

Fig 43: Removing Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Detach inlet chain wheel (3) from centering sleeve.

Fig 44: Detaching Inlet Chain Wheel

Courtesy of BMW OF NORTH AMERICA, INC.

Keep inlet chain wheel (3) and chain tensioned.

Feed out inlet chain wheel (3).

Secure chain against slipping down.

Cylinder bank 5 to 8 (inlet side):

Remove slackened bolts. Take off spacer ring (1).

Fig 45: Taking Off Spacer Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

NOTE: The spline hub (1) accommodates a plate spring and a supporting ring.
Take care: the supporting ring can easily fall out when removed.

Remove spline hub (1) with plate spring and supporting ring.

Fig 46: Removing Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Detach inlet chain wheel (3) from centering sleeve.

Fig 47: Detaching Inlet Chain Wheel

Courtesy of BMW OF NORTH AMERICA, INC.

Keep inlet chain wheel (3) and chain tensioned.

Feed out inlet chain wheel (3).

Secure chain against slipping down.

Cylinder bank 5 to 8:

Detach sliding rail from cylinder head.

Fig 48: Detaching Sliding Rail

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: To release cylinder head bolts: Use special tool 11 2 250.
At narrow points, use a socket with 3/8" drive and a short extension.

Release cylinder head bolts on both cylinder heads in sequence 10 to 1.

Fig 49: Identifying Cylinder Head Bolts Removal Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Lift off cylinder heads.

Installation

Installation of cylinder heads is described separately from removal.

Clean sealing faces of cylinder heads and engine block, if necessary, remove gasket debris using a 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 50: Coating Joint

Courtesy of BMW OF NORTH AMERICA, INC.

Check dowel sleeves for damage and correct installation position.

Install new cylinder head seals.

Fig 51: Checking Dowel Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

Install cylinder heads. Install new cylinder head bolts. Do not wash off screw coating.

NOTE: To tighten down cylinder head bolts: Use special tool 11 2 250.
At narrow points, use a socket with 3/8" drive.
Use special tool 00 9 120 for torsion angle tightening.

Fig 52: Tightening Cylinder Head Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down cylinder head bolts on both cylinder heads in sequence 1 to 10.

Fig 53: Cylinder Head Bolts Tightening/Loosening Sequence (S62)

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque, 11 12 8AZ. Refer to 11 12 CYLINDER HEAD WITH COVER .

Cylinder bank 5 to 8:

Insert the screw and tighten down the slide rail.

Fig 54: Tightening Down Slide Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Pull up timing chain on both sides and keep tensioned.

Rotate crankshaft from 45° before TDC position in direction of rotation up to TDC firing position. Secure vibration damper in position with special tool 11 2 300.

Fig 55: Securing Vibration Damper

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Coat all sliding surfaces on VANOS gear with engine oil as antiseize agent.

Cylinder bank 5 to 8 (inlet side):

NOTE: The position of the bores in the inlet chain wheel (3) can be freely selected; they do not have to line up with the threads yet.

Feed timing chain onto inlet chain wheel (3).

Position inlet chain wheel (3) on centering sleeve. Do not insert "any" screws into inlet chain wheel (3) yet.

Fig 56: Positioning Inlet Chain Wheel

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Keep timing chain tensioned and feed on inlet chain wheel (3).

Position inlet chain wheel (3) on centering sleeve. Do not insert "any" screws into inlet chain wheel (3) yet.

Press tensioning rail against chain and keep tensioned.

Fig 57: Positioning Inlet Chain Wheel

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Check position of inlet chain wheel (3) to threads.

In event of large deviation (thread not visible):

Detach inlet chain wheel (3) from centering sleeve, realign chain wheel (3) and refit.

In event of small deviation:

Position special tool 11 7 150 at toothed sleeve on exhaust side.

Align secondary chain drive to bores of inlet chain wheel (3).

Fig 58: Aligning Secondary Chain Drive

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Version up to 9/2001

CAUTION: Risk of mixing up parts.

NOTE: Plate spring (2) and supporting ring (3) form a set and may only be fitted together.

Thickness of plate spring (2) = 0.85 mm.

Thickness of supporting ring (3) = 3.55 mm.

Fig 59: Identifying Plate Spring And Supporting Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Version from 9/2001

CAUTION: Risk of mixing up parts.

NOTE: Plate spring (4) and supporting ring (5) form a set and may only be fitted together.

Thickness of plate spring (4) = 1.25 mm.

Thickness of supporting ring (5) = 3.20 mm.

Plate spring (4) and supporting ring (5) may also be fitted in engine before 9/2001.

Fig 60: Identifying Plate Spring And Supporting Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Version up to 9/2001

CAUTION: Observe installation direction of plate spring (2).

NOTE: The small support diameter of the plate spring (2) points in the direction of the supporting ring (3). Supporting ring is supported with retaining lugs in spline hub (1).

Insert plate spring (2) and supporting ring (3) in spline hub (1).

Fig 61: Installing Plate Spring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Version from 9/2001

CAUTION: Observe installation direction of plate spring (4).

The small support diameter of the plate spring (4) points in the direction of the spline hub (1). Supporting ring is supported with retaining lugs in spline hub (1).

Insert plate spring (4) and supporting ring (5) in spline hub (1).

Fig 62: Installing Plate Spring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Install spline hub (1) with plate spring and supporting ring.

NOTE: Align spline hub (1) so that oil pump is positioned as shown in picture.

Fig 63: Aligning Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Fit spacer ring (2).

Fig 64: Fitting Spacer Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Insert all bolts and initially tighten without play.

Then slacken bolts again until spline hub (1) can be moved with fingers.

Cylinder bank 1 to 4 (inlet side):

Press tensioning rail against chain and keep tensioned. Check position of inlet chain wheel (3) to threads.

In event of large deviation (thread not visible):

Detach inlet chain wheel (3) from centering sleeve, realign chain wheel (3) and refit.

In event of small deviation:

Position special tool 11 7 150 at toothed sleeve on exhaust side.

Align secondary chain drive to bores of inlet chain wheel (3).

Fig 65: Aligning Secondary Chain Drive

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Version up to 9/2001

CAUTION: Risk of mixing up parts.

NOTE: Plate spring (2) and supporting ring (3) form a set and may only be fitted together.

Thickness of plate spring (2) = 0.85 mm.

Thickness of supporting ring (3) = 3.55 mm.

Fig 66: Identifying Plate Spring And Supporting Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Version from 9/2001

CAUTION: Risk of mixing up parts.

NOTE: Plate spring (4) and supporting ring (5) form a set and may only be fitted together.

Thickness of plate spring (4) = 1.25 mm.

Thickness of supporting ring (5) = 3.20 mm.

Plate spring (4) and supporting ring (5) may also be fitted in engine before 9/2001.

Fig 67: Identifying Plate Spring And Supporting Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Version up to 9/2001

CAUTION: Observe installation direction of plate spring (2).

NOTE: The small support diameter of the plate spring (2) points in the direction of the supporting ring (3). Supporting ring is supported with retaining lugs in spline hub (1).

Insert plate spring (2) and supporting ring (3) in spline hub (1).

Fig 68: Installing Plate Spring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Version from 9/2001

CAUTION: Observe installation direction of plate spring (4).

The small support diameter of the plate spring (4) points in the direction of the spline hub (1). Supporting ring is supported with retaining lugs in spline hub (1).

Insert plate spring (4) and supporting ring (5) in spline hub (1).

Fig 69: Installing Plate Spring

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Install spline hub (1) with plate spring and supporting ring.

NOTE: Align spline hub (1) so that oil pump is positioned as shown in picture.

Fig 70: Aligning Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Fit spacer ring (2).

Fig 71: Fitting Spacer Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Insert all bolts and initially tighten without play.

Then slacken bolts again until spline hub (1) can be moved with fingers.

Install right timing case cover. Refer to 11 14 085 Removing and installing timing case cover, top right (S62) .

NOTE: If the chain tensioning piston is reused, you must drain the oil chamber in the chain tensioner.

Install chain tensioning piston. Refer to 11 31 090 Removing and installing/replacing piston for chain tensioner (S62) .

Install left timing case cover. Refer to 11 14 080 Removing and installing timing case cover, top left (S62) .

CAUTION: Risk of mixing up parts.

The VANOS adjustment units of cylinder banks 1 to 4 and 5 to 8 are different.

Cylinder bank 1 to 4
Cylinder bank 5 to 8

Fig 72: Identifying VANOS Adjustment Units

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Install VANOS adjustment unit so that solenoid valve cables are at bottom.

Cylinder bank 1 to 4:

Oil is sprayed when splined shafts are pressed back. Cover bore (1) with a cloth.

Connect special tool 12 6 050 in conjunction with special tool 12 6 411 to solenoid valves of VANOS adjustment unit.

Connect special tool 12 6 411 to correct terminals on car battery.

Press buttons 1 and 3 on special tool 12 6 050 simultaneously.

Solenoid valves are actuated.

Press splined shafts by hand up to stop into initial position.

Fig 73: Actuating Solenoid Valves

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Replace O-rings (1 and 2) on VANOS adjustment unit.

Coat O-rings (1) with oil as antiseize agent.

CAUTION: O-rings (2) fall out very easily, secure with grease if necessary.

Fig 74: Replacing O-Rings

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Turn spline hubs (1) of inlet and exhaust camshafts to right limit position.

Fig 75: Turning Spline Hubs Of Camshafts

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Attach VANOS adjustment unit.

Fig 76: Attaching VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

CAUTION: Make sure both VANOS splined shafts remain in initial position during installation.

Rotate splined shafts of inlet and exhaust sides until spur toothing is engaged.

Push VANOS adjustment unit with splined shaft into VANOS gear until helical cut splines (2) are positioned shortly before meshing with spline hub (1).

Fig 77: Rotating Splined Shafts

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (exhaust side):

If the helical cut splines cannot be pushed into the spline hub (1):

Place special tool 11 7 150 on bore in spline hub (1). Rotate spline hub (1) against direction of rotation until splined shaft (2) is positioned with spline hub (1) exactly "tooth-to-tooth gap".

CAUTION: The "first" matching tooth must engage.

Fig 78: Rotating Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Place special tool 11 7 150 on bore in spline hub (1). Rotate spline hub (1) against direction of rotation until splined shaft (2) is positioned with spline hub (1) exactly "tooth-to-tooth gap".

CAUTION: The "first" matching tooth must engage.

Fig 79: Rotating Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4 (inlet side):

Align radial piston pump to driver on spline hub.

NOTE: Picture shows a schematic representation.

Fig 80: Aligning Radial Piston Pump To Driver

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Push on VANOS adjustment unit only until O-rings of VANOS adjustment unit rest against timing case cover.

Fig 81: Pushing On VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: If this position is not reached, realign position of radial piston pump to driver.

Insert one bolt each on left and right and initially tighten without play. The bolts serve to locate the VANOS adjustment unit in position. Do "not" tighten down screws yet. VANOS adjustment unit must "not" rest against timing case cover.

Cylinder bank 1 to 4:

NOTE: To tighten down screws on VANOS gear: Use special tool 11 7 200.

Tighten down six accessible screws (three on exhaust side and three on inlet side) on VANOS gear to 10 Nm.

Then slacken all six screws again by a 1/4 turn.

Fig 82: Tightening Accessible Screws On Vanos Gear

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 1 to 4:

Install all bolts. Alternately tighten down bolts in 1/2 turn increments carefully and evenly until VANOS adjustment unit rests against timing case cover.

Tighten down all bolts.

Fig 83: Installing Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Oil is sprayed when splined shafts are pressed back. Cover bore (1) with a cloth.

Connect special tool 12 6 050 in conjunction with special tool 12 6 411 to solenoid valves of VANOS adjustment unit. Connect special tool 12 6 411 to correct terminals on car battery.

Press buttons 2 and 4 on special tool 12 6 050. Solenoid valves are actuated.

Press splined shafts by hand up to stop into initial position.

Fig 84: Actuating Solenoid Valves

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Replace O-rings (1 and 2) on VANOS adjustment unit.

Coat O-rings (1) with oil as antiseize agent.

CAUTION: O-rings (2) fall out very easily, secure with grease if necessary.

Fig 85: Identifying O-Rings

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Turn spline hubs (1) of inlet and exhaust camshafts to right limit position.

Fig 86: Turning Spline Hubs Of Camshafts

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

Attach VANOS adjustment unit.

Fig 87: Attaching VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8:

CAUTION: Make sure both VANOS splined shafts remain in initial position during installation.

Rotate splined shafts of inlet and exhaust sides until spur toothing is engaged.

Push VANOS adjustment unit with splined shaft into VANOS gear until helical cut splines (2) are positioned shortly before meshing with spline hub (1).

Fig 88: Identifying Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (exhaust side):

If the helical cut splines cannot be pushed into the spline hub (1):

Place special tool 11 7 150 on bore in spline hub (1). Rotate spline hub (1) against direction of rotation until splined shaft (2) is positioned with spline hub (1) exactly "tooth-to-tooth gap".

Fig 89: Rotating Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: The "first" matching tooth must engage.

Cylinder bank 5 to 8 (inlet side):

Place special tool 11 7 150 on bore in spline hub (1). Rotate spline hub (1) against direction of rotation until splined shaft (2) is positioned with spline hub (1) exactly "tooth-to-tooth gap".

CAUTION: The "first" matching tooth must engage.

Fig 90: Rotating Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Cylinder bank 5 to 8 (inlet side):

Align radial piston pump to driver on spline hub.

NOTE: Picture shows a schematic representation.

Fig 91: Aligning Radial Piston Pump

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Cylinder bank 5 to 8:

Push on VANOS adjustment unit only until O-rings of VANOS adjustment unit rest against timing case cover.

CAUTION: If this position is not reached, realign position of radial piston pump to driver.

Fig 92: Locating Left & Right Bolts

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Cylinder bank 5 to 8:

NOTE: To tighten down screws on VANOS gear: Use special tool 11 7 200.

Tighten down six accessible screws (three on exhaust side and three on inlet side) on VANOS gear to 10 Nm.

Then slacken all six screws again by a 1/4 turn.

Fig 93: Tightening Screws

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Cylinder bank 5 to 8:

Install all bolts. Alternately tighten down bolts in 1/2 turn increments carefully and evenly until VANOS adjustment unit rests against timing case cover.

Tighten down all bolts.

Fig 94: Locating Bolts

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Remove special tool 11 2 300.

Fig 95: Removing Special Tool

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CAUTION: The camshafts remain locked in position with special tool 11 7 120.
Carefully rotate engine at central screw against direction of rotation until there is noticeable resistance and spline hubs are at the stop.

NOTE: This procedure creates compensation for play. Only with this compensation for play is the timing diagram correctly set.

Then crank engine again in direction of rotation until 1st cylinder is at TDC firing position.

Secure vibration damper in position with special tool 11 2 300.

Fig 96: Securing Vibration Damper

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Cylinder bank 5 to 8:

NOTE: To tighten down screws on VANOS gear: Use special tool 11 7 200.

Tighten down six accessible screws (three on exhaust side and three on inlet side) on VANOS gear to 10 Nm.

Fig 97: Tightening Screws

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Cylinder bank 1 to 4:

NOTE: To tighten down screws on VANOS gear: Use special tool 11 7 200.

Tighten down six accessible screws (three on exhaust side and three on inlet side) on VANOS gear to 10 Nm.

Fig 98: Tightening Screws

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Cylinder bank 1 to 4:

Remove special tool 11 7 120.

Fig 99: Removing Special Tool

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Cylinder bank 5 to 8:

Remove special tool 11 7 120.

Fig 100: Removing Special Tool

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Remove special tool 11 2 300. Crank engine at central bolt in direction of rotation a further revolution up to overlap TDC position.

Cylinder bank 5 to 8:

NOTE: To tighten down screws on VANOS gear: Use special tool 11 7 200.

Tighten down remaining six bolts on VANOS gear to 10 Nm.

Fig 101: Identifying Bolts On VANOS Gear

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Cylinder bank 1 to 4:

NOTE: To tighten down screws on VANOS gear: Use special tool 11 7 200.

Tighten down remaining six bolts on VANOS gear to 10 Nm.

Fig 102: Identifying Bolts On VANOS Gear

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Rotate crankshaft in direction of rotation as far as ignition TDC position of cylinder 1. Secure vibration damper in position with special tool 11 2 300.

Fig 103: Securing Vibration Damper

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Cylinder bank 5 to 8:

NOTE: Signal rings of inlet and exhaust camshafts are different.

Signal ring of inlet camshaft with one dowel pin
Signal ring of exhaust camshaft with two dowel pins

Fig 104: Identifying Signal Rings

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Fit signal rings, align bores (1 and 2).

Cylinder bank 5 to 8:

Install banjo bolt (1).

Fig 105: Installing Banjo Bolt

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Grip camshaft at hexagon head and tighten down banjo bolt (1).

Tightening torque, 50 Nm.

Cylinder bank 1 to 4:

NOTE: Signal rings of inlet and exhaust camshafts are different.

Signal ring of inlet camshaft with one dowel pin
Signal ring of exhaust camshaft with two dowel pins

Fig 106: Identifying Signal Rings
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Fit signal rings, align bores (1 and 2).

Cylinder bank 1 to 4:

Install banjo bolt (1).

Fig 107: Installing Banjo Bolt

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Grip camshaft at hexagon head and tighten down banjo bolt (1).

Tightening torque, 50 Nm.

Pull special tool 11 2 300 back until vibration damper is no longer secured in position.

Crank engine "twice" in direction of rotation until 1st cylinder is at TDC firing position.

Secure vibration damper in position with special tool 11 2 300.

Fig 108: Securing Vibration Damper

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Cylinder bank 1 to 4:

Check camshaft adjustment.

NOTE: Groove on 1st bearing cap is a little wider than groove in camshaft.

Groove of inlet and exhaust camshafts must be inside groove on 1st bearing cap.

Fig 109: Checking Camshaft Adjustment

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Cylinder bank 5 to 8:

Check camshaft adjustment.

NOTE: Groove on 1st bearing cap is a little wider than groove in camshaft.

Groove of inlet and exhaust camshafts must be inside groove on 1st bearing cap.

Fig 110: Checking Camshaft Adjustment

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If necessary, adjust camshaft timing. Refer to 11 31 505 Adjusting camshaft timing (S62) .

Remove special tool 11 2 300.

Fig 111: Removing Special Tool

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Cylinder bank 5 to 8:

Replace sealing rings.

Fit oil line to VANOS adjustment unit.

Tightening torque, 13 Nm.

Fig 112: Fitting Oil Line

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Cylinder bank 1 to 4:

Replace sealing rings.

Attach oil line to VANOS adjustment unit.

Fig 113: Attaching Oil Line

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Tightening torque, 13 Nm.

Assemble engine.

CAUTION: There is air in the VANOS system once it is opened.
In the first few seconds after startup this results in a clearly discernible "rattling noise".
This rattling noise does "not" indicate incorrect assembly.
The rattling noise will disappear as soon as the oil pressure has built up and the system has vented.