11 31 019 Replacing Camshafts (S54)

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Special Tools Required:

11 2 300
11 4 380
11 5 100
11 7 130
11 7 160
11 7 200
11 7 342
11 9 130
11 9 140
11 9 170
12 6 050
12 6 410
12 6 411

Read fault memory and make a documentary record.

Remove cylinder head. Refer to 11 12 100 REMOVING AND INSTALLING/SEALING CYLINDER HEAD (S54) .

Remove all spark plugs.

Remove fan clutch with fan impeller and fan cowl. Refer to 11 52 020 REMOVING AND INSTALLING/REPLACING FAN CLUTCH (S52 / S54 / M52 / M52TU / M54 / M56) and 17 11 031 REPLACING FAN COWL (S54) .

Removal:

Removal of the VANOS adjustment unit and the camshafts is described separately from installation. The assembly sequence for removal and installation is different.

Fit special tool 11 5 100 to four screws on crankshaft hub.

Fig 1: View Of Adapter With Socket On Crankshaft Hub

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Rotate crankshaft in direction of rotation as far as firing TDC position of 1st cylinder.

Fig 2: Rotating Crankshaft As Far As Firing TDC Position Of 1st Cylinder

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Secure vibration damper with special tool 11 2 300 in firing TDC position of 1st cylinder.

Fig 3: Securing Vibration Damper With Special Tool

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CAUTION: When the engine is switched off, VANOS moves the camshafts to a position which is advantageous to engine starting. The camshafts and the VANOS adjustment unit must be placed in the installation position before the VANOS adjustment unit is removed.

Detach bracket of oil line from timing case cover.

Fig 4: View Of Oil Line Bracket

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Remove oil line from VANOS adjustment unit.

Fig 5: Identifying Oil Line From VANOS Adjustment Unit

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Fit special tool 11 7 130 to VANOS adjustment unit. Connect compressed air (2 to 8 bar).

Fig 6: View Of Connection Piece In VANOS Adjustment Unit

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Disconnect plug connection on solenoid valve.

Fig 7: Disconnecting Plug Connection On Solenoid Valve

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Connect special tool 12 6 050 in conjunction with special tool 12 6 411 (from special tool kit 12 6 410) to solenoid valves. 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 8: View Of Switching Unit

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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.

Fig 9: Identifying Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 10: Locating Toggle Switch Buttons 3 And 4 On Switching Unit

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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 11: View Of Exhaust Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

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

Disconnect compressed air from special tool 11 7 130.

Remove special tool 11 7 130.

Fig 12: Disconnecting Compressed Air From Connection Piece

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Release screws (1).
Remove sliding rail (2).
Release screws (3).
Remove holder (4).

Fig 13: Removing Sliding Rail
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Remove special tool 11 2 300. Rotate crankshaft in direction of rotation a further revolution up to overlap TDC position.

Fig 14: Removing Special Tool From Vibration Damper

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NOTE: TDC allocation above marking on vibration damper is sufficient.

Slacken six accessible bolts two turns.

Fig 15: 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 16: Securing Vibration Damper In Position With Special Tool

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Slacken remaining six bolts two turns.

Fig 17: View Of Accessible Bolts

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Release screws on VANOS adjustment unit.

Fig 18: Releasing Screws On VANOS Adjustment Unit

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CAUTION: Do not damage VANOS adjustment unit.

Carefully detach VANOS adjustment unit.

Fig 19: Detaching VANOS Adjustment Unit

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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 slackened screws on inlet side.

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

Fig 20: Locating Spline Hub Retaining Screws On Inlet Side

Courtesy of BMW OF NORTH AMERICA, INC.

Exhaust 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 slackened screws on exhaust side.

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

Fig 21: Locating Spline Hub Retaining Screws On Exhaust Side

Courtesy of BMW OF NORTH AMERICA, INC.

Remove chain tensioning piston. Refer to 11 31 090 REMOVING AND INSTALLING/REPLACING CHAIN TENSIONING PISTON (S54) .

Detach sprocket wheel (1 and 2) from centering sleeve.

Hold timing chain under tension.

Feed out sprocket wheel (1 and 2). Secure timing chain against slipping down.

Fig 22: Detaching Sprocket Wheel From Centering Sleeve

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Remove special tool 11 2 300.

Fig 23: Removing Plug Mandrel From Vibration Damper

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

Lift timing chain and hold under tension.

Crank engine at central bolt against direction of rotation to 30° before TDC position.

Fig 24: Identifying 30° Before TDC Position.

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: This work step is only necessary if the camshafts are to be replaced at a later stage.

Grip camshafts at hexagon head.

Release bolts on centering sleeves (1).

Remove centering sleeves (1) on exhaust and inlet sides with thrust washers (2)

Fig 25: Locating Centering Sleeves Retaining Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: This work step is only necessary if the camshafts are to be replaced at a later stage.

Withdraw toothed sleeves (3) from exhaust and inlet camshafts.

Fig 26: View Of Toothed Sleeves For Exhaust And Inlet Camshafts

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Remove profile seal (1)

Fig 27: Locating Profile Seal

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NOTE: Inlet and exhaust camshafts have a joint thrust bearing flange at 1st bearing seat. Thrust bearing flange is secured with adapter sleeves.

Release nuts and remove thrust bearing flange (1).

Fig 28: Identifying Thrust Bearing Flange Retaining Nuts

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Removing inlet camshaft:

CAUTION: Note direction and angle of rotation.

Rotate inlet camshaft at hexagon inwards until cam tips on 1st cylinder are horizontal.

Fig 29: Identifying Inlet Cam Tips Aligned Horizontally

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Inlet side:

CAUTION: Incorrect removal/installation without a special tool exposes the camshaft to the risk of preliminary damage or breakage.

Fit special tool 11 4 380 on inlet camshaft and screw into spark plug threads of cylinders 2 and 5.

Pretension inlet camshaft by rotating eccentric shaft. Release all nuts of bearing caps on inlet camshaft.

Fig 30: View Of Press-Down Device On Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Inlet side:

NOTE: Bearing caps are secured with adapter sleeves. Bearing caps are marked E2 to E7.

Feed out bearing caps E2 to E7 and set down in order.

Fig 31: Locating Bearing Caps

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Inlet side:

CAUTION: Inlet camshaft must not tilt when tension is relieved on special tool 11 4 380.

Relieve tension on special tool 11 4 380 and remove. Lift out inlet camshaft.

Fig 32: Removing Inlet Camshaft

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Removing exhaust camshaft:

CAUTION: Note direction and angle of rotation.

Rotate exhaust camshaft at hexagon inwards until cam tips on 1st cylinder are horizontal.

Fig 33: Identifying Exhaust Camshaft Tips Aligned Horizontally

Courtesy of BMW OF NORTH AMERICA, INC.

Exhaust side:

CAUTION: Incorrect removal/installation without a special tool exposes the camshaft to the risk of preliminary damage or breakage.

Fit special tool 11 4 380 on exhaust camshaft and screw into spark plug threads of cylinders 2 and 5.

Pretension exhaust camshaft by rotating eccentric shaft. Release all nuts of bearing caps on exhaust camshaft.

Fig 34: Installing Press-Down Device On Exhaust Camshaft

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Exhaust side:

NOTE: Bearing caps are secured with adapter sleeves. Bearing caps are marked A2 to A7.

Feed out bearing caps A2 to A7 and set down in order.

Fig 35: Locating Bearing Caps

Courtesy of BMW OF NORTH AMERICA, INC.

Exhaust side:

CAUTION: Exhaust camshaft must not tilt when tension is relieved on special tool 11 4 380.

Relieve tension on special tool 11 4 380 and remove. Lift out exhaust camshaft.

Fig 36: Removing Exhaust Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, removing signal disk of exhaust and inlet camshafts:

CAUTION: Do not damage camshafts. Use protective vise jaws.

Grip camshaft at hexagon in a vise and release banjo bolt (1).

Fig 37: Releasing Banjo Bolt

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Installation:

Installation of camshafts and the VANOS adjustment unit is described separately from removal. The assembly sequence for removal and installation is different.

CAUTION: Danger of mixing up

The inlet camshaft has an identifying groove behind the locating bore.

(A) Exhaust camshaft without groove.
(E) Inlet camshaft with groove.

Fig 38: Identifying Exhaust Camshaft And Inlet Camshaft
Courtesy of BMW OF NORTH AMERICA, INC.

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

(A) Signal disk of exhaust camshaft with seven blades.

(E) Signal disk of inlet camshaft with six blades. Fit signal disks, align locating lug to groove.

Fig 39: Identifying Signal Rings Of Inlet And Exhaust Camshafts

Courtesy of BMW OF NORTH AMERICA, INC.

Install banjo bolt (1) and tighten down.

Tightening torque, refer to 11 31 13AZ in ENGINE - TIGHTENING TORQUES .

Fig 40: Installing Banjo Bolt And Tightening Down

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Clean dirty parts. Oil following parts before installation:

Contact faces of camshafts in cylinder head.
Rocker arm.
Cams and contact faces of camshafts.
Bearing cover.

Installing inlet camshaft:

Install inlet camshaft in such a way that cams on cylinder 1 point horizontally inwards.

Fig 41: Installing Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Inlet side:

CAUTION: Incorrect removal/installation without a special tool exposes the camshaft to the risk of preliminary damage or breakage.

Fit special tool 11 4 380 on inlet camshaft and screw into spark plug threads of cylinders 2 and 5.

Fig 42: Installing Press-Down Device On Inlet Camshaft

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Inlet side:

Pretension inlet camshaft by rotating eccentric shaft.

Fig 43: Pretensioning Inlet Camshaft By Rotating Eccentric Shaft

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Inlet side:

CAUTION: Risk of mixing up parts. Fit inlet side bearing caps so that lug (2) points outwards to inlet side.

NOTE: Bearing caps are secured with adapter sleeves (1).

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

Fig 44: Locating Dowel Sleeves

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Inlet side:

NOTE: Bearing caps are marked E2 to E7.

Install bearing caps E2 to E7.

Fig 45: Installing Bearing Caps

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Inlet side:

Align bearing caps by hand until they are secured by means of adapter sleeves.

Insert all nuts of bearing caps on inlet camshaft.

Manually tighten bearing cap nuts and then tighten down from inside to outside in 1/2 turn increments.

Tightening torque, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES .

Remove special tool 11 4 380.

Fig 46: Removing Press-Down Device

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Inlet side:

CAUTION: Note direction and angle of rotation.

Rotate inlet camshaft at hexagon from horizontal position upwards until locating bore (1) in camshaft is vertical.

Fig 47: Aligning Locating Bore In Inlet Camshaft

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CAUTION: Pay attention to installation direction of special tool 11 9 130.

(A) Exhaust side.
(E) Inlet side.

Fig 48: Identifying Setting Gauge (Special Tool 11 9 130)

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Inlet side:

Attach special tool 11 9 130 to cylinder head.

Align inlet camshaft at hexagon until special tool 11 7 342 can be joined by means of special tool 11 9 130 in locating bore.

Special tool 11 9 130 must rest flat on cylinder head. Remove special tool 11 9 130 and special tool 11 7 342.

Fig 49: Attaching Setting Gauge To Cylinder Head

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Installing exhaust camshaft:

Clean dirty parts.

Oil following parts before installation:

Contact faces of camshafts in cylinder head.
Rocker arm.
Cams and contact faces of camshafts.
Bearing cover.

Install exhaust camshaft in such a way that cams on cylinder 1 point horizontally inwards.

Fig 50: Aligning Exhaust Camshaft Cams On Cylinder 1

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Exhaust side:

CAUTION: Incorrect removal/installation without a special tool exposes the camshaft to the risk of preliminary damage or breakage.

Fit special tool 11 4 380 on exhaust camshaft and screw into spark plug threads of cylinders 2 and 5.

Fig 51: Installing Special Tool On Exhaust Camshaft

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Exhaust side:

Pretension exhaust camshaft by rotating eccentric shaft.

Fig 52: Pretensioning Exhaust Camshaft By Rotating Eccentric Shaft

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Exhaust side:

CAUTION: Risk of mixing up parts. Fit exhaust side bearing caps so that lug (2) points outwards to exhaust side.

NOTE: Bearing caps are secured with adapter sleeves (1).

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

Fig 53: Checking Dowel Sleeves

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Exhaust side:

NOTE: Bearing caps are marked A2 to A7.

Install bearing caps A2 to A7.

Fig 54: Installing Bearing Caps

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Exhaust side:

Align bearing caps by hand until they are secured by means of adapter sleeves.

Insert all nuts of bearing caps on exhaust camshaft.

Manually tighten bearing cap nuts and then tighten down from inside to outside in 1/2 turn increments.

Tightening torque, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES .

Remove special tool 11 4 380.

Fig 55: Removing Special Tool

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Exhaust side:

CAUTION: Note direction and angle of rotation.

Rotate exhaust camshaft at hexagon from horizontal position upwards until locating bore (1) in camshaft is vertical.

Fig 56: Aligning Locating Bore In Exhaust Camshaft

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CAUTION: Pay attention to installation direction of special tool 11 9 130.

(A) Exhaust side.
(E) Inlet side.

Fig 57: Identifying Setting Gauge

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Exhaust side:

Attach special tool 11 9 130 to cylinder head.

Align exhaust camshaft at hexagon until special tool 11 7 342 can be joined by means of special tool 11 9 130 in locating bore.

Special tool 11 9 130 must rest flat on cylinder head.

Remove special tool 11 9 130 and special tool 11 7 342.

Fig 58: Attaching Special Tool To Cylinder Head

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NOTE: Inlet and exhaust camshafts have a joint thrust bearing flange (1) at 1st bearing seat.

Check adapter sleeves (2) for damage and correct installation position.

Observing installation direction:

Fit thrust bearing flange (1) as shown in illustration.

Fig 59: Identifying Thrust Bearing Flange

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Align thrust bearing flange (1) by hand until it is secured to cylinder head by means of adapter sleeves.

Install nuts of thrust bearing flange (1).

Manually tighten nuts and then tighten down from in 1/2 turn increments.

Fig 60: Locating Nuts Of Thrust Bearing Flange

Courtesy of BMW OF NORTH AMERICA, INC.

Coat toothing of toothed sleeves (3) with engine oil as antiseize agent.

Install toothed sleeves (3) of exhaust and inlet camshafts. Align bores in toothed sleeves (3) to tapped holes in camshafts.

Fig 61: View Of Toothed Sleeves Of Exhaust And Inlet Camshafts

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CAUTION: Note installation direction of thrust washers (2). Large chamfer points to camshaft.

Fig 62: Identifying Installation Direction Of Thrust Washers

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Note installation direction of thrust washers (2).

Fit thrust washers (2) on centering sleeves (1) in such a way that large chamfer points towards rear to camshaft.

Fig 63: Aligning Thrust Washers On Centering Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

Fit centering sleeve (1) on exhaust and inlet sides with thrust washer (2).

Grip camshafts at hexagon head.

Tighten down bolts on centering sleeves (1).

Fig 64: Locating Centering Sleeve Retaining Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Inlet side:

CAUTION: Pay attention to installation direction of special tool 11 9 130.

Attach special tool 11 9 130 to cylinder head. Align inlet camshaft at hexagon until special tool 11 7 342 can be joined by means of special tool 11 9 130 in locating bore.

Special tool 11 9 130 must rest flat on cylinder head. Remove special tool 11 7 342.

Fig 65: Attaching Setting Gauge To Cylinder Head

Courtesy of BMW OF NORTH AMERICA, INC.

Exhaust side:

Align exhaust camshaft at hexagon until special tool 11 7 342 can be joined by means of special tool 11 9 130 in locating bore.

Special tool 11 9 130 must rest flat on cylinder head.

Remove special tool 11 9 130 and special tool 11 7 342.

Fig 66: Aligning Exhaust Camshaft At Hexagon

Courtesy of BMW OF NORTH AMERICA, INC.

Lift timing chain and hold under tension.

Rotate crankshaft from 30° before TDC position in direction of rotation as far as firing TDC position. Secure vibration damper in position with special tool 11 2 300.

Fig 67: Securing Vibration Damper

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Hold timing chain under tension.

Position tapped holes of thrust washer horizontally as shown in illustration.

Install sprocket wheel (2) on inlet side on centering sleeves in such a way that elongated holes are centrally located.

NOTE: The position of the elongated holes is only important in terms of accessibility to the screws and does not affect operation in any way.

Fig 68: Aligning Tapped Holes Of Thrust Washer

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Hold timing chain under tension and feed on sprocket wheel (1).

Install sprocket wheel (1) on exhaust side on centering sleeves in such a way that elongated holes of sprocket wheels (1 and 2) are centrally located.

Press tensioning rail against timing chain and check position of elongated holes.

NOTE: The position of the elongated holes is only important in terms of accessibility to the screws and does not affect operation in any way.

Fig 69: View Of Sprocket Wheels On Exhaust Side

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Install chain tensioning piston. Refer to 11 31 090 REMOVING AND INSTALLING/REPLACING CHAIN TENSIONING PISTON (S54) .

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

Exhaust side:

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 70: Inserting Plate Spring And Supporting Ring In Spline Hub

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Exhaust side:

Take care: the supporting ring can easily fall out.

Remove spline hub with plate spring and supporting ring.

Bore hole (1) must point upwards as shown in illustration.

Fig 71: Aligning Bore Hole On Exhaust Side

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Exhaust side:

Insert all screws of spline hub (1) and tighten by hand until free of play.

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

Fig 72: Identifying Screws Of Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Inlet side:

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 73: Inserting Plate Spring And Supporting Ring In Spline Hub

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Inlet side:

Take care: the supporting ring can easily fall out.

Remove spline hub with plate spring and supporting ring.

Bore hole (1) must point upwards as shown in illustration.

Fig 74: Aligning Bore Hole On Inlet Side

Courtesy of BMW OF NORTH AMERICA, INC.

Inlet side:

Insert all screws of spline hub (1) and tighten by hand until free of play.

Then slacken screws again until spline hub (1) can be move with fingers.

Fig 75: Identifying Screws Of Spline Hub

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Detach control valve (1) from VANOS adjustment unit.

Fig 76: View Of Control Valve On VANOS Adjustment Unit

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NOTE: A filter is integrated in the control valve.

The control valve must be replaced after any engine damage which suggests that the filter is fouled with filings/shavings.

Replace sealing rings (1) and coat with oil as antiseize agent. Preassemble control valve in cylinder head.

Fig 77: Replacing Sealing Rings

Courtesy of BMW OF NORTH AMERICA, INC.

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 (from special tool kit 12 6 410) 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 78: View Of Switching Unit

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

Fig 79: Locating Dowel Sleeves

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Replace gasket (1).

CAUTION: Note direction of installation of gasket. Install gasket (1) in such a way that beading points to VANOS adjustment unit. Secure gasket (1) with sealing compound on adapter sleeves.

Fig 80: Aligning Gasket For VANOS Adjustment Unit

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Secure special tool 11 9 170 as shown in illustration by means of stud bolt.

NOTE: The special tool 11 9 170 serves to maintain a prespecified distance during the below-mentioned installation of the VANOS adjustment unit.

Fig 81: Securing Spacer For Installation Of VANOS Adjustment Unit

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

Fig 82: Aligning Spline Hubs To Right Limit Position

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NOTE: Special tool 11 9 170 remains as a spacer element between cylinder head and VANOS adjustment unit.

Attach VANOS adjustment unit.

Fig 83: Attaching VANOS Adjustment Unit

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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 84: Pushing VANOS Adjustment Unit Into VANOS Gear

Courtesy of BMW OF NORTH AMERICA, INC.

Exhaust side:

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

Place special tool 11 7 160 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 85: Placing Special Tool On Bore In Spline Hub (Exhaust)

Courtesy of BMW OF NORTH AMERICA, INC.

Inlet side:

Place special tool 11 7 160 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 86: Placing Special Tool On Bore In Spline Hub (Inlet)

Courtesy of BMW OF NORTH AMERICA, INC.

Exhaust side:

Align radial piston pump to driver on spline hub.

NOTE: Picture shows a schematic representation.

Fig 87: Aligning Radial Piston Pump To Driver On Spline Hub (Exhaust)

Courtesy of BMW OF NORTH AMERICA, INC.

Push on VANOS adjustment unit until it contacts special tool 11 9 170.

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

Fig 88: Installing VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Do not tighten down screws.

NOTE: Screw on left and right serves to secure the VANOS adjustment unit.

Insert a screw on left and right and tighten by hand until free of play.

Fig 89: Securing VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The procedure described below helps to provide compensation for play. Only with this compensation for play is the timing diagram correctly set.

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

Tighten down the two opposing screws on the inlet and exhaust sides of the VANOS gear to 10 N.m.

Then slacken all four screws by a 1/4 turn.

Fig 90: Locating Screws On VANOS Gear

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Remove special tool 11 9 170 on left and right sides.

Fig 91: Identifying Special Tool On Left And Right Sides

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CAUTION: Make sure that radial piston pump is aligned to driver on spline hub. When the left and right screws are tightened down alternately, the exhaust and inlet camshafts must not rotate. If the camshafts do rotate, this means that the screws on the VANOS gear were not previously released correctly.

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

Fig 92: Aligning Radial Piston Pump To Driver On Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Insert remaining screws and tighten down.

Fig 93: Identifying Retaining Screws On VANOS Adjustment Unit

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NOTE: Use special tool 11 7 200 to tighten down bolts on VANOS gear.

Fig 94: Installing Bolts On VANOS Gear

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

Fig 95: Locating Six Accessible Screws On VANOS Gear

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

NOTE: TDC allocation above marking on vibration damper is sufficient.

Fig 96: Rotating Crankshaft To Overlap TDC Position

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NOTE: Use special tool 11 7 200 to tighten down bolts on VANOS gear.

Fig 97: Installing Bolts On VANOS Gear

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Tighten down remaining six screws (three on exhaust side and there on inlet side) on VANOS gear 10 N.m.

Fig 98: Installing Remaining Screws On VANOS Gear

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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 99: Securing Vibration Damper

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Check camshaft setting:

Attach special tool 11 9 140 and join in inlet camshaft.

NOTE: The inlet camshaft is correctly adjusted when special tool 11 9 140 rests flat on the cylinder head or protrudes by max. 0.5 mm to the exhaust side.

If the special tool 11 9 140 protrudes to the inlet side, the timing must be readjusted.

Fig 100: Attaching Gauge To Inlet Camshaft

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Join special tool 11 9 140 in exhaust camshaft.

NOTE: The exhaust camshaft is correctly adjusted when special tool 11 9 140 rests flat on the cylinder head or protrudes by max. 0.5 mm to the exhaust side.

If the special tool 11 9 140 protrudes to the inlet side, the timing must be readjusted.

If necessary, adjust camshaft timing. Refer to 11 31 505 ADJUSTING CAMSHAFT TIMING (S54) .

Fig 101: Attaching Gauge To Exhaust Camshaft

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NOTE: Check installed direction.

Install holder (4)

Fig 102: Installing Holder

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Insert screws (3) and secure holder (4) (do not tighten down screws (3) yet)
Install sliding rail (2).
Insert screws (1).
Tighten down screws (1) and screws (3).

Fig 103: View Of Sliding Rail
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Replace sealing rings of banjo bolt.

Insert banjo bolt but do not tighten down yet.

Fig 104: Locating Banjo Bolt

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Install bracket of oil line. Install screw and tighten down.

Fig 105: Identifying Bracket Of Oil Line

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Tighten down banjo bolt of oil line.

Tightening torque, refer to 11 36 9AZ in ENGINE - TIGHTENING TORQUES .

Fig 106: Tightening Down Banjo Bolt Of Oil Line

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Remove special tool 11 2 300.

Adjust valves. Refer to 11 34 004 ADJUSTING VALVE CLEARANCE (S54) .

Assemble engine.

Fig 107: Removing Plug Mandrel From Vibration Damper

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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.