11 36 070 Removing and installing/replacing toothed shafts of VANOS gear on left (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:

11 2 300
11 7 120
11 7 130
11 7 150
11 7 200
12 6 050
12 6 410
12 6 411

(cylinder bank 5 to 8)

Read fault memory and make a documentary record.

Open drain plug on radiator. Unfasten drain plug for coolant on right engine block. Drain and dispose of coolant.

Installation:

Replace drain plug sealing ring on engine block.

Tightening torque, 25 Nm.

Top up coolant. Vent cooling system and check for leaks. Refer to 17 00 005 DRAINING AND ADDING COOLANT (S62) .

Remove intake filter housing upper section with air-mass flow sensor.

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

Remove left cylinder head cover. This operation is described in the work step Removing both cylinder head covers. Refer to 11 12 004 REMOVING AND INSTALLING/SEALING BOTH CYLINDER HEAD COVERS (S62) .

Remove all spark plugs.

Remove water hose between radiator and thermostat housing.

Remove fan clutch with fan impeller and fan cowl. Refer to 11 52 020 Removing and installing or replacing fan clutch (S62) and 17 11 031 REPLACING FAN COWL (S62) .

Disconnect oil lines (1) on cylinder bank 5 to 8.

Fig 1: Disconnecting Oil Lines

Courtesy of BMW OF NORTH AMERICA, INC.

Removal:

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

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 cylinder bank 5 to 8 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 2: Securing Vibration Damper

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect oil line from VANOS adjustment unit on cylinder bank 5 to 8.

Fig 3: Disconnecting Oil Line

Courtesy of BMW OF NORTH AMERICA, INC.

Fit special tool 11 7 130 to VANOS adjustment unit.

Fig 4: Fitting Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Connect compressed air (2 to 8 bar).

Disconnect plug connection for solenoid valves on cylinder bank 5 to 8.

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.

Fig 5: Connecting Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 6: Fitting Open-End Wrench

Courtesy of BMW OF NORTH AMERICA, INC.

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

Simultaneously rotate inlet camshaft at hexagon against direction of rotation up to stop.

Fig 7: Rotating Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The splines in the VANOS gear are now in contact; the inlet camshaft cannot be rotated further.

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

Fig 8: Pressing Toggle Switch Buttons

Courtesy of BMW OF NORTH AMERICA, INC.

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

Simultaneously rotate exhaust camshaft at hexagon against direction of rotation up to stop.

Fig 9: Rotating Exhaust Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The splines in the VANOS gear are now in contact; the exhaust camshaft cannot be rotated further.

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

Slacken six accessible bolts two turns.

Fig 10: Locating Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

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 11: Securing Vibration Damper

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken remaining six bolts two turns.

Fig 12: Locating Remaining Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

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 13: Securing Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws on VANOS adjustment unit.

Fig 14: Releasing Screws On VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 15: Levering Out VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Detach VANOS adjustment unit together with toothed shafts.

Fig 16: Detaching VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 17: Connecting Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Press button 1 on special tool 12 6 050 and simultaneously pull out toothed shaft of exhaust side by hand up to stop.

Press button 3 on special tool 12 6 050 and simultaneously pull out toothed shaft of inlet side by hand up to stop.

CAUTION: CCW thread!

Brace against twin surface (1) and release hex head (2).

Release toothed shaft screw connection on inlet and exhaust sides.

Fig 18: Releasing Toothed Shaft Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

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 19: Identifying VANOS Adjustment Units

Courtesy of BMW OF NORTH AMERICA, INC.

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

CAUTION: CCW thread!

Install toothed shafts of inlet and exhaust sides.

Fig 20: Installing Toothed Shafts

Courtesy of BMW OF NORTH AMERICA, INC.

Brace against twin surface (1) and release hex head (2).

Tightening torque 10 Nm.

NOTE: Coat all sliding surfaces on toothed shafts with engine oil as lubricant.

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.

Fig 21: Connecting Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Press button 2 on special tool 12 6 050 and simultaneously press back toothed shaft of exhaust side by hand up to stop.

Press button 4 on special tool 12 6 050 and simultaneously press back toothed shaft of inlet side by hand up to stop.

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

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

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

Fig 22: Replacing O-Rings

Courtesy of BMW OF NORTH AMERICA, INC.

Rotate spline hubs (1) of inlet and exhaust camshafts to right stop.

Fig 23: Rotating Spline Hubs

Courtesy of BMW OF NORTH AMERICA, INC.

Attach VANOS adjustment unit.

Fig 24: Attaching VANOS Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Ensure that both VANOS splined shafts remain in initial position during assembly procedure.

Rotate splined shafts of inlet and exhaust sides until straight splines are 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 25: Pushing In VANOS Adjustment Unit

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 7 150 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" fitting tooth must snap into place.

Fig 26: Rotating Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Intake 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" fitting tooth must snap into place.

Fig 27: Rotating Spline Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Intake side:

Align radial piston pump to driver on spline hub.

NOTE: Picture shows a schematic representation.

Fig 28: Aligning Radial Piston Pump To Driver

Courtesy of BMW OF NORTH AMERICA, INC.

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.

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 bolts yet. VANOS adjustment unit must "not" rest against timing case cover.

Fig 29: Inserting Bolts On Left And Right

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

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

Fig 30: Tightening Down Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

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 31: Tightening Down All Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 2 300.

Fig 32: Removing Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

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 33: Securing Vibration Damper

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 34: Tightening Down Screws On VANOS Gear

Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 7 120.

Fig 35: Removing Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

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

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 36: Tightening Down Remaining Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

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 37: Securing Vibration Damper

Courtesy of BMW OF NORTH AMERICA, INC.

Check camshaft adjustment.

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

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

Fig 38: View Of Groove

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, adjust camshaft timing. Refer to 11 31 505 ADJUSTING CAMSHAFT TIMING (S62) .

Replace sealing rings.

Fit oil line to VANOS adjustment unit.

Fig 39: Fitting Oil Line To Vanos Adjustment Unit

Courtesy of BMW OF NORTH AMERICA, INC.

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.