BMW 7 Series: Removing And Installing/Renewing Inlet And Exhaust Adjustment Units On Left Side (N63)
Notes
IMPORTANT: When the engine is shut down, the inlet and exhaust camshaft adjuster is normally locked in its initial position.
The situation may arise in some individual cases where this initial position is not reached and the camshaft can continue to be rotated in the adjustment range of the camshaft adjuster.
Where central bolts are not greased at the bolt contact points up to engine number 20024295 , the camshaft adjuster must be renewed due to safety reasons.
The central bolts is greased from engine number 20024296.
(cylinder bank 5 to 8)
Necessary preliminary work
- Read fault memory and make a documentary record
- Remove LEFT CYLINDER HEAD COVER
- Remove LEFT TIMING CASE COVER
- Check timing
To release central bolts, use special tool 11 9 890 or grip at hexagon head of camshaft.
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Fig. 343: Identifying Special Tool 11 9 890
IMPORTANT: If special tool 11 9 890 can not be fitted, it is necessary when releasing the central bolt to grip the hexagon head of the respective camshafts.
Release central bolts (1 and 2) of intake and exhaust camshaft adjusters.
Installation note: Replace central bolts after releasing.
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Fig. 344: Identifying Central Bolts Of Intake And Exhaust Camshaft Adjusters
IMPORTANT: Check whether head of central bolt (1) is greased (see arrow).
If no grease can be seen on the bolt head of central bolt (1), the intake and exhaust camshaft adjuster must be renewed due to safety reasons.
Installation note: Coat contact face of central bolt (1) with copper paste.
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Fig. 345: Checking Head Of Central Bolt
Release hexagon socket screw.
Release special tool 11 9 900 at knurled screws and remove.
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Fig. 346: Preloading Hexagon Socket Screw With Special Tool 00 9 250 To 0.6
Nm
Release screws (1).
Remove upper tensioning rail (2).
NOTE: Shown without special tools for purposes of clarity.
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Fig. 347: Identifying Upper Tensioning Rail And Screws
Remove central bolt (2) of inlet adjustment unit.
Installation note: Replace central bolts after releasing.
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Fig. 348: Identifying Central Bolts Of Intake And Exhaust Camshaft Adjusters
Detach inlet adjustment unit (1) in direction of arrow from inlet camshaft.
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Fig. 349: Identifying Inlet Adjustment Unit
Feed out inlet adjustment unit (2) from timing chain (1).
Lift out inlet adjustment unit (2).
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Fig. 350: Identifying Inlet Adjustment Unit And Timing Chain
Remove central bolt (1) of exhaust adjustment unit.
Installation note: Replace central bolts after releasing.
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Fig. 351: Identifying Central Bolts Of Intake And Exhaust Camshaft Adjusters
Detach exhaust adjustment unit (1) in direction of arrow from exhaust camshaft.
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Fig. 352: Identifying Exhaust Adjustment Unit
Feed out exhaust adjustment unit (2) from timing chain (1).
Lift out exhaust adjustment unit (2).
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Fig. 353: Identifying Exhaust Adjustment Unit And Timing Chain
IMPORTANT: Danger of mix-up:
Intake and exhaust camshaft adjusters are different.
Mixing up the inlet and exhaust adjustment units will cause damage to the engine.
- Intake camshaft adjuster (1) is marked IN
- Exhaust camshaft adjuster (2) is marked OUT
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Fig. 354: Identifying Intake And Exhaust Camshaft Adjusters Mark
Installation note: Coat contact face of central bolt (1) with copper paste.
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Fig. 355: Checking Head Of Central Bolt
NOTE: Position of adjustment units in relation to timing chain can be freely selected.
Feed adjuster into timing chain and position on camshafts.
Insert central bolts (1 and 2) on adjustment units without gaps.
Release central bolts (1 and 2) by 90º.
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Fig. 356: Identifying Central Bolts Of Intake And Exhaust Camshaft Adjusters
Fit sliding rail (2) and secure with screws (1).
Tightening torque: 11 31 4AZ.
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Fig. 357: Identifying Sliding Rail And Screws
Get set of special tools 11 9 890 ready for securing camshafts.
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Fig. 358: Identifying Set Of Special Tools 11 9 890
Place special tool 11 9 893 on exhaust camshaft.
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Fig. 359: Identifying Special Tool 11 9 893 On Exhaust Camshaft
Fit special tool 11 9 893 on intake camshaft.
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Fig. 360: Identifying Special Tool 11 9 893 On Intake Camshaft
Installation note: Align exhaust and intake camshafts so that special tools 11 9 893 lie on the cylinder head without any gap.
Screw special tool 11 9 894 into cylinder head.
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Fig. 361: Positioning Special Tool 11 9 893 On Intake Camshaft And Exhaust
Camshaft
Press special tool 11 9 892 down with special tool 11 9 891.
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Fig. 362: Positioning Special Tool 11 9 892 On Special Tool 11 9 893
Screw in special tool 11 9 900.
Pretension timing chain with special tool 11 9 900.
Preload hexagon socket screw with special tool 00 9 250 to 0.6 Nm.
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Fig. 363: Preloading Hexagon Socket Screw With Special Tool 00 9 250 To 0.6
Nm
Check special tools 11 9 190 for correct seating.
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Fig. 364: Securing Vibration Damper With Special Tool 11 9 190
Tighten down central screw (1 and 2) of the adjustment units with special tool 00 9 120.
Tightening torque 11 36 1AZ.
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Fig. 365: Identifying Central Bolts Of Intake And Exhaust Camshaft Adjusters
Remove special tools 11 9 190 and 11 8 570.
Crank engine at central bolt twice in direction of rotation until engine is in the 150º firing TDC position cylinder 1 again.
Mount special tool 11 8 570 on vibration damper with a bolt.
Secure special tool 11 9 190 in 150º firing TDC position cylinder 1.
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Fig. 366: Securing Vibration Damper With Special Tool 11 9 190
Check timing again. Remove all special tools.
READ NEXT:
Removing And Installing/Replacing Both Solenoid Valves On Left Side
(N63)
IMPORTANT: Always check that the solenoid valves are clean during removal
and
installation.
Possible malfunctions if valves are contaminated:
Irregular operation
OBD incorrect entry
Poor exhaust
Removing And Installing/Replacing Inlet And Exhaust Adjustment
Units On Right Side (N63)
Notes
IMPORTANT: When the engine is shut down, the inlet and exhaust camshaft
adjuster is
normally locked in its initial position.
The situation may arise in some individual cases where this initial
Oil Supply
CHECKING ENGINE OIL PRESSURE
Notes
WARNING: Risk of scalding!
NOTE: To check the engine oil pressure, remove the oil pressure switch and
install and
connect the special tool.
NOTE: A small amount of
SEE MORE:
Functions
Automatic Soft Close
The Automatic Soft Close function is an autonomous function. The only
connection to the car's electrical
system is Terminal 30 basic mode (Terminal 30B) and the ground connection. The
Automatic Soft Close
function is operational as of "Terminal 30B ON".
Circuit Diagram for an
Vibration Damper
REMOVING AND INSTALLING/RENEWING VIBRATION DAMPER (N63)
Necessary preliminary work
Remove FAN COWL
Remove A/C compressor DRIVE BELT
Remove alternator DRIVE BELT
Remove belt pulley for A/C system
Release screw (1).
Tightening torque 11 28 1AZ.
Remove belt tensioner with idler pulley (2).
Fig
