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Home >> BMW >> 2012 >> Alpina B7Lx >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair >> Variable Camshaft Timing >> 11 36 047 Removing and installing/replacing inlet and exhaust adjustment units on left side (N63) >> (cylinder bank 5 to 8)

(cylinder bank 5 to 8)

Necessary preliminary work 

To release central bolts, use special tool 11 9 890 or grip at hexagon head of camshaft.

Fig 1: Releasing Central Bolts Using Special Tool (11 9 890)
G06178663Courtesy of BMW OF NORTH AMERICA, INC.
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.

Fig 2: Identifying Intake And Exhaust Camshaft Adjusters Central Bolts
G06178664Courtesy of BMW OF NORTH AMERICA, INC.
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 replaced due to safety reasons.

Installation note: 

Coat contact face of central bolt (1) with copper paste.

Fig 3: Locating Contact Surface Of Central Bolt
G06178590Courtesy of BMW OF NORTH AMERICA, INC.

Release hexagon socket screw.

Release special tool 11 9 900 at knurled screws and remove.

Fig 4: Releasing Special Tool (11 9 900) At Knurled Screws
G06178562Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove upper tensioning rail (2).

NOTE: Shown without special tools for purposes of clarity.
Fig 5: Identifying Upper Tensioning Rail And Screws
G06178667Courtesy of BMW OF NORTH AMERICA, INC.

Remove central bolt (2) of inlet adjustment unit.

Installation note: 

Replace central bolts after releasing.

Fig 6: Identifying Inlet Adjustment Unit Central Bolts
G06178664Courtesy of BMW OF NORTH AMERICA, INC.

Detach inlet adjustment unit (1) in direction of arrow from inlet camshaft.

Fig 7: Detaching Inlet Adjustment Unit
G06178669Courtesy of BMW OF NORTH AMERICA, INC.

Feed out inlet adjustment unit (2) from timing chain (1).

Lift out inlet adjustment unit (2).

Fig 8: Identifying Inlet Adjustment Unit And Timing Chain
G06178670Courtesy of BMW OF NORTH AMERICA, INC.

Remove central bolt (1) of exhaust adjustment unit.

Installation note: 

Replace central bolts after releasing.

Fig 9: Identifying Inlet Adjustment Unit Central Bolts
G06178664Courtesy of BMW OF NORTH AMERICA, INC.

Detach exhaust adjustment unit (1) in direction of arrow from exhaust camshaft.

Fig 10: Detaching Exhaust Adjustment Unit
G06178672Courtesy of BMW OF NORTH AMERICA, INC.

Feed out exhaust adjustment unit (2) from timing chain (1).

Lift out exhaust adjustment unit (2).

Fig 11: Identifying Exhaust Adjustment Unit And Timing Chain
G06178673Courtesy of BMW OF NORTH AMERICA, INC.
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.
  1. Intake camshaft adjuster (1) is marked IN 
  2. Exhaust camshaft adjuster (2) is marked OUT 
    Fig 12: Identifying Intake And Exhaust Camshaft Adjuster Markings (EIN And AUS)
    G06178674Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Coat contact face of central bolt (1) with copper paste.

Fig 13: Locating Contact Surface Of Central Bolt
G06178590Courtesy of BMW OF NORTH AMERICA, INC.
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 90  °.

Fig 14: Identifying Inlet Adjustment Unit Central Bolts
G06178664Courtesy of BMW OF NORTH AMERICA, INC.

Fit sliding rail (2) and secure with screws (1).

Tightening torque: 11 31 4AZ .

Fig 15: Identifying Sliding Rail And Screws
G06178677Courtesy of BMW OF NORTH AMERICA, INC.

Get set of special tools 11 9 890 ready for securing camshafts.

Fig 16: Identifying Special Tools
G06178597Courtesy of BMW OF NORTH AMERICA, INC.

Place special tool 11 9 893 on exhaust camshaft.

Fig 17: Checking Exhaust Camshaft Timing Adjustment Using Special Tool (11 9 893)
G06178568Courtesy of BMW OF NORTH AMERICA, INC.

Fit special tool 11 9 893 on intake camshaft.

Fig 18: Checking Intake Camshaft Timing Adjustment Using Special Tool (11 9 893)
G06178569Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 19: Attaching Special Tool (11 9 894) Into Cylinder Head
G06178591Courtesy of BMW OF NORTH AMERICA, INC.

Press special tool 11 9 892 down with special tool 11 9 891 .

Fig 20: Pressing Special Tool (11 9 892) Down Using Special Tool (11 9 891)
G06178592Courtesy of BMW OF NORTH AMERICA, INC.

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  .

Fig 21: Pretensioning Timing Chain Using Special Tool (11 9 900)
G06178562Courtesy of BMW OF NORTH AMERICA, INC.

Check special tools 11 9 190 for correct seating.

Fig 22: Securing Vibration Damper Using Special Tools
G06178565Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down central screw (1 and 2) of the adjustment units with special tool 00 9 120 .

Tightening torque 11 36 1AZ .

Fig 23: Identifying Adjustment Units Central Screw
G06178589Courtesy of BMW OF NORTH AMERICA, INC.

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 150° 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 150° firing TDC position cylinder 1  .

Fig 24: Securing Vibration Damper Using Special Tools
G06178565Courtesy of BMW OF NORTH AMERICA, INC.

Check timing  . See 11 31 070 CHECKING CAMSHAFT TIMING ON LEFT SIDE (N63)  or 11 31 071 CHECKING CAMSHAFT TIMING ON RIGHT SIDE (N63)  again.

Remove all special tools.

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