11 36 047 Removing And Installing/Replacing Inlet And Exhaust Adjustment Units On Left Side (N62/N62TU)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

11 9 190
11 9 460
11 9 461
11 9 462
11 9 463

(cylinder bank 5 to 8)

Necessary preliminary tasks:

Read fault memory and make a documentary record
Remove servomotor for left eccentric shaft . See 11 37 022 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR LEFT ECCENTRIC SHAFT (N62/N62TU) .
Remove left cylinder head cover . See 11 12 005 REMOVING AND INSTALLING/SEALING LEFT CYLINDER HEAD COVER (N62/N62TU) .
Remove all spark plugs on cylinder bank 5 to 8
If necessary, remove fan cowl
Remove left timing case cover . See 11 14 080 REMOVING AND INSTALLING TOP LEFT TIMING CASE COVER (N62/N62TU) .

Removal:

Removal of inlet and exhaust adjustment units is described separately from installation.

IMPORTANT: Screw (1) is a special screw and must not be replaced with a normal M8 screw.

Release screw (1).

Unclip oil line (3) from retainers (2) and remove.

Fig 1: Identifying Retainer And Screw

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Crank engine at central bolt in direction of rotation to firing TDC position of 1st cylinder.

NOTE: With 1st cylinder in firing TDC position, cams of inlet and exhaust camshafts at 5th cylinder point upwards at an angle as shown in graphic.

Fig 2: Locating Cam Lobe Position

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NOTE: Alignment hole for TDC position is at front on timing case cover.

Crank engine at central bolt and secure vibration damper with special tool 11 9 190 in firing TDC position of 1st cylinder.

Fig 3: Identifying Special Tool (11 9 190)

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IMPORTANT: When the engine is shut down, the inlet and exhaust adjustment unit 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 adjustment unit.
In order to avoid incorrect timing adjustment, it is essential to check the locking of the adjustment unit and if necessary perform locking by rotating the camshafts.

Checking locking of inlet adjustment unit in initial position:

Engage hexagon head of inlet camshaft and attempt to rotate inlet camshaft carefully against direction of rotation.

If there is no fixed connection between inlet camshaft and inlet adjustment unit, rotate inlet camshaft against direction of rotation as far as it will go.

The inlet adjustment unit is locked in the initial position when the inlet camshaft is non-positively connected to the inlet adjustment unit.

Fig 4: Rotating Inlet Camshaft

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Checking locking of exhaust adjustment unit in initial position:

Engage hexagon head of exhaust camshaft and attempt to rotate exhaust camshaft carefully in direction of rotation.

If there is no fixed connection between exhaust camshaft and exhaust adjustment unit, rotate exhaust camshaft in direction of rotation as far as it will go.

The exhaust adjustment unit is locked in the initial position when the exhaust camshaft is non-positively connected to the exhaust adjustment unit.

Fig 5: Rotating Exhaust Camshaft

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IMPORTANT: If the inlet or exhaust adjustment unit of the camshafts "cannot" be locked as described, the adjustment unit is faulty and must be replaced.

Remove special tool 11 9 190 .

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

Fig 6: Identifying Crank Shaft Rotation Angle

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NOTE: When slackening screws, grip camshafts at hexagon head.

Slacken screws of exhaust and inlet adjustment unit.

Fig 7: Locating Slacken Screws Of Exhaust And Inlet Adjustment Unit

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Remove screw on exhaust adjustment unit.

Fig 8: Locating Screw On Exhaust Adjustment Unit

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Vigorously press back tensioner rail (3) several times to remove oil in chain tensioner.

Feed out exhaust adjustment unit (2).

Fig 9: Pressing Back Tensioner Rail

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Remove screw on inlet adjustment unit.

Fig 10: Locating Screw On Inlet Adjustment Unit

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Feed out inlet adjustment unit (1).

Secure timing chain to prevent it from sliding down.

Fig 11: Identifying Inlet Adjustment Unit

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Installation:

Installation of inlet and exhaust adjustment units is described separately from removal.

IMPORTANT: Danger of mix-up:

Inlet and exhaust adjustment units are different.

Mixing up the inlet and exhaust adjustment units will cause damage to the engine.

Inlet adjustment unit (1) is marked with EIN and IN.
Exhaust adjustment unit (2) is marked with AUS and EX.

Fig 12: Identifying Inlet And Exhaust Adjustment Unit
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NOTE: Position of inlet adjustment unit (1) to timing chain can be freely selected.

Pull timing chain up.

Feed inlet adjustment unit (1) into timing chain and fit onto inlet camshaft.

Fig 13: Identifying Inlet Adjustment Unit

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Replace screw.

Install screw on inlet adjustment unit.

Tighten screw without play and then slacken off again by half a turn.

Fig 14: Locating Screw On Inlet Adjustment Unit

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NOTE: Position of exhaust adjustment unit (2) to timing chain can be freely selected.

Pull timing chain up.

Feed exhaust adjustment unit (2) into timing chain.

Press tensioner rail (3) back and fit exhaust adjustment unit (2) onto exhaust camshaft.

NOTE: If tensioner rail (3) cannot be pressed back far enough to enable fitting of exhaust adjustment unit (2):

Remove chain tensioner.

Place chain tensioner on a level surface and compress slowly and carefully.

Repeat this procedure twice.

Fig 15: Pressing Back Tensioner Rail

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Installation:

Replace sealing ring.

Install chain tensioner and tighten down.

Tightening torque 11 31 8AZ . See ENGINE - TIGHTENING TORQUES (N62TU V8) .

Fit exhaust adjustment unit (2).

Replace screw.

Install screw on exhaust adjustment unit.

Tighten screw without play and then slacken off again by half a turn.

Fig 16: Locating Screw On Exhaust Adjustment Unit

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Get special tool kit 11 9 460 ready for securing camshafts.

NOTE: Special tool 11 9 461 for securing inlet camshaft.
Special tool 11 9 462 for securing exhaust camshaft.
Special tool 11 9 463 (holder with screw).

Fig 17: Identifying Special Tool (11 9 461), (11 9 462) And (11 9 463)

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Place special tool 11 9 461 on inlet camshaft and align inlet camshaft so that special tool 11 9 461 rests without a gap on cylinder head.

Fig 18: Identifying Special Tool (11 9 461)

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Fit special tool 11 9 463 , secure screw (1) in thread for oil line and tighten down by hand.

Fig 19: Identifying Special Tool (11 9 461) And (11 9 463)

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IMPORTANT: Make sure screws of inlet and exhaust adjustment units have been slackened off by a half turn.

Crank engine at central bolt from 45° before TDC position in direction of rotation to firing TDC position.

Secure vibration damper with special tool 11 9 190 in firing TDC position of 1st cylinder.

Fig 20: Identifying Special Tool (11 9 190)

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NOTE: When tightening down screw (1), grip camshaft at hexagon head.

Tighten down screw (1) of inlet adjustment unit.

Tightening torque 11 36 16AZ . See ENGINE - TIGHTENING TORQUES (N62TU V8) .

Fig 21: Identifying Special Tool (11 9 461)

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Release screw (1) and remove special tools 11 9 463 /11 9 461 from inlet camshaft.

Fig 22: Identifying Special Tool (11 9 461) And (11 9 463)

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Place special tool 11 9 462 on exhaust camshaft and align exhaust camshaft so that special tool 11 9 462 rests without a gap on cylinder head.

Fig 23: Identifying Special Tool (11 9 462)

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Fit special tool 11 9 463 , secure screw (1) in thread for oil line and tighten down by hand.

Fig 24: Identifying Special Tool (11 9 462) And (11 9 463)

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NOTE: When tightening down screw (2), grip camshaft at hexagon head.

Tighten down screw (2) of exhaust adjustment unit.

Tightening torque 11 36 16AZ . See ENGINE - TIGHTENING TORQUES (N62TU V8) .

Fig 25: Identifying Special Tool (11 9 462)

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Release screw (1) and remove special tools 11 9 463 /11 9 462 from exhaust camshaft.

Fig 26: Identifying Special Tool (11 9 462) And (11 9 463)

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Remove special tool 11 9 190 .

Crank engine at central bolt twice in direction of rotation until engine returns to firing TDC position of 1st cylinder.

Secure vibration damper with special tool 11 9 190 in firing TDC position of 1st cylinder.

Fig 27: Identifying Special Tool (11 9 190)

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Place special tool 11 9 461 on inlet camshaft and check timing.

NOTE: The timing is correctly adjusted when special tool 11 9 461 rests flat on the cylinder head or protrudes by up to 0.5 mm to the exhaust side.

Remove special tool 11 9 461 from inlet camshaft.

Fig 28: Identifying Special Tool (11 9 461)

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Place special tool 11 9 462 on exhaust camshaft and check timing.

NOTE: The timing is correctly adjusted when special tool 11 9 462 rests flat on the cylinder head or protrudes by up to 0.5 mm to the exhaust side.

Fig 29: Identifying Special Tool (11 9 462)

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Remove all special tools.

IMPORTANT: Screw (1) is a special screw and must not be replaced with a normal M8 screw.

Clip oil line (3) into retainers (2).

Insert screw (1) and tighten down.

Assemble engine.

Fig 30: Identifying Retainer And Screw

Courtesy of BMW OF NORTH AMERICA, INC.