E53 (X5)

Pull special tool 11 5 180 back until flywheel is no longer secured in position.

Fig 1: Pulling Special Tool 11 5 180 For Securing Flywheel

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Lift timing chain and hold under tension.

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

Fig 2: Identifying Central Bolt

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Remove special tools 11 2 444 / 11 2 443 / 11 2 442 / 11 2 446.

Fig 3: Identifying Special Tools

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Fig 4: Removing Camshaft Screw

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Rotate exhaust camshaft at hexagon head until exhaust cam on cylinder 6 is facing upwards.

Rotate inlet camshaft at hexagon head until inlet cam on cylinder 8 is facing upwards.

Fig 5: Identifying Cam Facing Upwards

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Release bearing caps of exhaust and inlet camshafts on cylinder bank 5 to 8 in 1/2 turn increments uniformly from outside to inside.

Remove bearing covers on cylinder bank 5 to 8 and place to one side in order.

Lift out camshafts.

Fig 6: Releasing Bearing Caps Of Exhaust And Inlet Camshafts On Cylinder Bank 5 To 8

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Crank engine from 45° before TDC position in direction of rotation up to TDC position.

Hold crankshaft in TDC position with special tool 11 5 180.

Fig 1: Identifying Special Tool 11 5 180 For Holding Crankshaft In TDC Position

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Install distributor on left camshaft adjustment unit.

Install left camshaft adjustment unit.

Install timing case covers at top left and top right.

Install chain tensioning piston.

Install both cylinder head covers.

Assemble engine.