11 36 610 Removing and installing/replacing left camshaft adjustment unit (M62 VANOS from 9/98): Removal

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

Remove intake filter housing with air-mass flow sensor.

Remove fan impeller with fan clutch and fan cowl.

Remove both cylinder head covers.

Remove spark plugs.

CAUTION: In firing TDC position, the inlet camshaft 1 to 4 rotates in the teeth of the camshaft adjustment unit. This twisting is caused by the position of the cams and is not an indication for incorrect timing.

Fig 1: Identifying Inlet Camshaft Rotation

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Removal of the left camshaft adjustment unit is described separately from installation. Assembly sequence for removal and installation is different.

Remove oil lines on left and right of cylinder head.

Fig 2: Removing Oil Lines On Left And Right Of Cylinder Head

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Turn engine in direction of rotation as far as TDC firing position of first cylinder.

Fig 3: Rotating Camshaft To TDC (Overlap)

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E53

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

Fig 4: Securing Crankshaft In TDC Position

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Remove chain tensioning piston. See 11 31 090 INSTALLING AND REMOVING/REPLACING PISTON FOR CHAIN TENSIONER (M62) .

Remove both timing case covers at top. See 11 14 080 REMOVING AND INSTALLING TIMING CASE COVER, TOP LEFT (M62 VANOS FROM 9/98) and 11 14 085 REMOVING AND INSTALLING TIMING CASE COVER, TOP RIGHT (M62 VANOS FROM 9/98) .

CAUTION: Left-hand threads.

Release nut (1) on sensor gear screw connection on cylinder bank 5 to 8.

Fig 5: Releasing Sensor Gear Screw Connection Nut (Cylinder Bank 5 To 8)

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Remove sensor gear (2) on cylinder bank 5 to 8.

Fig 6: Removing Sensor Gear (Cylinder Bank 5 To 8)

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CAUTION: Left-hand threads.

Release nut (1) on sensor gear screw connection on cylinder bank 1 to 4.

Fig 7: Releasing Sensor Gear Screw Connection Nut (Cylinder Bank 1 To 4)

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Remove sensor gear (2) on cylinder bank 1 to 4.

Fig 8: Removing Sensor Gear (Cylinder Bank 1 To 4)

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CAUTION: Do not damage the cylinder head.

If necessary, machine open-end wrench accordingly.

When releasing camshaft screw connection: grip camshaft at hexagon head.

Fig 9: Gripping Camshaft At Hexagon Head

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CAUTION: Left-hand threads.

Slacken screw connection (1) of exhaust camshaft on cylinder bank 5 to 8 by approx. a half turn.

Fig 10: Slackening Screw Connection Of Exhaust Camshaft (Cylinder Bank 5 To 8)

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CAUTION: Left-hand threads.

When releasing camshaft screw connection: grip camshaft at hexagon head.

Slacken screw connection (1) of exhaust camshaft on cylinder bank 1 to 4 by approx. a half turn.

Fig 11: Slackening Screw Connection Of Exhaust Camshaft (Cylinder Bank 1 To 4)

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CAUTION: Left-hand threads.

When releasing camshaft screw connection: grip camshaft at hexagon head.

Slacken screw connection (2) of inlet camshaft on cylinder bank 5 to 8 by approx. a half turn.

Fig 12: Slackening Screw Connection Of Inlet Camshaft (Cylinder Bank 5 To 8)

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CAUTION: Left-hand threads.

When releasing camshaft screw connection: grip camshaft at hexagon head.

Slacken screw connection (2) of inlet camshaft on cylinder bank 1 to 4 by approx. a half turn.

Fig 13: Slackening Screw Connection Of Inlet Camshaft (Cylinder Bank 1 To 4)

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Align camshafts.

Attach special tool 11 2 445/11 2 441 to camshafts, cylinder bank 1 to 4.

Fig 14: Attaching Special Tool 11 2 446/11 2 442 To Camshafts (Cylinder Bank 1 To 4)

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Attach special tool 11 2 443 to special tool 11 2 445/11 2 441 and secure with special tool 11 2 444 via spark plug thread.

Fig 15: Connecting Special Tool 11 2 443 To Special Tool 11 2 445/11 2 441 (Cylinder Bank 1 To 4)

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Align camshafts.

Attach special tool 11 2 446/11 2 442 to camshafts, cylinder bank 5 to 8.

Fig 16: Attaching Special Tool 11 2 446/11 2 442 To Camshafts (Cylinder Bank 5 To 8)

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Attach special tool 11 2 443 to special tool 11 2 446/11 2 442 and secure with special tool 11 2 444 via spark plug thread.

Fig 17: Connecting Special Tool 11 2 443 To Special Tool 11 2 445/11 2 441 (Cylinder Bank 5 To 8)

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Compress chain tensioner on cylinder bank 5 to 8 and lock with special tool 11 3 310.

Fig 18: Locking Chain Tensioner With Special Tool 11 3 310 (Cylinder Bank 5 To 8)

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CAUTION: Left-hand threads.

Remove screws (1 and 2) on cylinder bank 5 to 8.

Fig 19: Removing Camshaft Screws (Cylinder Bank 5 To 8)

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Pull exhaust sprocket wheel (1) and camshaft adjustment unit (2) forwards until they are no longer secured on camshafts.

Fig 20: Releasing Exhaust Sprocket And Camshaft Adjustment Unit From Camshafts (Cylinder Bank 5 To 8)

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Feed out timing chain (1) forwards over sprocket wheel of camshaft adjustment unit (2).

Fig 21: Removing Timing Chain Over Sprocket Wheel Of Camshaft Adjustment Unit (Cylinder Bank 5 To 8)

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Feed out exhaust sprocket wheel with secondary chain and camshaft adjustment unit (2).