11 31 051 Replacing timing chain (M62 VANOS from 9/98): Installation

WARNING: This page is about a different car, the 2003 BMW X5 and 2002 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Installation of timing chain is described separately from removal. Assembly sequence for removal and installation is different.

Check guide, reversing and tensioning rails, replace if necessary.

NOTE: There is a small bore in the throttle ring (1).

Check throttle ring (1), replace if necessary.

Coat O-ring (3) with oil as lubricant.

Fig 1: Identifying O-Ring And Throttle Ring In Reversing Ring

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Install reversing rail and insert screws (2 and 3).

Fig 2: Installing Reversing Rail

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NOTE: Screws (2) with M6 thread.

Screws (3) with M7 thread.

Tighten screws (2 and 3).

Tightening torque for screws (2 and 3). See 11 31 10AZ in ENGINE - TIGHTENING TORQUES - X5 4.6L .

NOTE: Engines in E53 (X5) have an external oil separator. Grub screw (1) and angle section are not fitted.

Replace grub screw (1).

Fig 3: Replacing Grub Screw

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Insert grub screw only until it makes contact with angle section (1) without play, do not tighten down.

NOTE: The grub screw (1) secures the angle bracket in the cylinder head.

NOTE: The position of the camshaft adjustment unit when fitting and feeding on the timing chain is not assigned and can be freely selected.

Install timing chain over reversing rail, camshaft adjustment unit of cylinder bank 5 to 8 and over crankshaft sprocket wheel.

NOTE: Install timing chain inside screw-in pin (1).

Fig 4: Installing Timing Chain

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Feed timing chain (1) onto camshaft adjustment unit of cylinder bank 1 to 4.

Fig 5: Feeding Timing Chain Onto Camshaft Adjustment Unit Of Cylinder Bank 1 To 4

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Raise timing chain slightly in area of guide rail.

Slide guide rail over guide pin until retaining lug can be heard snapping into place on lower guide pin.

Align timing chain to guide rail.

Fig 6: Installing Timing Chain To Guide Rail

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NOTE: Engines in E53 (X5) have an external oil separator. Screw (1) is not fitted.

Insert screws (1 and 2).

Fig 7: Tightening Timing Chain To Guide Rail Screws

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Tighten screw (2).

Tighten down screw (1) for oil separator.

Replace O-ring (1).

Fig 8: Replacing O-Ring

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Install oil guide for bow cover in the pivot rail.

Insert screw on tensioning rail.

Press bow cover against the timing chain. Secure bow cover with a plastic strap (1).

Fig 9: Securing Bow Cover With Plastic Strap

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Tighten down screw on tensioning rail.

Install timing case cover at bottom.

Install upper oil sump section.

E53

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

Fig 10: Securing Crankshaft In TDC Position

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Fit special tool 11 7 380 to right cylinder head on cylinder bank 1 to 4.

Fig 11: Fitting Special Tool 11 7 380 To Right Cylinder Head (Cylinder Bank 1 To 4)

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NOTE: The special tool kit 11 3 390 can no longer be fitted in the E53 (X5) with M62 engine due to the altered space conditions.

With the market launch of the E53 (X5) with M62 engine, the special tool kit 11 3 390 is dropped.

The shorter special tool kit 11 4 230 comprising special tools 11 4 231 and 11 4 232 replaces the special tool kit 11 3 390.

Fig 12: Precaution When Using Special Tool Kit 11 3 390

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Insert special tool 11 4 230 in special tool 11 7 380.

Screw in adjustment screw on tensioning rail, but do not tighten yet.

Fig 13: Inserting Special Tool 11 4 230 In Special Tool 11 7 380

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NOTE: The continuity test with the multimeter described in the following is not possible on the M62 B46 because of the different design of the camshaft adjustment unit.

The remaining procedure is identical.

Connect a commercially available multimeter to a contact pin on camshaft adjustment unit and to the screw connection on oil line on cylinder bank 5 to 8.

Set multimeter to acoustic continuity test.

Fig 14: Connecting Multimeter To Screw Connection On Oil Line (Cylinder Bank 5 To 8)

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Attach special tool 11 6 440 to camshaft adjustment unit on cylinder bank 5 to 8 and move at 40 Nm to left-hand stop.

Check left-hand stop of camshaft adjustment unit with acoustic continuity test on multimeter.

Fig 15: Connecting Special Tool 11 6 440 To Camshaft Adjustment Unit (Cylinder Bank 5 To 8)

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NOTE: Rotating the camshaft adjustment unit at 40 Nm to the left-hand stop ensures that the end position is reached and there is no longer an "oil cushion" before the left-hand stop of the camshaft adjustment unit.

In the camshaft adjustment unit, there are three contacts which are closed when the unit is at the left-hand stop.

During the acoustic continuity test with the multimeter, a sound signal can be heard when the camshaft adjustment unit is at the left-hand stop.

CAUTION: Left-hand threads.

Tighten screw connection (2) of inlet camshaft on cylinder bank 5 to 8 to an initial torque of 15 Nm and then slacken off again by a 1/4 turn.

Fig 16: Tightening Inlet Camshaft Screw (Cylinder Bank 5 To 8)

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CAUTION: Left-hand threads.

Tighten screw connection (1) of exhaust camshaft on cylinder bank 5 to 8 to an initial torque of 15 Nm and then slacken off again by a 1/4 turn.

Fig 17: Tightening Exhaust Camshaft Screw (Cylinder Bank 5 To 8)

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NOTE: The continuity test with the multimeter described in the following is not possible on the M62 B46 because of the different design of the camshaft adjustment unit.

The remaining procedure is identical.

Connect a commercially available multimeter to a contact pin on camshaft adjustment unit and to the screw connection on oil line on cylinder bank 1 to 4.

Set multimeter to acoustic continuity test.

Fig 18: Connecting Multimeter To Screw Connection On Oil Line (Cylinder Bank 1 To 4)

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Attach special tool 11 6 440 to camshaft adjustment unit on cylinder bank 1 to 4 and move at 40 Nm to left-hand stop.

Check left-hand stop of camshaft adjustment unit with acoustic continuity test on multimeter.

Fig 19: Connecting Special Tool 11 6 440 To Camshaft Adjustment Unit (Cylinder Bank 1 To 4)

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CAUTION: Left-hand threads.

Tighten screw connection (2) of inlet camshaft on cylinder bank 1 to 4 to an initial torque of 15 Nm and then slacken off again by a 1/4 turn.

Fig 20: Tightening Inlet Camshaft Screw (Cylinder Bank 1 To 4)

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CAUTION: Left-hand threads.

Tighten screw connection (1) of exhaust camshaft on cylinder bank 1 to 4 to an initial torque of 15 Nm and then slacken off again by a 1/4 turn.

Fig 21: Tightening Exhaust Camshaft Screw (Cylinder Bank 1 To 4)

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Pretension tensioning rail by turning adjusting screw on special tool 11 4 230 with special tool 00 9 250 to 0.7 Nm.

NOTE: If installation tolerance is unfavorable, attach special tool 00 9 250 from underside.

Fig 22: Turning Adjusting Screw Using Special Tool 00 9 250

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NOTE: Pretensioning the timing chain moves the camshaft adjustment unit and the unit must therefore be reset to the left-hand stop.

Attach special tool 11 6 440 to camshaft adjustment unit on cylinder bank 5 to 8 and move at 40 Nm to left-hand stop.

Check left-hand stop of camshaft adjustment unit with acoustic continuity test on multimeter.

Fig 23: Connecting Special Tool 11 6 440 To Camshaft Adjustment Unit (Cylinder Bank 5 To 8)

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CAUTION: Do not damage the cylinder head.

If necessary, machine open-end wrench accordingly.

When tightening down camshaft screw connection: grip camshaft at hexagon head.

Fig 24: Gripping Camshaft At Hexagon Head

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CAUTION: Left-hand threads.

Tighten down screw connection (2) of inlet camshaft on cylinder bank 5 to 8.

Tightening torque, see 11 36 14AZ in ENGINE - TIGHTENING TORQUES - X5 4.6L .

Fig 25: Tightening Inlet Camshaft Screw (Cylinder Bank 5 To 8)

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CAUTION: Left-hand threads.

When tightening down camshaft screw connection: grip camshaft at hexagon head.

Tighten down screw connection (1) of exhaust camshaft on cylinder bank 5 to 8.

Tightening torque, see 11 36 13AZ in ENGINE - TIGHTENING TORQUES - X5 4.6L .

Fig 26: Tightening Exhaust Camshaft Screw (Cylinder Bank 5 To 8)

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NOTE: The continuity test with the multimeter described in the following is not possible on the M62 B46 because of the different design of the camshaft adjustment unit.

The remaining procedure is identical.

Attach special tool 11 6 440 to camshaft adjustment unit on cylinder bank 1 to 4 and move at 40 Nm to left-hand stop.

Check left-hand stop of camshaft adjustment unit with acoustic continuity test on multimeter.

Fig 27: Connecting Special Tool 11 6 440 To Camshaft Adjustment Unit (Cylinder Bank 1 To 4)

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CAUTION: Left-hand threads.

When tightening down camshaft screw connection: grip camshaft at hexagon head.

Tighten down screw connection (2) of inlet camshaft on cylinder bank 1 to 4.

Tightening torque, see 11 36 14AZ in ENGINE - TIGHTENING TORQUES - X5 4.6L .

Fig 28: Tightening Inlet Camshaft Screw (Cylinder Bank 1 To 4)

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CAUTION: Left-hand threads.

When tightening down camshaft screw connection: grip camshaft at hexagon head.

Tighten down screw connection (1) of exhaust camshaft on cylinder bank 1 to 4.

Tightening torque, see 11 36 13AZ in ENGINE - TIGHTENING TORQUES - X5 4.6L .

Fig 29: Tightening Exhaust Camshaft Screw (Cylinder Bank 1 To 4)

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Attach sensor gear (2) to cylinder bank 1 to 4.

Fig 30: Connecting Sensor Gear (Cylinder Bank 1 To 4)

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CAUTION: Left-hand threads.

Fit nut (1) of sensor gear screw connection on cylinder bank 1 to 4 and initially tighten without play, but do not tighten down yet.

Fig 31: Fitting Sensor Gear Screw (Cylinder Bank 1 To 4)

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NOTE: Special tool kit 11 6 450 comprises:

Special tool 11 6 451 for cylinder bank 1 to 4

Special tool 11 6 452 for cylinder bank 5 to 8

Fig 32: Aligning Locating Bore On Sensor Gear (Cylinder Bank 1 To 4) To Positioning Pin On Special Tool 11 6 451

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Align locating bore (1) on sensor gear of cylinder bank 1 to 4 to positioning pin on special tool 11 6 451. Fit special tool 11 6 451, insert screws and initially tighten without play. Press special tool 11 6 451 downwards and align to cylinder head. Tighten down special tool 11 6 451.

CAUTION: Left-hand threads.

Tighten down nut (1) on sensor gear screw connection.

Tightening torque, see 11 36 15AZ in ENGINE - TIGHTENING TORQUES - X5 4.6L .

Fig 33: Tightening Sensor Gear Screw Connection

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Remove special tool 11 6 451 from right cylinder head on cylinder bank 1 to 4.

Fig 34: Removing Special Tool 11 6 451 From Right Cylinder Head (Cylinder Bank 1 To 4)

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Attach sensor gear (2) to cylinder bank 5 to 8.

Fig 35: Installing Sensor Gear (Cylinder Bank 5 To 8)

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CAUTION: Left-hand threads.

Fit nut (1) of sensor gear screw connection on cylinder bank 5 to 8 and initially tighten without play, but do not tighten down yet.

Fig 36: Fitting Sensor Gear Screw Connection (Cylinder Bank 5 To 8)

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NOTE: Special tool kit 11 6 450 comprises:

Special tool 11 6 451 for cylinder bank 1 to 4

Special tool 11 6 452 for cylinder bank 5 to 8

Fig 37: Aligning Locating Bore On Sensor Gear (Cylinder Bank 5 To 8) To Positioning Pin On Special Tool 11 6 452

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Align locating bore (1) on sensor gear of cylinder bank 5 to 8 to positioning pin on special tool 11 6 452. Fit special tool 11 6 452, insert screws and initially tighten without play. Press special tool 11 6 452 downwards and align to cylinder head. Tighten down special tool 11 6 452.

CAUTION: Left-hand threads.

Tighten down nut (1) on sensor gear screw connection.

Tightening torque, see 11 36 15AZ in ENGINE - TIGHTENING TORQUES - X5 4.6L .

Fig 38: Tightening Sensor Gear Screw Connection