Installation

Installing timing chain (M62 VANOS from 9/98)

Special tools required
00 9 250
11 2 300
11 2 441
11 2 442
11 2 443
11 2 444
11 2 445
11 2 446
11 4 230
11 4 231
11 4 232
11 5 180
11 6 440
11 6 450
11 6 451
11 6 452
11 7 380

Installation
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.
1. Insert throttle ring ( 1 ) in reversing rail
2. Replace O-ring ( 2 ) and insert in reversing rail
3. Replace O-ring ( 3 )
Coat O-ring ( 3 ) with oil as lubricant.

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

Note: Screws ( 2 ) with M6 thread.
Screws ( 3 ) with M7 thread.

Tighten screws ( 2 and 3 ).
Tightening Torque for screws ( 2 and 3 ) 14 Nm
Note: Engines in E53 (X5) have an external oil separator. Grub screw ( 1 ) is not fitted.

Replace grub screw ( 1 ).
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 ).

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

Raise timing chain slightly in area of guide rail.
Slide guide rail over guide pin until retaining lug can be heard to snap into place on lower guide pin.
Align timing chain to guide rail.

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

Insert screws ( 1 and 2 ).
Tighten screw ( 2 ).
Tighten down screw ( 1 ) for oil separator.

Replace O-ring ( 1 ).
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 ).
Tighten down screw on tensioning rail.

Install timing case cover at bottom.
Install upper oil sump section.

E38/E39

Secure crankshaft with special tool 11 2 300 in TDC firing position.

E53 (X5)

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

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

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

Install special tool 11 4 230 in special tool 11 7 380.
Screw in adjustment screw on tensioning rail but do not tighten yet.

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 screw connection on oil line on cylinder bank 5 to 8.
Set multimeter to acoustic continuity test.

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.

Note:
Turning the camshaft adjustment unit at 40 Nm to the left-hand stop ensures that the end position has been 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 by a 1/4 turn.

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 by a 1/4 turn.

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 screw connection on oil line on cylinder bank 1 to 4.
Set multimeter to acoustic continuity test.

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.

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 by a 1/4 turn.

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 by a 1/4 turn.

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.

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.

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.

Caution: Left-hand threads.

Tighten down screw connection ( 2 ) of inlet camshaft on cylinder bank 5 to 8.
Tightening Torque 110 Nm

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 125 Nm

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.

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 110 Nm

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

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.

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

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 40 Nm

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

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

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.

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

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 40 Nm

Remove special tool 11 6 452 from left cylinder head on cylinder bank 5 to 8.

Remove special tools 11 2 444/ 11 2 443/ 11 2 445/ 11 2 441.

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

Relieve tension on special tool 11 4 230.
Remove special tool 11 7 380 from right cylinder head on cylinder bank 1 to 4.

Install oil lines on left and right of cylinder head.

Install both top timing case covers.
Install chain tensioning piston.

E38/E38

Remove special tool 11 2 300.

E53 (X5)

Secure crankshaft in TDC position with special tool 11 5 180

Assemble engine.