BMW X5: Removing And Installing/Replacing Left Exhaust Camshaft (N62/N62TU)

(cylinder bank 5 to 8)

Necessary preliminary tasks:

• Remove servomotor for left eccentric shaft.
• Remove ignition coils on cylinder bank 5 to 8.
• Remove left cylinder head cover.
• Remove spark plugs on cylinder bank 5 to 8.
• Remove left inlet and exhaust adjustment units.

Remove slide rail (1).

Fig. 285: Identifying Slide Rail

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

Fig. 286: Locating Exhaust Camshaft On Cylinder

IMPORTANT: Camshaft bearing caps of cylinders 1 to 4 and 5 to 8 must not be mixed up.

NOTE: Bearing caps of exhaust camshaft are marked on cylinder bank 5 to 8 with R A1 to R A5 from inlet side.

Release nuts and remove bearing cap R A1.

Fig. 287: Identifying Camshaft Bearing Caps Of Cylinders

NOTE: Retaining clips (1) for oil line are fitted on bearing caps 3 and 5.

Release nuts on bearing caps R A2 to R A5.

Fig. 288: Identifying Retaining Clips For Oil Line Fitted On Bearing Caps

Remove bearing caps R A2 to R A5.

Fig. 289: Identifying Camshaft Bearing Caps Of Cylinders

Remove exhaust camshaft (1).

Fig. 290: Identifying Exhaust Camshaft

If necessary, replace plain compression rings (1).

IMPORTANT: Plain compression rings (1) can easily break.

Plain compression rings (1) are engaged at joint.

Press compression ring (1) on one side into groove, pull up on other side and remove catch.

Carefully pull compression ring (1) apart and remove towards front.

Fig. 291: Pulling Compression Ring

If necessary, replace sensor gear (1).

Release screw (2) and remove sensor gear (1).

Fig. 292: Identifying Sensor Gear And Screw

Installation:

Installation of exhaust camshaft is described separately from removal.

Clean all bearings and cams of exhaust camshaft and lubricate with engine oil.

NOTE: Camshaft has a groove and sensor gear has a lug for fastening purposes.

Fig. 293: Locating Camshaft Groove And Sensor Gear

Fit sensor gear (1) and align to groove in camshaft.

Insert screw (2) and tighten down.

Tightening torque 11 31 14AZ.

Fig. 294: Identifying Sensor Gear And Screw

Installing plain compression rings (1):

IMPORTANT: Plain compression rings (1) can easily break.

Carefully pull compression ring (1) apart and install from front.

Press compression ring (1) on one side into groove, install catch on other side.

Fig. 295: Installing Plain Compression Rings

NOTE: Rocker arms (1) of exhaust camshaft are of same design as rocker arms of inlet camshaft.

The classification 3 shown in the graphic has no effect on the function on the exhaust camshaft.

Fig. 296: Locating Rocker Arms Of Exhaust Camshaft

IMPORTANT: Rocker arms (1) slip slightly when exhaust camshaft is fitted.

Make sure rocker arms (1) are secured as illustrated on hydraulic valve clearance compensating elements and on valves.

Used rocker arms (1) may only be reused in the same position.

Align rockers (1) straight.

Fig. 297: Identifying Rocker Arms

Lubricate exhaust camshaft and bearing caps with engine oil.

Install exhaust camshaft (1).

Rotate exhaust camshaft (1) until exhaust cam on cylinder 6 is facing upwards.

Fig. 298: Identifying Exhaust Camshaft

Check dowel sleeves (2) for damage and correct installation position.

Ends of compression rings (1) point upwards.

Make sure compression rings (1) are engaged at ends.

Fig. 299: Locating Dowel Sleeves And Compression Rings

IMPORTANT: Camshaft bearing caps of cylinders 1 to 4 and 5 to 8 must not be mixed up.

NOTE: Bearing caps of exhaust camshaft are marked on cylinder bank 5 to 8 with R A1 to R A5 from inlet side.

Fit bearing caps R A2 to R A5.

Fig. 300: Identifying Camshaft Bearing Caps Of Cylinders

NOTE: Retaining clips (1) for oil line are fitted on bearing caps 3 and 5.

Insert nuts and tighten by hand without play.

Tighten down nuts on bearing caps R A2 to R A5 in 1/2 turn increments evenly from inside to outside.

Tightening torque 11 31 1AZ.

Fig. 301: Identifying Retaining Clips For Oil Line Fitted On Bearing Caps

IMPORTANT: Camshaft bearing caps of cylinders 1 to 4 and 5 to 8 must not be mixed up.

Fit bearing cap R A1 in such a way that marking is legible from inlet side.

Install nuts and tighten down.

Tightening torque 11 31 1AZ.

Fig. 302: Identifying Camshaft Bearing Caps Of Cylinders

NOTE: A gasket (2) is installed between cylinder head and slide rail (1).

Replace gasket (2) and preinstall on slide rail (1).

Fig. 303: Identifying Cylinder Head And Slide Rail

Install slide rail (1) with gasket, insert screw and tighten down.

Fig. 304: Identifying Slide Rail

Rotate exhaust camshaft against direction of rotation until cam on 5th cylinder points upwards at an angle as shown in illustration.

Fig. 305: Locating Exhaust Camshaft

Install inlet and exhaust adjustment unit on left side.

Install spark plugs on cylinder bank 5 to 8.

Install left cylinder head cover.

Install ignition coils on cylinder bank 5 to 8.

Assemble engine.

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