Removing and installing/replacing left exhaust camshaft (S63T2) (X5 M)

Special tools required:

11 4 480

(cylinder bank 5 to 8)

IMPORTANT: Exhaust camshaft must be stress-free before dismantling and installation.

Necessary preliminary tasks:

Remove LEFT CYLINDER HEAD COVER .
Remove EXHAUST CAMSHAFT ADJUSTER on left side.

IMPORTANT: No cam on the exhaust camshaft is permitted to press directly onto a roller cam follower.
With cylinder no. 1 at 150° before TDC firing position there is no piston in the TDC position.

Use an open-end spanner (1) to twist exhaust camshaft (2) at mounting flats into a suitable position.

Release screws of camshaft bearing from outside inwards in 1/2 turns.

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Set down all bearing caps in a tidy and orderly fashion on special tool 11 4 480.

Remove roller tappet from bearing cap (2 and 3) of high pressure pump and set down on special tool 11 4 480.

Remove left exhaust camshaft and set down on special tool 11 4 480.

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IMPORTANT: Rocker arms (1) can slide slightly during installation of exhaust camshaft. Make sure rocker arms (1) are secured as illustrated on hydraulic valve clearance compensating elements and on valves.

Align all rocker arms (1).

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Plastic rings (1) are maintenance-free and must not be replaced.

Check plastic rings for damage.

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Plastic plain rectangular compression ring:

Plain rectangular compression rings are preassembled on a new camshaft.

Plain rectangular compression rings (1) are maintenance-free and must only be replaced if damaged.

Insert plain rectangular compression ring (1) into groove of exhaust camshaft (2) (see arrow).

Oil plain rectangular compression ring (1) and rotate in direction of arrow until plain rectangular compression ring (1) is positioned on exhaust camshaft.