11 31 036 Removing And Installing / Replacing Left Exhaust Camshaft (S85)

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Special tools required:

11 5 241
11 5 242
11 5 243

Necessary preliminary tasks:

IMPORTANT: Use only special tool 11 5 241 to remove and install camshafts.

To remove and install the exhaust camshafts, special tool 11 5 243 is not required and must be removed from special tool 11 5 241.

Fig 1: Identifying Special Tool 11 5 241, 11 5 242 And 11 5 243

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Secure special tool 11 5 241 to cylinder head on left with special tool 11 5 242.

IMPORTANT: Screw in special tool 11 5 242 to max. 30 Nm.

Pretension eccentric shaft (2) at hexagon head in direction of arrow.

Lock (1) must snap audibly into place.

Fig 2: Pretensioning Eccentric Shaft At Hexagon Head

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Release screws (1).

Tightening torque: 11 31 7AZ. See CAMSHAFT .

E Inlet camshaft.

A Exhaust camshaft.

IMPORTANT: Risk of mix-up with cylinder bank 1-5.
Arrow (2) must point in direction of travel to chain drive.

Remove bearing caps.

Fig 3: Identifying Screws

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Installation:

Lubricate all bearing points with engine oil.

Release screws along lines (1).

Tightening torque 11 31 4AZ. See CAMSHAFT .

Installation:

Lubricate all bearing points with engine oil.

NOTE: Illustration does not show special tool 11 5 241.

Fig 4: Identifying Lines

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Release lock (1) on special tool 11 5 241.

Relieve tension on eccentric shaft at hexagon head in direction of arrow.

IMPORTANT: Inlet camshaft is pressed upwards by valve springs.
Exhaust camshaft must lift off uniformly in upward direction.

Fig 5: Relieving Tension On Eccentric Shaft At Hexagon Head

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Insert exhaust camshaft, cylinders 6-10.

Designation (A 2) on dihedron points upwards.

Cams (1) on 6th cylinder point upwards.

Installation:

Lubricate all bearing points with engine oil.

Fig 6: Identifying Cams

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Installation:

All bearing shells are assigned to one cylinder.

E and A from (1 to 10), e.g. A 6= exhaust side on 6th cylinder.

Arrow (1) must point in direction of travel to chain drive.

Fig 7: Identifying Designation (A6) On Dihedron

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Installation:

Arrangement of bearing shells, cylinders 6 to 10.

IMPORTANT: Mixing them up will result in increased wear - risk of damage!

Fig 8: Installing Bearing Shells

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Mount special tool 11 5 241 with special tool 11 5 242.

Pretension eccentric shaft at hexagon head in direction of arrow.

IMPORTANT: Exhaust camshaft is pressed upwards by valve springs.

Lock (1) must snap audibly into place.

Install all bearing caps by numbers.

Tightening torque 11 31 4AZ.. See CAMSHAFT .

Adjust valve timing.

Assemble engine.

Fig 9: Pretensioning Eccentric Shaft At Hexagon Head

Courtesy of BMW OF NORTH AMERICA, INC.