11 31 032 Removing And Installing Or Replacing Left Inlet Camshafts (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 inlet camshafts, insert special tool 11 5 243 in direction of arrow in special tool 11 5 241.

Fig 1: Inserting Special Tool 11 5 243 In Special Tool 11 5 241

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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 (1) at hexagon head in direction of arrow.

Lock (2) must snap audibly into place.

Fig 2: Pretensioning Eccentric Shaft At Hexagon Head

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Release screws (1).

Tightening torque 11 31 4AZ. 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.

Installation:

Lubricate all bearing points with engine oil.

Fig 3: Identifying Screws

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Release screws along lines (1).

Tightening torque 11 31 4AZ. See CAMSHAFT .

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

Fig 4: Identifying Lines

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Release lock on special tool 11 5 241.

Relieve tension on eccentric shaft (1) at hexagon head in direction of arrow.

Inlet camshaft is pressed upwards by valve springs.

IMPORTANT: Inlet camshaft must lift off uniformly in upward direction.

Remove special tool 11 5 241.

Remove inlet camshaft.

Fig 5: Relieving Tension On Eccentric Shaft At Hexagon Head

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Insert inlet camshaft, cylinders 6-10.

Designation (E2) on Dihedron points upwards.

Cams (1) on 6th cylinder point downwards.

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. E 6= inlet side on 6th cylinder.

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

Fig 7: Identifying Designation (E6) 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 (1) at hexagon head in direction of arrow.

IMPORTANT: Inlet camshaft is pressed upwards by valve springs.

Lock 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

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