11 41 000 Removing and installing/replacing oil pump (N63O1)

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Special tools required:

IMPORTANT: All adjusting procedures on the chain drive must be observed.
A timing chain which is tensioned too tautly can cause interference noise in the chain drive.
A timing chain that is too slack can cause the timing chain to jump.
Risk of damage in oil pump drive.

Necessary preliminary tasks:

DRAIN ENGINE OIL .
REMOVE lower oil sump section.

Unscrew nuts (2).

Tightening torque: 11 41 1 AZ .

Remove intake pipe (1).

Installation note:

Replace O-ring.

Fig 1: Identifying Oil Intake Pipe And Screws

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Release all nuts (1) using special tool 11 7 201.

TIGHTENING TORQUE 11 41 5 AZ .

Remove oil pump drive gear.

NOTE: Illustration shows engine removed

Fig 2: Removing/Installing Oil Pump Drive Gear

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Unscrew nuts (1).

Release screws, remove oil pump (1) with aid of a second person.

Installation note:

Replace screws.

TIGHTENING TORQUE 11 41 2AZ .

NOTE: Illustration without top oil sump

Fig 3: Identifying Oil Pump Screws/Nuts

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Pull off engine oil line (1) upwards in direction of arrow.

NOTE: Illustration without top oil sump

Fig 4: Removing/Installing Engine Oil Pipe

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Installation note:

Replace sealing rings (1).

Lightly oil sealing ring 1 (1).

Coat engine oil pipe (2) with suitable lubricant.

Fig 5: Identifying Oil Pipe Sealing Ring

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Installation note:

Replace O-ring (1) for oil feed line.

Fig 6: Identifying Oil Feed Line O-Ring

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Fit engine oil pipe (1) in direction of arrow.

Fig 7: Removing/Installing Engine Oil Pipe

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Installation note:

When the oil pump is renewed, the oil deflector (2) must be remounted.

Release screws (1).

Tightening torque: 11 41 6 AZ .

Fig 8: Identifying Oil Deflector Screws

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Fit special tool 11 8 920 on special tool 11 9 280 .

Fig 9: Fitting Special Tool 11 8 920 Onto 11 9 280

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IMPORTANT: Left-hand thread on oil pump screw connection.
Do not grip oil pump drive with a pair of pliers risk of damage .

Fig 10: Identifying Oil Pump Screw Connection

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IMPORTANT: Nut (1) has left-hand thread.

Position special tool 11 8 920 on sprocket.

Slacken nut (1).

Fig 11: Positioning Special Tool 11 8 920 Onto Sprocket

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Installation note:

Check mounting flats on pump shaft (1) for damage.

Fig 12: Locating Pump Shaft Mounting Flats

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IMPORTANT: Nut (1) has left-hand thread.

Grip pump with assistance of a second person.

Secure nut (1) with special tool 00 9 120 .

Tightening torque: 11 41 4

Fig 13: Securing Nut Using Special Tool 00 9 120

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Join and secure nuts (1).

Tightening torque 11 41 2 AZ .

NOTE: Illustration without top oil sump

Fig 14: Identifying Oil Pump Screws/Nuts

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Install oil pump drive gear.

Secure all nuts (1) with special tool 11 7 201.

TIGHTENING TORQUE 11 41 5 AZ .

Fig 15: Removing/Installing Oil Pump Drive Gear

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Adjust oil pump timing chain.

Pretension oil pump adjusting sleeve (1) with a hexagon socket wrench.

Adjustment value 10 mm +2 .

NOTE: Illustration without top oil sump

Fig 16: Identifying Oil Pump Adjusting Sleeve

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Procedure on removed engine:

Upper oil sump has been removed.

Minimally preload timing chain (1) with special tool 51 0 342 .

Read off measured value A on special tool 51 0 342 and note down.

IMPORTANT: Do not use force to preload timing chain (1).

Fig 17: Measuring Preload Timing Chain Value

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Using a screwdriver (1), preload timing chain to minimal extent in direction of arrow.

Read off measured value B on special tool 51 0 342 and note down.

IMPORTANT: Do not use force preload timing chain.

Fig 18: Measuring Preload Timing Chain Adjustment Value

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Measured value A minus measured value B results in the adjustment value.

Adjustment value 10 mm +2.

Procedure on installed engine:

Upper oil sump has been installed.

Position drag pointer (1) of special tool 2 213 485 on oil pump chain.

Fig 19: Identifying Drag Pointer

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Installation note:

Attachment point (1) N63O0/N63O1/S63.

Attachment point (2) N74.

Fig 20: Identifying Drag Pointer Attachment Points

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IMPORTANT: Do not use force preload timing chain.

Push drag pointer (1) to the left and right until value has been determined.

Adjustment value 10 mm +2 .

Fig 21: Pushing Drag Pointer To Left And Right To Determine Value

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Adjust oil pump timing chain.

Pretension oil pump adjusting sleeve (1) with a hexagon socket wrench.

Adjustment value 10 mm +2 .

NOTE: Illustration without top oil sump

Fig 22: Identifying Oil Pump Adjusting Sleeve

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Join and secure screw (2).

Tightening torque 11 41 2 AZ .

NOTE: Illustration without top oil sump

Fig 23: Identifying Oil Pump Screws/Nuts

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Assemble engine.