11 14 005 Replacing Front Crankshaft Seal (N55)

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Special Tools Required:

Necessary Preliminary Tasks:

Remove VIBRATION ABSORBER .

IMPORTANT: Do Not Release Central Bolt.
If The Central Bolt Is Released, The Sprockets of The Timing Chain and The Oil Pump Will No Longer Be Non-Positively Connected To The Crankshaft. Intake and Exhaust Camshafts Can Turn In Relation To Crankshaft.
Risk of Damage!

Fig 1: Identifying Central Bolt

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Screw Special Tool 11 0 371 To 80 Nm Into Crankshaft Seal.

Screw In Spindle 11 0 372 .

Release Crankshaft Seal From Housing.

Repeat The Operation Several Times If Necessary.

Fig 2: Screwing Special Tool 11 0 371 Into Crankshaft Seal and Screwing In Spindle

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Carefully Saw Open Crankshaft Seal (1) At Cutting Line (2).

Remove Crankshaft Seal (1) From Special Tool 11 0 371 .

Fig 3: Identifying Cutting Line On Crankshaft Seal

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IMPORTANT: The Following Text Describes Installation and Sealing Between The Engine Block and Crankshaft Seal.
The Engine Block Will Not Be Leak Proof At The Outside of The Crankshaft Seal If You Fail To Comply with the Individual Work Steps and The Work Sequence.

Installation Note:

Clean Sealing Surface (1) and Degrease Thoroughly In Area of Housing Partition.

Apply A Light Coat of Oil To Running Surface (2) of Crankshaft Seal.

Graphic Shows Engine N42.

Fig 4: Identifying Running Surface and Sealing Surface

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Push Radial Shaft Seal (1) Carefully In Direction of Arrow Onto The Special Tool 11 9 235 .

Fig 5: Pushing Radial Shaft Seal Onto Special Tool 11 9 235

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IMPORTANT: 11 9 235 Special Tool Can Only Be Fastened with 2 Opposite Bolts.
Determine Hole Pattern On Special Tool.

Screw Special Tool 11 9 235 with Special Tool 11 9 234 On Crankshaft.

Fig 6: Installing Special Tools On Crankshaft

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Align Groove (2) of Radial Shaft Seal (1) Centered To The Housing Partition (3.

IMPORTANT: After Installation, The Grooves Must Be Filled with Sealing Compound.

Fig 7: Aligning Groove of Radial Shaft Seal Centered To Housing Partition

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Draw In Radial Shaft Seal with Special Tool 11 9 231 In Conjunction with Special Tool 11 9 233 Until Flush.

Fig 8: Identifying Special Tools On Radial Shaft Seal

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Installation Note:

Use PRIMER 1.3 AND LIQUID SEALING 1.4 .

Prepare Liquid Sealing Compound (1) In Syringe (3).

Remove Sealing Caps (1) From Syringe (2).

Screw On Metering Needle.

Insert Piston for Pressing Out.

Syringe (2) Contains The Sealing Compound Loctite, Manufacturer's Number 128357.

Bottle (3) Contains The Primer Loctite, Manufacturer's Number 171000.

Fig 9: Identifying Sealing Caps, Loctite Primer, Sealing Compound, and Syringe

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Before Filling with Sealing Compound:

Moisten Brush with Loctite Primer, Manufacturer's Number 171000. Insert Brush As Far As Possible Into Grooves (1) On Crankshaft Seal In Order To Coat Housing Partition On Engine Block.

Graphic Shows Engine N42.

Fig 10: Inserting Brush Into Grooves On Crankshaft Seal

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Using Syringe (2), Fill Both Grooves (3) Flush with Loctite Sealing Compound, Manufacturer's Number 128357.

Graphic Shows Engine N42.

Fig 11: Filling Grooves Flush with Loctite Sealing Compound Using Syringe

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NOTE: Loctite Primer, Manufacturer's Number 171000, Binds The Loctite Sealing Compound, Manufacturer's Number 128357, and Prevents Leakage.

Coat Surface of Sealing Compound In Both Grooves (1) with Loctite Primer, Manufacturer's Number 171000.

Graphic Shows Engine N42.

Fig 12: Inserting Brush Into Grooves On Crankshaft Seal

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Assemble Engine.

Special Tools Required:

Necessary Preliminary Tasks:

Remove VIBRATION ABSORBER .

Fig 1: Identifying Central Bolt

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Screw Special Tool 11 0 371 To 80 Nm Into Crankshaft Seal.

Screw In Spindle 11 0 372 .

Release Crankshaft Seal From Housing.

Repeat The Operation Several Times If Necessary.

Fig 2: Screwing Special Tool 11 0 371 Into Crankshaft Seal and Screwing In Spindle

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Carefully Saw Open Crankshaft Seal (1) At Cutting Line (2).

Remove Crankshaft Seal (1) From Special Tool 11 0 371 .

Fig 3: Identifying Cutting Line On Crankshaft Seal

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Push Radial Shaft Seal (1) Carefully In Direction of Arrow Onto The Special Tool 11 9 235 .

Fig 4: Pushing Radial Shaft Seal Onto Special Tool 11 9 235

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Remove Support Ring (1).

Fig 5: Identifying Support Ring

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IMPORTANT: Special Tool 11 9 235 Can Only Be Fastened with 2 Opposite Bolts.
Determine Hole Pattern On Special Tool.

Fasten Special Tool 11 9 235 Onto Crankshaft By 2 Screws (1).

Fig 6: Attaching Special Tool 11 9 235 Onto Crankshaft By Screws

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Position Radial Shaft Seal (1) On Crankcase In Direction of Arrow Using Special Tool 11 9 235 .

Fig 7: Positioning Radial Shaft Seal On Crankcase

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Insert Radial Shaft Seal Flush Into Crankcase with Special Tool 11 9 231 and 2 303 795 .

Fig 8: Inserting Radial Shaft Seal Flush Into Crankcase Using Special Tools 11 9 231 and 2 303 795

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Assemble Engine.