11 14 110 Removing and installing lower timing case cover (M52 / S52 / M52TU / M54)

Remove VANOS adjustment unit. 11 36 010 Removing And Installing Or Replacing Double Vanos Adjustment Unit .

Remove coolant thermostat. See Thermostat .

Remove alternator drive belt  and drive belt tensioner.

Brace pulley for water pump with drive belt and unfasten screws.

Fig 1: Removing Pulley For Water Pump

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M52 / S52 only 

Unfasten engine speed sensor.

Fig 2: Unfastening Engine Speed Sensor

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Remove vibration damper. See 11 23 010 Removing And Installing Or Replacing Vibration Damper .

Version where vibration damper and hub are two parts: Remove hub for vibration damper.

Remove Oil Sump .

Drive out dowel pins from timing case cover towards rear.

(Mandrel diameter less than 5 mm)

Fig 3: Driving Out Dowel Pins From Timing Case Cover Towards Rear

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Unscrew timing case cover to cylinder head bolts.

Fig 4: Unscrewing Timing Case Cover To Cylinder Head Bolts

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Unfasten screws and remove timing case cover.

Fig 5: Removing Timing Case Cover

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Installation: 

Clean sealing surfaces.

Drive alignment pins into timing case cover until they protrude approx. 2 to 3 mm.

Fig 6: Driving Alignment Pins Into Timing Case Cover

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Installation: 

Secure new seals to timing case cover with a little grease.

Fig 7: Securing Seals To Timing Case Cover With A Little Grease

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Installation: 

Sealing faces clean and free of seal debris.

Apply Drei Bond 1209 sealing compound at following points:

• A bead at the transitions to the cylinder head gasket on the left and right.
• Thinly and evenly to the entire sealing face of the timing case cover to the cylinder head gasket.
  Fig 8: Locating Area For Applying Sealing Compound

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Installation: 

Install timing case cover, insert all screws and initially tighten to approx. 5 Nm.

Fig 9: Installing Timing Case Cover

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Installation: 

Drive in dowel pins from front until flush.

Fig 10: Driving In Dowel Pins

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Installation: 

Fully tighten all screws in alternate sequence.

Tightening torque, see 11 14 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 11: Tightening Timing Case Cover Screws

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Insert screws, tighten screw connection for timing case cover to cylinder head.

Fig 12: Tightening Screw Connection For Timing Case Cover To Cylinder Head

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Replace radial seal in lower timing case cover.

Assemble engine.