Timing Cover: Service and Repair

If necessary, remove VANOS adjustment unit, refer to Camshafts Lifters and Pushrods, Camshaft, Engine.
Remove coolant thermostat, refer to Cooling System.
Remove alternator drive belt tensioner, refer to Drive Belts, Mounts, Brackets and Accessories, Drive Belt Tensioner.





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





Unfasten engine speed sensor.
Remove hub for vibration damper, refer to Cylinder Block Assembly, Harmonic Balancer.
Remove oil sump, refer to Engine Lubrication, Oil Pan.





Drive out dowel pins on timing case cover towards rear of vehicle (diameter of punch less than 5 mm)





Unscrew timing case cover to cylinder head bolts.





Unfasten screws and remove timing case cover.

Caution: Check cylinder head gasket for damage; if necessary, remove cylinder head and replace cylinder head gasket.





Installation: Clean sealing surfaces. Drive dowel pins into timing case cover in such a way that they protrude by about 2 to 3 mm.





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





Installation: Apply Drei Bond 1209 sealing compound to the following areas:
- 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.





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





Installation: Drive in dowel pins flush from front end.





Installation: Fully tighten all screws in alternate sequence. Tightening Torque, refer to Engine Specifications.

Caution: If all screws are tightened, they must be tightened again in a second operation.





Insert screws, tighten screw connection for timing case cover to cylinder head.
Replace radial seal in timing case cover at bottom, refer to Cylinder Block Assembly, Front Crankshaft Seal.
Assemble engine.