Oil Pump Chain Tensioner, Checking and Oil Pump, Removing

Special tools and equipment
- Hand drill with plastic brush
- Silicone sealant D 176 404 A2
- Flat scraper

Removing





- Remove noise insulation (arrows).
- Drain engine oil.





- Remove oil pan lower part (arrows).

Checking chain tensioner





- Insert a screwdriver between chain and chain tensioner and pry carefully against chain tensioner, in direction of arrow.
- If there is no spring tension or drive chain is slack, chain tensioner is malfunctioning and must be replaced.

Note: To replace the chain tensioner, the toothed belt and then the front sealing flange must be removed => Page 13-10 Removing toothed belt.

Removing oil pump





- Remove both brackets (arrows) for oil supply pipe.
- Pull longer oil supply pipe out of oil pan upper part.





- Unbolt chain sprocket from oil pump (arrow) and pull down off oil pump drive shaft.





- Remove oil pump together with shorter oil supply pipe.

Installing
Installation is carried out in the reverse order, when doing this note the following:
- Insert shorter oil supply pipe with new O-ring in oil pump, then install oil pump.

Note: The sealing surfaces on the oil pan upper and lower parts must be free of oil and grease.

For oil pans with solid gasket:
- Position a new gasket on oil pan lower part and secure with 4 bolts.
- Tighten all oil pan securing bolts hand tight, then tighten to prescribed torque starting at middle and work outward.
For oil pans with silicon gasket:





- Remove residual sealant from oil pan, if necessary, with a hand drill and plastic brush (wear eye protection) instead of a flat scraper.
- Clean sealing surface free of oil and grease.

Note:
- Note the use by date of the sealant.
- The oil pan must be installed within 5 minutes of applying silicone sealing compound.





- Cut-off tube nozzle at forward marking (nozzle approximately 3 mm dia.).
- Apply silicone sealing compound, as shown, to clean oil pan sealing surface. Sealing compound bead must be:
- 2 - 3 mm thick
- and run on inside of bolt holes -arrows

Note: The sealing compound bead must not be thicker, otherwise excess sealing compound will enter the oil pan and may block the oil suction pipe strainer.





- Apply silicone sealant bead as shown to clean sealing surface of oil pan.
- Install oil pan immediately and tighten all bolts lightly.
- Tighten oil pan bolts to 15 Nm.

Note: After installing oil pan the sealant must be allowed to dry for approximately 30 minutes before engine is filled with oil.
The rest of the assembly is basically a reverse of the disassembly sequence.