Removing Oil Guide Housing

Information 

• The description only applies when installed. 
• If the oil guide housing is removed when the transmission is disconnected, the oil guide housing must be aligned with the aid of a dial gauge (see section on Aligning oil guide housing with a dial gauge). 
• To remove the oil guide housing, it is not necessary to remove the timing case cover. If the timing case cover is removed while carrying out work later, the oil guide housing must also be removed. 

1. Remove cross shaft/engine carrier -1-  .

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   Removing cross shaft/engine carrier

   Unscrew and remove fastening screws -arrows-  .

   Remove cross shaft/engine carrier -1-  .

2. Remove cross shaft cover -1-  on both sides.

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   Cross shaft cover

   Unscrew and remove fastening screws -arrows-  on both sides.

   Remove one cross shaft cover -1-  .

   The second cross shaft cover will be removed with the cross shaft pipe -1-  .

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   Cross shaft pipe with cover

   It does not matter whether the cross shaft pipe -1-  is removed with the left or right cover.

   Remove housing sealant -2-  under both cross shaft covers.

3. Unclip coolant hoses from the clip on the oil/water heat exchanger -8-  .
   Fig 1: Coolant Return On Turbo Engine Components Location

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   Coolant return on turbo engine

   1	Connection piece on generator
   2	Connection piece screw
   3	Screw, M6 x 20
   4	Coolant return line
   5	Coolant return hose assembly
   6	Holder
   7	M6 screw - aluminum screw;  always use new aluminum screws and
   8	Clip

4. Remove the four top screws between the timing-case cover and oil guide housing -arrows-  .

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   Screws between timing-case cover and oil guide housing

5. Remove sensor for oil pressure indicator

   > 170419 REMOVING AND INSTALLING OIL-PRESSURE SENDER  - section on "Removing"

6. Unscrew and remove fastening screw between the timing-case cover and oil glide housing underneath the oil pressure sensor.
7. Disconnect coolant supply line to the oil/water heat exchanger.

   To do this, clamp the coolant hoses for the oil/water heat exchanger with hose clamps. For example, use > 3093 - hose clamp  or > 3094 - hose clamp  .

   Pull the coolant hoses off the oil/water heat exchanger. Coolant will run out.

8. Drain engine oil. For details, see

   > 170117 DRAINING AND FILLING ENGINE OIL (CHANGING ENGINE OIL) 

9. Remove the two side oil extraction lines on the turbo engine -5-  and (bottom illustration) -5-  from the oil guide housing.
   Fig 2: Oil Circuit For Turbocharger, Cylinders 1 To 4 Components Location

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   Oil circuit for turbocharger, cylinders 1 to 4

   1	Vent line for turbocharger, cylinders 1 to 4; vent line to oil extraction line for turbocharger and holding clamp for vent line to collection pipe
   2	Turbocharger oil feed line for cylinders 1 to 4; turbocharger oil feed line at connection piece; turbocharger oil feed line at cylinder head
   3	Holder
   4	Seal
   5	Oil extraction line
   6	Screw, M6 x 12; oil extraction line for turbocharger to oil guide housing and oil feed line for turbocharger at the holder
   7	Screw, M6 x 16

   Fig 3: Oil Circuit For Turbocharger, Cylinders 5 To 8 Components Location

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   Oil circuit for turbocharger, cylinders 5 to 8

   1	Oil feed line for turbocharger, cylinders 5 to 8; oil feed line for turbocharger to connection piece; oil feed line for turbocharger to cylinder head
   2	Vent line for turbocharger, cylinders 5 to 8; vent line to oil extraction line for turbocharger
   3	M6 screw; oil extraction line for turbocharger to oil guide housing and holding clamp
   4	Holding clamp
   5	Oil extraction line
   6	Screw, M6 x 16
   7	Seal

10. Remove oil level sensor. To do this, pull off the connector and release the cable >.

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    Oil level sensor

11. Remove screws -arrows-  . Remove oil level sensor by turning it. Oil will start to drip.

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    Screws on oil level sensor

12. Remove oil pressure control valve

    > 172619 REMOVING AND INSTALLING OIL PRESSURE CONTROL VALVE  - section on "Removing"

13. Remove oil pan.
14. Remove the bottom two screws between the transmission and oil guide housing >.

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    Screws between oil guide housing and transmission

15. After removing the oil guide housing, the connecting tubes (oil lines and oil pipes) between the oil pump and oil guide housing must be removed.

    Do not forget the side oil suction pipes on the turbo engine. See illustrations.

    Fig 4: Oil Lines On Turbo Engine Components Location

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    Oil lines on turbo engine

    1	Suction pipe between oil pump and turbocharger (fitted in oil guide housing)
    2	Suction pipe between oil pump and turbocharger (fitted in oil guide housing)
    3	Intake pipe on oil pump
    4	Sealing ring
    5	Oil pressure pipe
    6	Sealing ring
    7	Sealing ring; oil before fitting
    8	Oil regulating line
    9	Sealing ring
    10	Sealing ring; oil before fitting
    11	Oil pipes to oil pump and oil guide housing
    12	Oil pipes to oil pump and oil guide housing

    Fig 5: Oil Lines On Turbo Engine Components Location

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    Oil lines on turbo engine, view with oil pan removed

    1	Mounting for oil pressure pipe
    2	Mounting for oil extraction line for turbocharger, cylinders 5 to 8
    3	Mounting for oil extraction line for turbocharger, cylinders 1 to 4
    4	Mounting for auxiliary sump intake pipe
    5	Mounting for oil pump intake pipe
    6	Mounting for oil regulating line

    Fig 6: Oil Lines On Naturally Aspirated Engine Components Location

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    Oil lines on naturally aspirated engine

    1	Oil pump intake pipe; screw M6 x 20
    2	Sealing ring
    3	Oil pressure pipe; screw M6 x 16
    4	Sealing ring
    5	Sealing ring; oil before Atting
    6	Oil regulating line; screw M6 x 16
    7	Sealing ring
    8	Sealing ring; oil before fitting
    9	Oil pipes to oil pump and oil guide housing
    10	Oil pipes to oil pump and oil guide housing

    Fig 7: Oil Lines On Naturally Aspirated Engine Components Location

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    Oil lines on naturally aspirated engine, view with oil pan removed

    1	Mounting for oil pressure pipe
    2	Mounting for auxiliary sump intake pipe
    3	Mounting for oil pump intake pipe
    4	Mounting for oil regulating line

16. Loosen oil guide housing. To do this, unscrew and remove screws -7-  and -4-  on the lower part of the crankcase.
    Fig 8: Oil Guide Housing With Accessories Components Location (2WD)

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    Oil guide housing with accessories (example for 2WD)

    1	Screw, M6 x 20
    2	Joint flange
    3	Sealing ring
    4	Oil guide housing to lower part of crankcase -> see Overview of threaded joints for oil guide housing.
    5	Oil level sensor
    6	Oil level sensor to oil guide housing (steel screw)
    7	Timing-case cover to oil guide housing -> see Overview of threaded joints for oil guide housing.

17. Remove bonding (sealant) between the oil guide housing and crankcase.

    Carefully prise off the cast lugs using a screwdriver or a soft rubber hammer if necessary.

18. Guide the oil guide housing carefully around the oil pump and remove it.
19. Remove sealing ring for lower part of crankcase.
20. Clean sealing faces. Brush off remaining sealant with a plastic brush and then degrease the sealing face.