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 the bottom two screws between the transmission and oil guide housing.
   Fig 1: Locating Screws Between Oil Guide Housing And Transmission

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2. 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 Fig 2.
   Fig 2: Identifying Oil Lines On Turbo Engine (M48/51)

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   1. Oil extraction line for turbocharger, cylinders 1 to 4
   2. Oil extraction line for turbocharger, cylinders 5 to 8
   3. Intake pipe on oil pump
   4. O-ring
   5. Oil pressure pipe
   6. O-ring
   7. O-ring, 22 x 3
   8. Oil regulating line
   9. O-ring
   10. O-ring
   11. Screw, M6 x 16; oil pressure pipe to oil pump and oil guide housing; oil regulating line to oil pump and oil guide housing; turbocharger extraction line to oil pump
   12. Screw, M6 x 20
   1. For arrangement of oil lines, see other Fig 3
   2. Direction of travel
      Fig 3: Identifying Oil Lines On Naturally Aspirated Engine (M48/01)

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   1. Intake pipe on oil pump
   2. O-ring
   3. Oil pressure pipe
   4. O-ring
   5. O-ring
   6. Oil regulating line
   7. O-ring
   8. O-ring
   9. Screw, M6 x 16; oil pressure pipe to oil pump and oil guide housing; oil regulating line to oil pump and oil guide housing
   10. Screw, M6 x 20
   Fig 4: Identifying Oil Lines, Intake Pipe On Turbo Engine M48/51

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   1. 1 - Mounting for oil extraction line for turbocharger, cylinders 1 to 4
   2. 2 - Mounting for oil extraction line for turbocharger, cylinders 5 to 8
   3. 3 - Mounting for oil separator vent line, cylinders 5 to 8
   4. 4 - Mounting for oil pump intake pipe
   5. 6 - Mounting for oil pressure pipe
   6. 9 - Mounting for oil regulating line
   1. Direction of travel
      Fig 5: Identifying Oil Lines, Intake Pipe On Naturally Aspirated Engine M48/01

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   1. Mounting for oil pump intake pipe
   2. Mounting for oil separator vent line, cylinders 5 to 8
   3. Mounting for oil pressure pipe
   4. Mounting for oil regulating line
3. Loosen oil guide housing. To do this, unscrew the screws for the lower part of the crankcase. -6- 
   Fig 6: Identifying Oil Guide Housing With Accessories

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4. 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.
5. Guide the oil guide housing carefully around the oil pump and remove it.
6. Remove sealing ring for the lower part of the crankcase.
7. Clean sealing faces. Brush off remaining sealant with a plastic brush and then degrease the sealing face.