Removing oil pump

Information 

• The illustrations show the partly disassembled engine on the assembly support with oil pump facing upwards.
• The oil guide housing is removed.
• Adjustment operations on the balance shaft only work when the timing-case cover is fitted and the vibration balancer is connected.

Condition of component after removing the oil guide housing =>

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1. Remove oil pump drive.
   1. 1.1. Turn the crankshaft vibration balancer as required until you can fit an open-ended wrench (a/f 36) on the balance weight on the balance shaft. Remove screw (M8 x 35) on the drive gear wheel for the oil pump. → Drive sprocket for oil pump 

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   2. 1.2. Relieve the tensioning rail using a screwdriver (push it away) and remove the drive gear wheel for the oil pump.

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   3. 1.3. Loosen counter-weight on the balance shaft. Counter at the intervention point with an open-ended wrench (a/f 36) and remove screw (M10 x 45) and tension cone.

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      Information 

      Make sure that small parts and the feather key do not fall off.

   4. 1.4. Loosen the counter-weight using pliers. When doing so, ensure that the feather key does not fall into the crankcase (place a cloth over the timing-case cover).

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   5. 1.5. Remove the feather key from the counter-weight or balance shaft (depending on where the feather key is stuck) using pointed-nose pliers or a magnet.

      1	Counter-weight
      2	Feather key

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   1	Feather key
   2	Cloth over timing-case cover
   3	Pointed-nose pliers

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2. Loosen drive sprocket for balance shaft.

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3. Move the drive chain aside and remove the drive sprocket.

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4. Loosen guide rail fastening point on the oil pump. To do this, remove two M6 screws. The bottom M6 screw, which is hidden by the timing-case cover, remains fitted.

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5. Remove fastening screws -7-  and -8-  from the oil pump (different sizes).

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6. Lift up the oil pump and guide it out under the tensioning rail. Remove oil pump.