Crankcase Halves, Engine M96/20, M96/21, M96/22

Disassembly and Assembly of Crankcase Halves, Engine M96/20, M96/21, M96/22







Crankcase Halves, Engine M96/20, M96/21, M96/22


Mounting Instructions

NOTE: The black sealant "Loctite 5900" or "Drei Bond Type 1209" are used for sealing the crankcase halves. The separation of the crankcase halves is made rather more difficult if Loctite 5900 is used.

1. Undo ring-edge bolt. Unscrew the 25 hexagon-head bolts for this purpose.





2. Undo the third fastening point -(arrow)- on the crankcase half cylinder bank 4 - 6 from the engine holder.

3. Use a slotted screwdriver with a tip which is 14 mm wide and 250 mm long to separate the crankcase halves.







Separate the crankcase half

4. Insert the screwdriver in the lugs of the crankcase halves and separate the crankcase halves by tapping gently. Alternate the sides during separation.




Lug point on the crankcase

NOTE: Clean the crankcase halves using a nylon brush.

5. Clean the crankcase halves and then remove any residual sealant with a nylon brush.


Assembling the Crankcase Halves





NOTE:
- Only "Drei Bond Silicon Type 1209 "and "Loctite 5900" should be used for surface sealing.
- After application of surface seals (silicone bead), screw together within five minutes.
- Observe the expiry date of the surface seal.





1. At the processing nozzle, cut off the first metering step at an angle.

NOTE:
- Do not process the sealant too generously.
- No sealant should be pressed into the crankcase when screwing.





2. Apply a uniform bead of silicone approximately 1.5 mm wide to the cleaned sealing surface of the crankcase half of cylinder bank 4 to 6. The silicone bead should be applied as shown in the following illustration.

3. Position the crankcase halves carefully and evenly. The sealant bead must not be damaged during this procedure.




View from the oil pan side




View from the starter side




View from the belt pulley side




View from the flywheel side

4. Screw the crankcase into place. Mount the crankcase with new screws. The tightening torque is 13 Nm (9.5 ftlb.). Observe the tightening sequence.





5. After tightening the crankcase halves, fasten the third fastening point between the crankcase half (cylinders 4 - 6) and special tool engine holder 9589.




Tightening Torques