Group 10, Crankcase

1. Upper part of crankcase
2. Lid
3. Sealing ring
4. Screw plug for upper part of crankcase → Tightening torque: 30 Nm (22 ftlb.)  and → Torque angle: 60° 
5. Dowel sleeve
6. Oil spray jet
7. Screw, M6 x 16 → Tightening torque: 10 Nm (7.5 ftlb.) 

1. Direction of travel
Fig 1: Crankcase Screw Tightening Sequence
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1. Lower part of crankcase
2. Straight pin, 6 x 18
3. Sealing ring
4. Sealant application - Doboseal 224N (999.915.573.43, status 09/08)
5. Thrust-bearing screw M11; tighten screws within 5 minutes; observe tightening sequence. → Initial tightening: 30 Nm (22 ftlb.) → Torque angle: 90° 
6. Thrust-bearing screw M10; tighten screws within 5 minutes; observe tightening sequence. → Initial tightening: 22 Nm (16 ftlb.) → Torque angle: 60° 
7. Aluminum screw  , M8 x 70; (cross bolt connection); always use new aluminum screws; → Initial tightening: 10 Nm (7.5 ftlb.)  and → Final tightening: 90° 
8. Screw, M8 x 35 → Tightening torque: 23 Nm (17 ftlb.) 
9. Screw, M8 x 50 → Tightening torque: 23 Nm (17 ftlb.) 
10. Dowel sleeve

1. Direction of travel
Fig 2: Crankcase Lower Part Screws Tightening Sequence (V8 2WD)
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1. Wipe off sealant residue after fitting

1. Direction of travel
Fig 3: Applying Sealant On Engine Block Gasket
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1 to 20  - Tightening sequence for M11 and M10 screws => Observe different torques!

1. Direction of travel
Fig 4: Thrust-Bearing Screws Tightening Sequence
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Fig 5: Crankcase Lower Part To Upper Part Screws Tightening Sequence

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1. Bracket for auxiliary units/engine mounting
2. Screw, M10 x 45 → Tightening torque: 65 Nm (48 ftlb.) 
3. Hydraulic mount, left
4. Engine carrier
5. Screw, M10 x 65 → Tightening torque: 60 Nm (44 ftlb.) 
6. Dowel sleeve
7. Nut, M12 x 1.5 → Tightening torque: 75 Nm (56 ftlb.) 

Fig 6: Identifying Auxiliary Units And Engine Mounting Right Bracket

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1. Engine carrier, cylinders 1 to 4
2. Screw, M10 x 45 → Tightening torque: 65 Nm (48 ftlb.) 
3. Hydraulic mount, right
4. Engine carrier
5. Screw, M10 x 65 → Tightening torque: 60 Nm (44 ftlb.) 
6. Nut, M12 x 1.5 → Tightening torque: 75 Nm (56 ftlb.) 
7. Bores for screws, M10 x 45

1. Installation view of engine carrier on crankcase
Fig 7: Identifying Auxiliary Units And Engine Mounting Left Bracket
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1. Engine ventilation/oil mist separator
2. Molded seal
3. Molded seal
4. Screw elements, M6 → Tightening torque: 10 Nm (7.5 ftlb.) 
Fig 8: Identifying Oil Mist Separator Components
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1. Engine ventilation line
2. Line for oil mist separator to intake-air distributor
3. Tank ventilation
4. Aluminum holder
5. Aluminum screw (holder); see FigureTiming-case cover
Fig 9: Identifying Engine Ventilation Line, Tank Ventilation And Aluminum Holder
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1. Engine ventilation line
2. Full-throttle ventilation check valve with lines secured; one-way coupling for turbocharger intake manifold
3. Tank ventilation
4. Aluminum holder
5. Aluminum screw (holder); see FigureTiming-case cover
6. Belt tensioner
7. Holder
8. Fastening screw; see FigureBelt drive
Fig 10: Identifying Turbo Engines Ventilation
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1. Ventilation pipe with sealing ring (holder to timing-case cover) → Initial tightening: 4 Nm (3 ftlb.)  and → Final tightening: 90° 
2. Screw, M6 x 12 → Tightening torque: 10 Nm (7.5 ftlb.) 

1. Installation view of ventilation pipe
Fig 11: Identifying Positive Crankcase Ventilation Components - Turbo Engine
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1. Design cover for cylinder bank 1 to 4
2. Design cover for cylinder bank 5 to 8
3. Screw; design cover to bar ignition module → Tightening torque: 4.4 Nm (3.5 ftlb.) 
4. Mounting points (rubber ball elements)
Fig 12: Identifying Engine Cover
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