To Fit

(Power train removed)

Fig 1: Illustration For Steps 3-4

1. Thoroughly remove all remains of sealant on all surfaces. Wash clean with benzine.
2. Apply a bead of flange sealant, part no. 93 21 795, approx. 1 mm wide on the center of the sealing surfaces.
3. Fit the timing cover.

   Tightening torque: 22 N.m (16.2 lbf ft) 

4. Fit the bolt for the support bearing bracket in the timing cover and fit the generator and belt tensioner.
5. Check the condition of the water pump O-rings and replace them if necessary. Lubricate the O-rings with acid-free petroleum jelly and fit the water pump.
   Fig 2: Illustration For Step 5

   
6. Fit the crankshaft belt pulley. Use the flywheel locking attachment, part no. 83 94 868.
   Fig 3: Illustration For Step 6

   

   Tightening torque: 175 N.m (129.5 lbf ft) 

7. Make sure that there are no impurities or other foreign matter in the oil sump and clean its sealing surface.
   Fig 4: Illustration For Steps 8-9

   
8. Apply an even bead of flange sealant, part no. 93 21 795, to the sealing surface of the oil sump and fit the oil sump.

   Tightening torque: 22 N.m (16.2 lbf ft) 

9. Fit the protective plate.
10. Rotate the crankshaft 45 ° and fit the cylinder head with a new gasket. Make sure it is correctly seated on the guide sleeves and that the chain runs freely.
    Fig 5: Illustration For Step 11

    
11. Fit and tighten the cylinder head bolts.

    The tightening sequence is shown in the illustration.

    Tighten in three stages: 

    1. Step I: 40 N.m (29.5 lbf ft) 
    2. Step II: 60 N.m (44.3 lbf ft) 
    3. Step III: Tighten a further 90 ° 
12. Fit the two bolts between the timing cover and cylinder head.
    Fig 6: Illustration For Steps 12-13

    

    Tightening torque: 24 N.m (17.7 lbf ft) 

13. Make sure the camshafts are aligned with their setting marks and rotate the crankshaft back to its 0-marking.
14. Fit the camshaft sprockets and chain. Start with the intake camshaft.
    NOTE: Do not tighten the bolts!
15. Prepare the chain tensioner for mounting by pressing down the catch and pressing in the chain tensioner.
    Fig 7: Illustration For Steps 15-16-17

    
16. Fit the chain tensioner with a 27 mm socket.

    Tightening torque: 63 N.m (47 lbf ft) 

17. Fit the chain tensioner plug with push rod and spring.

    Tightening torque: 22.5 N.m (16.6 lbf ft) 

18. Make sure the chain is positioned correctly on the chain guards. Turn the crankshaft two revolutions and check the setting of the flywheel and camshafts.
19. Tighten the camshaft sprocket bolts.

    Tightening torque: 63 N.m (47 lbf ft) 

20. Clean the sealing surface of the camshaft cover with benzine.
    Fig 8: Illustration For Steps 21-22-23-24-25

    
21. Apply soap to the opening in the camshaft cover and fit the cover, starting at the opening. Then, tighten the bolt located furthest to the front at the timing chain end. Continue all the way round the outside and inside.

    Tightening torque: 15 N.m (11 lbf ft) 

22. Fit the spark plugs.

    Tightening torque: 28 N.m (20.7 lbf ft) 

23. Fit the ignition discharge module (turbo) or, alternatively, the ignition cables and cover (B204i).

    Tightening torques: 

    Ignition discharge module: 11 N.m (8 lbf ft) 

    Cover: 4 N.m (3 lbf ft) 

24. Connect the ignition discharge module electrical connection (turbo) and the crankcase ventilation and vacuum hoses.
25. Screw on the bolts on the thermostat housing cover and connect the hose for the throttle body preheating.
26. Fit and tighten the lock nuts on the turbocharger.
    Fig 9: Illustration For Steps 26-27-28

    

    Tightening torque: 25 N.m (18.5 lbf ft) 

27. Tighten the bolts on the turbocharger stay. Start with the one in the cylinder block. Fit the water pipe to the thermostat housing (turbo).

    Tightening torques: 

    Turbo, stay to block: 22 N.m (16.2 lbf ft) 

    Water pipe: 25 N.m (18.5 lbf ft) 

28. Fit the crankcase ventilation pipe together with the intake manifold (turbo).

    Tightening torques: 

    Turbo/intake manifold: 8 N.m (5.9 lbf ft) 

    Crankcase ventilation pipe: 24 N.m (17.7 lbf ft) 

    Pipe clamp: 9.5 N.m (7 lbf ft) 

29. Tighten the bolts on the intake manifold stay, starting with the one in the cylinder block and fit the oil filler pipe.
    Fig 10: Illustration For Steps 29-30

    

    Tightening torques: 

    Intake manifold, stay to block: 24 N.m (17.7 lbf ft) 

    Upper mounting: 10 N.m (7.4 lbf ft) 

    Lower mounting: 22 N.m (16 lbf ft) 

30. Make sure the oil plug is tight and connect the cables to the engine oil pressure sensor, generator and starter motor.