Note. Reassembly will require a new gasket and a new rubber seal. You will also need a thin metal plate for assembly (see text).
Withdrawal
1. Remove the camshaft drive chain, sprockets, tensioner shoe and chain guide as directed in paragraph 7.
2. Remove the chain tensioner as directed in paragraph 8.
3. Remove generator (see chapter 5A).
4. Remove the alternator support bracket.
5. Remove the oil filter housing. Get ready for an oil leak. Replace gasket and o-ring.
6. Remove the engine oil pan (see paragraph 13).
7. Turn out bolts of fastening of the case of a chain and remove the case of a chain from the block of cylinders. Prepare a new gasket.
Installation
8. Thoroughly clean the mating surfaces of the chain case, cylinder block and block head.
9. Check that the chain case dowel pins are intact and in place on the bottom of the cylinder block.
10. Apply a coat of sealant to the surfaces of the chain housing where it contacts the cylinder head and chain covers. Insert a new rubber seal into the groove on the top edge of the chain housing (pic. 9.10).
11. Install a new gasket on the pins in the cylinder block.
12. To prevent the rubber seal from moving when the chain housing is installed, BMW recommends tool 11 2 330. The tool can be replaced with a thin metal plate, the size of which allows covering the entire surface on which the seal is located.
13. Lightly grease the top surface of the seal and both sides of the plate with grease. Place the plate on the seal.
14. Replace the chain case by aligning the dowel pins with the appropriate holes. Screw in the bolts and tighten them to the required torque (pic. 9.14).
15. Gently pull the plate out of the connection between the chain housing and the cylinder head.
16. Reinstall the oil pan (see paragraph 13).
17. Install the oil filter housing with a new gasket and O-ring.
18. Install the generator support bracket, then install the generator (for details, please contact chapter 5A).
19. Reinstall the tensioner assembly as directed in paragraph 8.
20. Install the chain guide, tensioner shoe and chain as indicated in paragraph 7.