Timing Chains Assembly (M52 Tu And M54 Engines) - BMW 5251 Service Manual

11
7-50
/Camshaft Timing Chain
Timing chains assembly
(M52 TU and M54 engines)
1. Impulse wheel mounting nut
2. Camshaft impulse wheel (exh.)
3. Spring plate
4. Thrust spacer (T
=
3.5 mm)
5 .
Primary chain tensioner
6.
Torx screw
7. Exhaust secondary sprocket
8.
Splined shaft
9. Secondary timing chain
10. Splined sleeve
11. Primary sprocket
12. Threaded stud
13. Secondary chain tensioner
14. Sprocket mounting nut
15. Spring plate
16. Splined shaft
17. Intake camshaft sprocket
18.
Secondary chain lower guide
19. Thrust spacer
20. Camshaft impulse wheel
(intake)
21. Chain tensioner rail
22. Crankshaft sprocket
23. Threaded stud
24. Primary chain
25. Threaded stud
26. Guide rail
27. Threaded stud
28. Woodruff key