Double Vanos Timing; Chain Components; Double Vanos Timing Chain Components, Installing, M52 Tu And M54 Engines; Cylinder Head Removal And Installation (M62 Engine) - BMW 5251 Service Manual

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Cylinder Head Removal and Installation
Double VANOS Timing
Chain Components
1. Impulse wheel mounting nut
2. Exhaust camshaft impulse
wheel
3.
Spring plate, exhaust
4. Thrust spacer (T
=
3.5 mm)
5. Splined shaft
6.
Torx screw
7. Exhaust camshaft secondary
sprocket
8. Secondary timing chain
9. Splined sleeve
10. Primary sprocket
11. Threaded locating stud
12. Secondary chain tensioner
13. Secondary chain lower guide
14. Sprocket mounting nut
15. Spring plate, intake
16. Splined shaft
17. lntakecamshaft sprocket
18. Locating stud
19. Thrust spacer
20. Intake camshaft impulse wheel
Double VANOS timing chain components,
installing, M52 TU and M54 engines
-
4
Slide impulse wheel on intake camshaft, aligning boss with
raised portion on camshaft (arrow).