A8 Quattro Sedan V8-4.2L (AUX) (2001)
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Check axial play
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Removing and installing.
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Check radial clearance using Plastigage (lever removed):
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Wear limit: 0.1 mm (0.0039 inch)
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Maximum runout: 0.01 mm (0.0004 inch)
5. Intake camshaft bearing cap
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Note installation position and numbering
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Observe dowel pin.
6. Exhaust camshaft bearing cap
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Observe dowel pin.
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Note installation position and numbering
7. 10 Nm (7 ft. lbs.)
8. Double bearing cap
9. Cap
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Always replace
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To remove: remove bearing cap.
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With cap installed, lightly drive in with 3202
10. Bearing cap
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Before installing, lightly coat with sealer AMV 188 02, Refer to Fig. 2
CAUTION! Part numbers are listed for reference only. Always check with your Parts department for latest information.
11. Valve roller lever for exhaust camshaft
12. Drive chain
13. Valve roller lever for intake camshaft
14. Intake camshaft
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Check axial play
^
Removing and installing
^
Check radial clearance using Plastigage (lever removed):
^
Wear limit: 0.1 mm (0.0039 inch)
^
Maximum run-out: 0.01 mm (0.0004 inch)
15. 10 Nm (7 ft. lbs.)
16. Mechanical camshaft adjuster
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With valve for camshaft adjustment -N205
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Before removing, secure with 3366 bracket tensioner
17. Rubber/metal
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seal
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Always replace.
18. Valve keepers
19. Valve spring plate
20. Valve spring
21. Valve stem seal
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Replacing.
22. Seal
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Always replace.
23. Cylinder head
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See note.
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Valve guides, checking.
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Valve seats, reworking.
24. Exhaust valve
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Do not rework, only lapping is permitted
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Valve dimensions, Refer to Fig. 1.
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Valve guides, checking, valve seats lapping.
25. Intake valve
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Do not rework, only lapping is permitted
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Valve dimensions, Fig. 3
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Valve guides, checking, valve seats lapping.
26. Seal
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For intake camshaft
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Removing and installing.
27 - 28 Rotor for Camshaft Position (CMP) sensor
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Note position
29. Washer
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Conical 30 - 23 Nm (17 ft. lbs.)
31. Camshaft Position (CMP) sensor
32. 5 Nm (44 inch lbs.) + 90°
