Part I Audi A4 B6

Note. The following list refers to items in see scheme 281.

1. 10 Nm
2. Seals Always replace. See «CAMSHAFT OIL SEALS, REPLACING»(ref-197058-S11891414042005101100000) .
3. Housing for camshaft adjustment valves
4. Gasket Always replace
5. Exhaust camshaft Checking axial clearance. See «CAMSHAFT AXIAL PLAY, CHECKING»(ref-197058-S19437938772005101100000) . Removing and installing, see «CAMSHAFTS AND CAMSHAFT ADJUSTERS, REMOVING AND INSTALLING»(ref-197058-S08890454852005101100000) Check radial clearance using Plastigage (hydraulic valve lifters removed): Wear limit: 0.1 mm Max. run-out: 0.01 mm
6. Piston rings for camshaft adjuster Engage piston ring ends with each other. See «ENGAGING PISTON RING ENDS»(ref-197058-S25501031392006032100000) .
7. Intake camshaft Checking axial clearance, see «CAMSHAFT AXIAL PLAY, CHECKING»(ref-197058-S19437938772005101100000) Removing and installing, see «CAMSHAFTS AND CAMSHAFT ADJUSTERS, REMOVING AND INSTALLING»(ref-197058-S08890454852005101100000) Check radial clearance using Plastigage (hydraulic valve lifters removed): Wear limit: 0.1 mm Max. run-out: 0.01 mm
8. 10 Nm Tighten in several stages from inside out
9. Guide frame with integrated camshaft bearings Removing and installing Camshafts and camshaft adjuster, see «CAMSHAFTS AND CAMSHAFT ADJUSTERS, REMOVING AND INSTALLING»(ref-197058-S08890454852005101100000) .
10. Sensor wheel Note position (notch on camshaft)
11. 23 Nm
12. Hydraulic valve lifter Checking, see «HYDRAULIC VALVE LIFTERS, CHECKING»(ref-197058-S40896595392005101100000) Removing and installing, see «VALVE STEM OIL SEALS, REPLACING»(ref-197058-S08789216372005101100000) Do not interchange Install with journal surface facing down Before installing, check axial play of camshaft. See «CAMSHAFT AXIAL PLAY, CHECKING»(ref-197058-S19437938772005101100000) . Oil contact surface
13. Valve keepers
14. Valve spring retainer
15. Valve spring
16. Valve stem oil seal Always replace. See «VALVE STEM OIL SEALS, REPLACING»(ref-197058-S08789216372005101100000) .
17. Camshaft Position (CMP) sensor Cylinder bank 1 (right) Camshaft Position (CMP) Sensor -G40-: Cylinder bank 2 (left) Camshaft Position (CMP) Sensor 2-G163
18. 10 Nm
19. Camshaft Position (CMP) sensor for exhaust camshaft Cylinder bank 1 (right) Camshaft Position (CMP) Sensor 3 -G300- Cylinder bank 2 (left) Camshaft Position (CMP) Sensor 4 -G301
20. O-ring Always replace
21. 10 Nm
22. Camshaft Position (CMP) sensor housing
23. Gasket Always replace
24. Cylinder head Observe note Check valve guides, hand-lap valve seats. See «VALVE GUIDES, CHECKING»(ref-197058-S32037142702005101100000) . Reface valve seats. See «VALVE SEATS, REFACING»(ref-197058-S41793658932005101100000) .
25. Intake valve Do not reface, only hand-lapping is permitted Mark installation position for reinstalling Valve dimensions, see «VALVE DIMENSIONS»(ref-197058-S06510922362006032100000) Check valve guides, hand-lap valve seats. See «VALVE GUIDES, CHECKING»(ref-197058-S32037142702005101100000) .
26. Exhaust valves Do not reface, only hand-lapping is permitted Mark installation position for reinstalling Valve dimensions, see «VALVE DIMENSIONS»(ref-197058-S06510922362006032100000) Check valve guides, hand-lap valve seats «VALVE GUIDES, CHECKING»(ref-197058-S32037142702005101100000)

Scheme 270