Table of contents: Bulkhead ↓ Cleaning ↓
Cylinder head (ADR)
- 1. Camshaft sprocket bolt
- 2. Camshaft sprocket
- 3. Seal
- 4. Head
- 5. Valve stem seal
- 6. Valve spring
- 7. Spring seat
- 8. Conical bushings
- 9. Hydraulic pusher
- 10. Intake camshaft
- 11. Intake camshaft bearing cap
- 12. Front combination cover
- 13. Exhaust camshaft
- 14. Exhaust camshaft bearing cap
- 15. Cover bolt
- 16. Chain
- 17. Automatic shaft regulator
- 18. Rubber gasket
- 19. Semi-circular sealing sleeve
- 20. Exhaust valve
- 21. Inlet valve
- 22. Seal
- 23. Hall sensor ring
- 24. Cone washer
- 25. Bolt
- 26. Hall sensor
- 27. Sensor bolt
Cylinder head (AAE, ABK, AAD, 1Z, AHU)
- 1. Camshaft bearing cap
- 2. Nut
- 3. Camshaft
- 4. Segment key
- 5. Camshaft sprocket bolt
- 6. Hydraulic pusher
- 7. Spring plate
- 8. Valve springs
- 9. Valve stem gaskets
- 10. Spring seat
- 11. Valve guide bushings
- 12. Valves
- 13. Plug
- 14. Camshaft oil seal
- 15. Cylinder head
Cylinder head (ACE)
- 1. Camshaft sprocket bolt
- 2. Camshaft bearing cap nut
- 3. Bearing cap
- 4. Chain
- 5. Camshaft
- 6. Hydraulic pusher
- 7. Conical bushings
- 8. Spring plate
- 9. Valve spring
- 10. Valve stem seal
- 11. Spring seat
- 12. Guide bushing
- 13. Camshaft oil seal
- 14. Cylinder head
- 15. Valves
Cylinder head (AAR, AAN)
- 1. Camshaft bearing cap
- 2. Nut
- 3. Camshaft
- 4. Seal
- 5. Hydraulic pusher
- 6. Conical bushings
- 7. Spring plate
- 8. Valve springs
- 9. Valve stem seal
- 10. Valve spring seat
- 11. Valve guide bushing
- 12. Guide bushing with seal
- 13. Cylinder head
- 14. Valves
- 15. Minimum head height
Cylinder head (AAS)
- 1. Nut
- 2. Pin
- 3. Bearing caps
- 4. Camshaft
- 5. Hydraulic pusher
- 6. Conical bushings
- 7. Spring plate
- 8. External spring
- 10. Spring seat
- 11. Valve stem seal
- 12. Guide bushing
- 13. Rear oil seal
- 14. Injector
- 15. Thermal insulation shield
- 16. Candle
- 17. Cylinder head
- 18. Valves
- 19. Front oil seal
Bulkhead
1. Remove the cylinder head.
2. Unscrew the coolant pipe.
3. Remove the gasket.
4. Unscrew the coolant sensor and oil pressure switch.
5. Place parts in separate labeled bags or boxes.
ADR engines
5. Unscrew the Hall sensor, remove the washer and the sensor plate.
6. Using special tool 3366, lock the automatic camshaft adjuster.
7. Clean the chain and sprockets.
8. Loosen the camshaft bearing cap bolts (see fig. Cylinder Head (ADR)).
9. Remove the automatic camshaft adjuster bolts.
10. Remove both shafts together with the regulator and chain.
11. Remove the camshaft oil seals.
Engines AAE, ABK, AAD, 1Z, AHU
12. Loosen the bearing cap nuts N5,1 and 3, then N₂ and 4 (see Fig. Cylinder head (AAE, ABK, AAD, 1Z, AHU)).
ACE Engines
13. Remove the ignition distributor.
14. Remove the nuts of the intake valve shaft bearing caps N5 and 7, then N6 and 8. Remove the nuts of the exhaust valve shaft bearings N1 and 3, then N₂ and 4. Remove all caps (see Fig. Cylinder Head (ACE)).
15. Remove the shafts together with the chain. Remove the exhaust valve shaft seal.
Engines AAR, AAN, AAS
16. Remove the ignition distributor (AAS).
17. Loosen the nuts of the bearing caps N₂ and 4, and then N1 and 3 (see Fig. Cylinder head (AAR, AAN), Cylinder head (AAS)). Remove the caps.
Engines ABP, AAT, AEL
18. Unscrew the nuts of the bearing caps N₂ and 4, and then the caps N1 and 3.
19. Remove the bearing caps.
20. Remove the camshaft seals.
21. Remove the camshaft.
All types of engines
22. Remove the hydraulic lifters and note their correct location.
23. Compress the valve springs with a special tool and remove the cone bushings.
24. Remove the spring plates, springs and their seats. Use a special tool.
25. Remove the valve stem seals.
26. Remove the valves.
Cleaning
Thoroughly clean the head surfaces and bores. Clean the valves and tappets.
(This article was copied from an online resource: AudiManual)