A4 Mk2
| Valve gear - exploded view of components |
| 1 - | Exhaust valve |
| q | Different versions available → Electronic parts catalogue |
| q | Do not machine, only grinding-in is permitted |
| q | Mark installation position for re-installation |
| q | Valve dimensions → Chapter |
| q | Checking valve guides → Chapter |
| 2 - | Sealing plugs |
| q | Apply sealant when installing; refer to → Electronic parts catalogue |
| 3 - | Cylinder head |
| q | Checking valve guides → Chapter |
| 4 - | Hydraulic valve compensation element |
| q | Checking → Chapter |
| q | Do not interchange |
| q | Lubricate contact surface |
| 5 - | Securing clip |
| q | Check for firm attachment |
| 6 - | Inlet camshaft |
| q | Removing and installing → Chapter |
| q | Checking axial clearance → Chapter |
| q | Check radial clearance with Plastigage (roller rocker fingers removed) |
| q | Radial clearance when bearing Ø is 24 mm: 0.024 ... 0.066 mm |
| q | Radial clearance when bearing Ø is 36 mm: 0.032 ... 0.078 mm |
| q | Runout: max. 0.04 mm |
| 7 - | Retaining frame |
| q | With integrated camshaft bearings |
| q | Removing and installing → Chapter „Removing and installing camshafts“ |
| 8 - | 8 Nm + 90° (1/4 turn) further |
| q | Renew |
| 9 - | Exhaust camshaft |
| q | Removing and installing → Chapter |
| q | Checking axial clearance → Chapter |
| q | Check radial clearance with Plastigage (roller rocker fingers removed) |
| q | Radial clearance when bearing Ø is 24 mm: 0.024 ... 0.066 mm |
| q | Radial clearance when bearing Ø is 36 mm: 0.032 ... 0.078 mm |
| q | Runout: max. 0.04 mm |
| 10 - | Roller rocker finger |
| q | Do not interchange |
| q | Check roller bearings for ease of movement |
| q | Lubricate contact surface |
| q | Assembly: attach to hydraulic compensation element -item 4- using securing clip -item 5- |
| 11 - | Valve cotters |
| 12 - | Valve spring plate |
| 13 - | Valve spring |
| q | Installation position: the narrow spring coils face the cylinder head |
| 14 - | Valve stem oil seal |
| q | Renewing (cylinder head installed) → Chapter |
| q | Renewing (cylinder head removed) → Chapter |
| 15 - | Inlet valve |
| q | Do not machine, only grinding-in is permitted |
| q | Mark installation position for re-installation |
| q | Valve dimensions → Chapter |
| q | Checking valve guides → Chapter |
