A4 Cabriolet 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 |