A4 Mk1
| Valve gear - exploded view of components |
| 1 - | 100 Nm |
| q | Use counterhold tool -3415- when loosening and tightening |
| 2 - | Camshaft sprocket |
| q | Installation position fixed by parallel key → Item |
| 3 - | Oil seal |
| q | Renewing → Chapter |
| 4 - | Parallel key |
| q | Check for firm attachment |
| 5 - | 23 Nm |
| q | Tightening sequence → Anchor |
| 6 - | Retaining frame |
| q | With integrated camshaft bearings |
| q | Bearing 1 at pulley end |
| q | Removing and installing → Chapter „Removing and installing camshaft“ |
| q | Sealing surface must not be machined |
| 7 - | Camshaft |
| q | Check radial clearance with Plastigage (rocker fingers not installed), Wear limit: 0.1 mm |
| q | Runout: max. 0.04 mm |
| q | Checking axial clearance → Chapter |
| q | Removing and installing → Chapter |
| 8 - | Roller rocker finger |
| q | Do not interchange |
| q | Check roller bearing |
| q | Lubricate contact surface |
| q | Use retaining clip to clip onto supporting element when installing |
| 9 - | Supporting element |
| q | With hydraulic valve clearance compensation |
| q | Checking hydraulic valve play compensation → Chapter |
| q | Do not interchange |
| q | Lubricate contact surface |
| 10 - | Valve cotters |
| 11 - | Valve spring plate |
| 12 - | Valve spring |
| q | Removing and installing with cylinder head installed → Chapter „Renewing valve stem oil seals“ |
| q | Remove and install with cylinder head removed using valve spring compressor -2037- |
| 13 - | Valve stem oil seal |
| q | Renewing → Chapter |
| 14 - | Valve guide |
| q | Checking → Chapter |
| 15 - | Sealing cap |
| q | Insert flush |
| q | Punch hole in centre using a screwdriver and lever off for removal |
| 16 - | Cylinder head |
| q | See note → Chapter |
| q | Checking valve guides → Chapter |
| q | Machining valve seats → Chapter |
| q | Sealing surface on camshaft side must not be machined. |
| 17 - | Valve |
| q | Must not be machined; only grinding-in is permissible |
| q | Remove and install with cylinder head removed using valve spring compressor -2037- |
| q | Valve dimensions → Chapter |
| q | Checking valve guides → Chapter |
| q | Machining valve seats → Chapter |
