A3 Mk2
Valve gear - exploded view |
1 - | 100 Nm |
q | Use counterhold tool -3415- when loosening and tightening → Fig. |
2 - | Camshaft sprocket |
q | Remove toothed belt prior to removing and installing → Chapter |
q | Located in position by parallel key -item 4- |
3 - | Seal |
q | Renewing → Chapter |
4 - | Parallel key |
q | Check for firm attachment |
5 - | 23 Nm |
q | Observe correct 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 | Runout: max. 0.04 mm |
q | Measuring axial clearance → Chapter |
q | Measuring radial 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 clearance compensation → Chapter |
q | Do not interchange |
q | Lubricate contact surface |
10 - | Valve cotters |
11 - | Valve spring plate |
12 - | Valve spring |
q | Remove and install with cylinder head removed using valve spring compressor -2037- |
13 - | Valve stem oil seal |
q | Renewing: with cylinder head installed → Chapter, with cylinder head removed → Chapter |
14 - | Valve guide |
q | Checking → Chapter |
15 - | Filler 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 | Remove and install with cylinder head removed using valve spring compressor -2037- |
q | Must not be machined; only grinding-in is permissible |
q | Valve dimensions → Chapter |
q | Checking valve guides → Chapter |
q | Machining valve seats → Chapter |