A3 Mk2
| Valve gear - exploded view |
| 1 - | Valve |
| q | Must not be machined; only grinding-in is permissible |
| q | Mark installation position for re-installation |
| q | Checking → Chapter |
| q | Valve dimensions → Chapter |
| q | Checking valve guides → Chapter |
| 2 - | Cylinder head |
| 3 - | Valve stem oil seal |
| q | Renewing with cylinder head installed → Chapter |
| q | Renewing with cylinder head removed → Chapter |
| 4 - | Valve spring |
| 5 - | Valve spring plate |
| 6 - | Valve cotters |
| 7 - | Sealing cap |
| q | Renew |
| q | Removing sealing cap with retaining frame installed: pierce on one side with an awl and pry out |
| q | Installing: drive in without sealant using suitable thrust piece |
| q | Installation depth 1 ... 2 mm |
| 8 - | Oil seal |
| q | Different versions available; for allocation refer to → Electronic parts catalogue |
| q | Renewing → Chapter |
| 9 - | Exhaust camshaft |
| q | Removing and installing → Chapter |
| q | Measuring axial clearance → Chapter |
| q | Measuring radial clearance → Chapter |
| 10 - | Bolt |
| q | Correct sequence when slackening → Anchor |
| q | Tightening torque and sequence → Fig. |
| 11 - | Retaining frame |
| q | With integrated camshaft bearings |
| q | Removing and installing → Chapter „Removing and installing camshafts“ |
| 12 - | Inlet camshaft |
| q | Removing and installing → Chapter |
| q | Measuring axial clearance → Chapter |
| q | Measuring radial clearance → Chapter |
| 13 - | Roller rocker finger |
| q | Removing and installing → Chapter „Removing and installing camshafts“ |
| q | Mark installation position for re-installation |
| q | Check roller bearings for ease of movement |
| q | Lubricate contact surfaces before installing |
| 14 - | Securing clip |
| q | For hydraulic compensation element |
| 15 - | Hydraulic valve compensation element |
| q | Checking → Chapter |
| q | Mark installation position for re-installation |
| q | Lubricate contact surfaces before installing |
| q | Checking → Chapter |
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| Stage | Bolts | Tightening torque | ||
| 1. | -1 … 24- | Screw in bolts by hand until they make contact
| ||
| 2. | -1 … 24- | 10 Nm |
