Leon Mk2
| Valve control - Assembly overview: Engine code letters AZQ, BME and BXV. |
Note| Cylinder heads which have cracks between the valve seats or between valve seat inserts and the spark plug thread can still be used without reducing service life, provided the cracks do not exceed a maximum of 0.5 mm in width, or when no more than the first threads are cracked. |
| 1 - | 10 Nm + 1/4 turn (90°) further |
| q | replace |
| q | Sequence of loosening → Anchor and tightening → Anchor |
| 2 - | 10 Nm + 1/4 turn (90°) further |
| q | replace |
| q | Sequence of loosening → Anchor and tightening → Anchor |
| 3 - | O ring |
| q | Replace if damaged |
| 4 - | Hall sender -G40- |
| q | check → Chapter |
| 5 - | 10 Nm |
| 6 - | 10 Nm |
| 7 - | Support |
| q | For the cable harness |
| 8 - | 10 Nm |
| 9 - | Sealing cap |
| 10 - | Exhaust camshaft |
| q | check the axial play → Chapter |
| 11 - | Camshaft bearing caps |
| 12 - | Roller rocker arms |
| q | Check roller bearings for ease of movement |
| q | Lubricate contact surface |
| q | ?When installing, secure to support element using securing clip. |
| 13 - | Supporting element |
| q | Do not mix them up |
| q | With hydraulic valve clearance compensation. |
| q | Checking axial clearance of camshaft before fitting → Fig. |
| q | Lubricate contact surface |
| 14 - | Woodruff keys |
| 15 - | Valve plate spring |
| 16 - | Valve spring |
| q | Removing and installing |
| t | Cylinder head removed → Chapter, Valve stem seals: replacing |
| t | Cylinder head in place → Chapter, Valve stem seals: replacing |
| 17 - | Valve stem seal |
| q | replace → Chapter |
| 18 - | Oil pressure switch -F1-, 0.3 ... 0.7 bar, 25 Nm |
| q | check → Chapter |
| 19 - | Valves: |
| q | Not to be reworked, only grinding in is permissible |
| q | Valve dimensions → Fig. |
| 20 - | Cylinder head |
| q | Cylinder head: check for deformation → Fig. |
| q | Cylinder head sealing surface, engine block side: reworking → Fig. |
| q | Reworking valve seats → Chapter. |
| 21 - | Oil seal |
| q | Clean the filter if dirty |
| 22 - | 20 Nm |
| 23 - | Attachment rings |
| 24 - | Pinions |
| q | For camshaft |
| 25 - | 50 Nm + 1/4 turn (90°) further |
| q | Block sprockets with retaining tool -T20018B-. |
| 26 - | Washer |
| q | Only for AZQ engines |
| 27 - | Supply camshaft |
| q | check the axial play → Chapter |
| 28 - | 15 Nm |
| q | Only for AZQ engines |
| 29 - | Guide rail |
| q | Only for AZQ engines |
| 30 - | Camshaft housing |
| q | Do not rework the sealing surfaces |
| q | With fitted camshafts |
| q | Remove all remains of sealant with a standard seal remover or a flat scraper |
| q | Removing and installing → Chapter |
| q | Before fitting, apply sealant paste → Parts catalogue |
| q | To fit, place vertically from the top with the adjustment bolts in the cylinder head holes |
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