Leon Mk2
| Valve gear - Components overview |
| 1 - | 20 Nm + 1/4 turn (90 °) |
| q | Renew |
| q | Use locking spanner -T10016- → Fig.to loosen and tighten |
| 2 - | Camshaft gear |
| q | Note the position when fitting the toothed belt → Chapter |
| 3 - | Oil seal |
| q | Only replace with camshaft fitted |
| q | Lightly lubricate the sealing lip of the oil seal |
| q | Renew → Chapter |
| 4 - | Secondary branch notched belt |
| q | Mark D.O.R. before removing |
| q | Check for wear |
| q | Do not kink |
| q | Removing, installing and tensioning → Chapter |
| 5 - | Camshaft housing |
| q | Removing and installing → Chapter |
| q | Remove remnants of old sealant |
| q | Before fitting apply -D 188 003 A1- → ETKA (electronic parts catalogue) |
| q | When installing fit vertically from above onto studs and dowel pins |
| 6 - | 10 Nm + 1/4 turn (90 °) |
| q | Renew |
| q | Tighten from centre outwards |
| 7 - | Cover/support for Ignition transformer -N152- |
| 8 - | 10 Nm |
| 9 - | Roller rocker finger |
| q | Check roller bearing |
| q | Oil sliding surface |
| q | Use securing clip to clip onto support element when installing |
| 10 - | Semicones |
| 11 - | Plug |
| 12 - | 20 Nm |
| 13 - | Lifting eye |
| 14 - | Pressure retaining valve, 6 Nm |
| q | Clean the thread and fit with -D 154 102 A1- → ETKA (electronic catalogue of parts) |
| q | Do not over tighten; the valve could seize |
| 15 - | Supporting element |
| q | Check the oil injection hole |
| q | With hydraulic valve clearance compensation. |
| q | Do not mix them up |
| q | Before installing check camshaft axial clearance → Fig. |
| q | Oil sliding surface |
| 16 - | Valve plate spring |
| 17 - | Valve spring |
| q | Removing and installing |
| t | Dismounted cylinder head → Chapter, Valve shaft seals: replacing |
| t | Installed cylinder head → Chapter, Valve shaft seals: replacing |
| 18 - | Valve stem seal |
| q | Renew → Chapter |
| 19 - | Valve guide |
| q | Testing → Chapter |
| 20 - | Oil pressure switch -F1- 0.3 - 0.7 bar, 25 Nm |
| q | Testing → Chapter |
| q | In case of leakage, cut out and replace sealing ring |
| 21 - | Valves |
| q | Not to be reworked; only grinding-in permissible |
| q | Valve dimensions → Fig. |
| 22 - | Cylinder head |
| q | Valve seats: reworking → Chapter |
| q | Cylinder head sealing surface: reworking → Fig. |
| 23 - | 20 Nm |
| 24 - | Tension roller of the derived branch of the notched belt. |
| q | Testing → Chapter |
| q | Notched belt: fitting and tensioning → Chapter |
| 25 - | Seal bolt 45 Nm |
| q | Fit with -D 154 102 A1- → ETKA (electronic parts catalogue) |
| q | Do not screw too far |
| q | Maximum depth of entrance below support surface of camshaft housing: 2 mm |
| 26 - | Camshafts |
| q | Check axial clearance → Fig. |
| q | Oil before fitting (also the bearing of the axial bush) |
| q | Identification of the camshafts, distribution timing → Fig. |
| q | Replace the seal rings behind the assembly |
| q | Camshaft seals: replacement → Chapter |
| 27 - | O-ring |
| q | Renew |
| q | Oil before fitting |
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| Engine codes | AUB, BBZ | BBY, BKY |
| Identification between the cam pairs | cylinder 1 and 2 | cylinder 1 and 2 |
| Intake cam -E- | “036AF” | “036AC” |
| Exhaust cam -A- | “036AG” | “036AA” |
Note
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| Dim. | Inlet valve | Outlet valve | |
| Ø a | mm | 29,5 | 26,0 |
| Ø b | mm | 5,973 | 5,953 |
| c | mm | 100,9 | 100,5 |
| α | ∠° | 45 | 45 |
