Leon Mk2
| Servicing valve gear |
Note!| Cylinder heads which have cracks between the valve seats or between valve seat inserts and the spark plug thread can be used further 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 spark plug thread is cracked. |
| 1 - | Camshaft |
| q | Checking axial clearance → Fig. |
| q | Check the radial clearance with the Plastigage Wear limit: 0.1 mm |
| q | Run-out: max. 0.01 mm |
| q | Identification and valve timing → Anchor |
| q | Dismount and assemble → Chapter |
| q | Oil contact surface |
| 2 - | 6 Nm + 1/4 turn (90°) further |
| q | Renew |
| q | Observe installation instructions and sequence when loosening and tightening → Chapter |
| 3 - | Cylinder head cover |
| q | Not permitted to work sealing surfaces |
| q | With integrated camshaft bearings |
| q | Remove remnants of old sealant |
| q | Coat with AMV 154 103 before fitting |
| q | When installing, insert vertically from above with dowel pins into holes of cylinder head |
| q | Removing and installing → Chapter |
| 4 - | Oil seal |
| q | Lightly oil sealing lip of oil seal |
| q | Renew → Chapter |
| 5 - | Floating roller rocker arm |
| q | Check bearing for ease of movement |
| q | Oil contact surface |
| q | Use securing clip to clip onto support element when installing |
| 6 - | Retaining clip |
| 7 - | Support element |
| q | Do not interchange |
| q | With hydraulic valve clearance compensation |
| q | Oil contact surface |
| q | Check camshaft axial clearance before installing → Fig. |
| 8 - | 20 Nm |
| 9 - | Support/Lifting eye |
| 10 - | Cylinder head |
| q | Reworking the sealing surface on the camshaft side is not permitted |
| q | Reworking valve seats → Chapter |
| q | Reworking sealing surface on cylinder block side → Fig. |
| 11 - | Valves |
| q | Do not rework only grinding-in is permitted |
| q | Valve dimensions → Fig. |
| 12 - | Valve guide |
| q | Checking → Chapter |
| q | Renewing → Chapter |
| 13 - | Service part - valve guide |
| q | With collar |
| 14 - | Valve stem seal |
| q | Renewing → Chapter |
| 15 - | Valve spring |
| q | Removing and installing: |
| q | Cylinder head Dismounted: with -T20034B/1- Assembled → Chapter |
| 16 - | Upper valve spring plate |
| 17 - | Cotters |
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| Markings between No. 1 cylinder inlet and exhaust cam lob pairing |
| “030 BP” |
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| Inlet opens after the PMS | 9.9° |
| Inlet closes after the PMI | 28.9° |
| Exhaust opens before the PMI | 30.1° |
| Exhaust closes before the PMS | 11.1° |
Note!
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| Dimension | Inlet valve | Exhaust valve | |
| Ø a | mm | 31.0 | 26.0 |
| Ø b | mm | 5.98 | 5.96 |
| c | mm | 99.9 | 99.9 |
| ∞ | ∠° | 45 | 45 |
