Leon Mk1
| Valve gear - assembly overview |
| 1 - | Outlet valve |
| q | Not to be reworked, only grinding in is permissible |
| q | Valve dimensions → Fig. |
| q | Checking valve guides → Chapter |
| 2 - | Cylinder head |
| 3 - | Valve guide |
| q | check → Chapter |
| 4 - | Valve stem seal |
| 5 - | Valve spring |
| 6 - | Valve plate spring |
| 7 - | Woodruff keys |
| 8 - | Hydraulic valve compensation element |
| q | Do not interchange |
| q | Oil sliding surfaces |
| 9 - | Exhaust camshaft |
| q | Check radial clearance with Plastigage (roller rocker fingers removed) |
| q | Radial play on Ø 24 mm bearings : 0.024 ... 0.066 mm |
| q | Radial play on Ø 32 mm bearings : 0.030 ... 0.051 mm |
| q | out-of-true: Max. 0.04 mm |
| 10 - | Cylinder head cover |
| q | With integrated camshaft bearings |
| q | Clean seal surface. Do not rework |
| q | Remove any sealant remains. |
| 11 - | Bolt |
| q | replace |
| q | Tightening sequence → Fig. |
| 12 - | O ring |
| q | Lubricate with engine oil |
| 13 - | Sealing cap |
| q | replace |
| 14 - | Supply camshaft |
| q | Check radial clearance with Plastigage (roller rocker fingers removed) |
| q | Radial play on Ø 24 mm bearings : 0.024 ... 0.066 mm |
| q | out-of-true: Max. 0.04 mm |
| 15 - | Sealing cap |
| q | replace |
| q | Removing: sealing cap with cylinder head cover installed: pierce on one side of the cover with a punch and pry out |
| q | Installing: press in 1 … 2 mm deep without sealant using thrust piece -3334-. |
| 16 - | Inlet valve |
| q | Not to be reworked, only grinding in is permissible |
| q | Valve dimensions → Fig. |
| q | Checking valve guides → Chapter |
Note
|
|
| Dim. | Inlet valve | Outlet valve | |
| Ø a | mm | 33,85 ± 0,10 | 28,0 ± 0,1 |
| Ø b | mm | 5,98 ± 0,007 | 5,955 ± 0,007 |
| c | mm | 103,97 | 101,87 |
| α | ∠° | 45 | 45 |
