Leon Mk1
Valve control: repairing |
Note!
t | The cylinderheads with cracks between the valve seats can still be used without decrease in their useful life, so long as the cracks are no wider than 0.5 mm max. |
t | Before installation work, oil the support and slide surfaces. |
1 - | 20 Nm + 1/4 turn (90°) |
q | Replace |
q | Follow the installation order when loosening and tightening → Fig., Camshaft: removing and installing |
2 - | Rocker shaft |
3 - | Cylinderhead bolt |
q | Replace |
q | Follow the installation order when loosening and tightening → Anchor, Cylinderhead: removing and installing |
q | Before installation, fit the washers → Item in the cylinderhead |
4 - | Washer |
q | For the cylinderhead bolts |
5 - | Hydraulic plunger |
q | Before removing, remove the half-bearings of the camshaft |
q | Do not swap them |
q | With hydraulic compensation of valve play |
q | Place with the slide surface down |
q | Before installation test the axial play of the camshaft → Fig. |
q | Lubricate the slide surface |
6 - | Half-cones |
7 - | Valve spring plate |
8 - | Valve spring, exterior |
q | Remove and install: Cylinderhead: removed: with -T20034/1- installed: → Item, replace the valve stem seals |
9 - | Valve spring, interior |
q | Remove and install: Cylinderhead: removed: with -T20034/1- installed: → Item, replace the valve stem seals |
10 - | Valve stem seal |
q | Replace → Item |
11 - | Valve guide |
q | Test → Item |
q | Replace → Item |
q | Repair guides, with collar |
12 - | Pump injector |
q | Remove and install → Chapter |
13 - | Cylinderhead |
q | Bear in mind the note → Anchor |
q | Re-cut the valve seats → Chapter |
14 - | Seal |
q | Do not apply more oil or grease to the seal lip |
q | Before installation, clean excess oil from the camshaft journal with a clean cloth |
q | For installation, cover the slot in the camshaft cone (e.g. with tape) |
q | Remove and install → Chapter |
15 - | Valves |
q | Valve dimensions → Fig. |
16 - | Half-bearings |
q | Do not swap the used half-bearings (mark them) |
q | Check that the cylinderhead and the fixing flanges fit well in the caps |
17 - | Camshaft |
q | Test the axial play → Fig. |
q | Remove and install → Fig. |
q | Test the radial play with Plastigage Wear limit: 0.11 mm |
q | Eccentricity: max. 0.01 mm |
q | Identification and distribution timing → Fig. |
18 - | Cap |
q | Installation order → Fig., Camshaft: removing and installing |
q | Cap 4 is marked as cap 5 |
q | For installation, seal the contact surfaces of caps 1 and 4 with -AMV 17400401- → Fig. |
19 - | 20 Nm + 1/4 turn (90°) |
q | Replace |
Note!
|
Note!
|
Dimension | Intake valve | Exhaust valve | |
Ø a | mm | 35.95 | 31.45 |
Ø b | mm | 6.980 | 6.956 |
c | mm | 89.95 | 89.95 |
α | ∠° | 45 | 45 |
|
Cylinder 3 -arrow- | 045 C |
|
Intake opens after TDC | 15.8° | ||
Intake closes after BDC | 25.3° | ||
Exhaust opens before BDC | 28.2° | ||
Exhaust closes before TDC | 18.7° |