Leon Mk1
Note
|
| 1 - | Circlip |
| 2 - | Piston pin |
| q | If difficult to move, heat piston to 60 °C |
| q | Remove and install with drift -10 - 14- |
| 3 - | Piston |
| q | check → Chapter |
| q | Mark installation position and cylinder number. |
| q | Arrow on piston crown points to pulley end |
| q | Install using piston ring clamp |
| 4 - | Compression rings |
| q | Offset gaps by 120° |
| q | Remove and fit compression rings using pliers adapted for piston rings |
| q | The mark „TOP“ must face towards piston crown |
| q | Checking ring gap → Chapter |
| q | Checking ring-to-groove clearance → Chapter |
| 5 - | Oil scraper rings |
| q | Carefully remove and install 3-part oil scraper rings by hand. |
| q | Checking ring gap → Chapter |
| q | Ring-to-groove clearance not measurable. |
| 6 - | Conrod bolt |
| q | M8×1: 30 Nm and then turn 90° further |
| q | Replace |
| q | Oil threads and contact surface. |
| q | To measure radial clearance, tighten to corresponding specified torque but not further. |
| 7 - | Conrod bearing cap |
| q | Due to the cracking method used to separate the bearing cap from the conrod in manufacture, the caps only fit in one position and only on the appropriate conrod |
| q | Mark with cylinder number prior to removal -A-. |
| q | Fitting position: the marking -B- shows toward the belt pulley (if there is no marking, this must be made before removing) |
| 8 - | Bearing cap |
| q | Do not interchange used bearing shells. |
| q | Insert bearing shells centrally. |
| Checking radial clearance with Plastigage: |
| q | New: 0.020 ... 0.060 mm |
| q | Wear limit: 0.070 mm |
| q | Do not rotate crankshaft when checking radial clearance. |
| 9 - | 27 Nm |
| q | Opening pressure of the overpressure valve: 1.8 ... 2.2 bar |
| 10 - | Oil spray jet |
| q | For piston cooling |
| 11 - | Conrod |
| q | Renew as set only. |
| q | Mark cylinder allocation -A- |
| q | Fitting position: the marking -B- shows toward the belt pulley (if there is no marking, this must be made before removing) |
| q | Guided axially by piston. |
