Leon Mk2
Note
|
| 1 - | Retaining ring |
| 2 - | Piston pin |
| q | If difficult to remove, 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 belt 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 | „TOP“ faces towards piston crown. |
| q | Checking ring gap → Chapter |
| q | Checking ring-to-groove clearance → Chapter |
| 5 - | Oil scraper rings |
| q | Carefully remove and install by hand the oil scraper rings made up of 3 parts |
| q | Checking ring gap → Chapter |
| q | Ring-to-groove clearance cannot be checked |
| 6 - | Conrod bolt |
| q | M7×0.75: 20 Nm + 1/4 turn (90°) further. |
| q | M8×1: 30 Nm + 1/4 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 | The caps only fit in one position and only on the appropriate conrod due to the breaking procedure (cracking) separating the cap from the conrod. |
| q | Mark with cylinder number prior to removal -A-. |
| q | Installation position: Mark -B- points to belt pulley end (if mark is missing, mark before removing). |
| 8 - | Bearing shell |
| q | Do not interchange used bearing shells. |
| q | Insert bearing shells centrally. |
| Check the radial play using a Plastigage: |
| q | New: 0.020 ... 0.060 mm |
| q | Wear limit: 0.090 mm. |
| q | Do not turn crankshaft when measuring radial clearance |
| 9 - | 27 Nm |
| q | Opening pressure of pressure relief valve: 1.8…2.2 bar |
| 10 - | Oil spray jet |
| q | For cooling the piston |
| 11 - | Conrod |
| q | Renew as set only. |
| q | Mark cylinder allocation -A- |
| q | Installation position: Mark -B- points to belt pulley end (if mark is missing, mark before removing). |
| q | Piston axial guided |
