Leon Mk2
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. |