Leon Mk1
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1 - | Conrod bolt, 30 Nm + 1/ further 4 turn (90°) |
q | Replace |
q | Oil threads and contact surface. |
q | To measure the radial play, use used bolts |
q | When measuring radial clearance, tighten to 30 Nm but do not turn further |
2 - | Bolt with pressure relief valve, 27 Nm |
q | Opening pressure 1.3 ... 1.6 bar |
3 - | Oil spray jet |
q | For piston cooling. |
4 - | Conrod bearing cap |
q | Mark cylinder number -B- |
q | Fitting position: Marking -A- towards the pulley end |
5 - | Bearing shells |
q | Upper bearing shell with a drilled hole for lubricating the piston pin |
q | Installation position → Fig. |
q | Do not interchange used bearing shells (mark). |
q | New axial play: 0,10 ... 0.35 mm. Wear limit: 0.40 mm |
q | Recheck the radial play using a Plastigage New: 0,02 ... 0.06 mm. Wear limit: 0.09 mm do not rotate the crankshaft during the radial play measurement |
6 - | Conrod |
q | With industrially cracked conrod cap. |
q | Renew as set only. |
q | Mark cylinder number -B- |
q | Fitting position: Marking -A- towards the pulley end |
q | With a drilled hole for lubricating the piston pin |
7 - | Circlip |
8 - | Piston pin |
q | If difficult to move, heat piston to 60 °C |
q | Removing and installing with the awl -T20019- |
9 - | Piston |
q | check → Fig. |
q | Mark installation position and cylinder number. |
q | Arrow on piston crown points to pulley end |
q | Install using piston ring clamp |
q | Piston and cylinder dimensions → Chapter |
q | Checking cylinder bore → Fig. |
10 - | Piston rings |
q | Displace the gaps at 120° from each other |
q | Use piston ring pliers to remove and install |
q | The mark „TOP“ must face towards piston crown |
q | Piston ring ends: check clearance → Fig. |
q | Checking ring-to-groove clearance → Fig. |
Piston ring Dimensions in mm | new | Wear limit |
compression ring | 0,20 ... 0,40 | 0,8 |
Oil scraping ring | 0,25 ... 0,50 | 0,8 |
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Piston ring Dimensions in mm | new | Wear limit |
compression ring | 0,06 ... 0,09 | 0,20 |
Oil scraping ring | 0,03 ... 0,06 | 0,15 |
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Note
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