Roomster
| Summary of components |
Note| Before assembly oil all bearing and contact surfaces. |
| 1 - | Circlip |
| 2 - | Piston pin |
| q | if stiff, heat piston to 60°C |
| q | use drift -T10046- for removing and installing |
| 3 - | Piston |
| q | check → Fig. |
| q | mark installation position and matching cylinder |
| q | arrow on the piston crown faces towards the belt pulley side |
| q | use piston ring tensioning strap for installing |
| q | Piston Ø: 70.95 mm (nominal dimension) |
| q | Cylinder Ø: 71.00 mm (nominal dimension) |
| 4 - | Compression rings |
| q | Offset joint 120° |
| q | use piston ring pliers for removing and installing compression rings |
| q | Marking „TOP“ faces piston crown |
| q | Inspect gap clearance → Fig. |
| q | Inspect end clearance → Fig. |
| 5 - | Oil scraper rings |
| q | carefully remove and install 3-part oil scraper rings by hand |
| q | Inspect gap clearance → Fig. |
| q | End clearance cannot be measured |
| 6 - | 30 Nm + torque a further 90° (1/4 turn) |
| q | replace |
| q | Oil thread and contact surface |
| 7 - | Conrod bearing cap |
| q | as a result of the conrods separated in the cracking process, the cover fits only in one position and only to the relevant conrod |
| q | Mark the assignment of the cylinder before removal -A- |
| q | Fitting position: Marking -B- points to the belt pulley side (mark before removing if marking is missing) |
| 8 - | Bearing shell |
| q | do not mix up used bearing shells |
| q | insert bearing shells in the centre |
| 9 - | Pressure relief valve, 27 Nm |
| q | Opening pressure: 0.2 MPa (2.0 bar) |
| 10 - | Oil injection nozzle |
| q | for piston cooling |
| q | Align the guide edge of the oil injection nozzle -arrow- to the area of the cylinder block being worked on. |
| 11 - | Conrod |
| q | always replace as a set only |
| q | mark matching cylinder -A- |
| q | Fitting position: Marking -B- points to the belt pulley side (mark before removing if marking is missing) |
| q | located axially by pistons |
| q | separate new conrod → Chapter |
