Polo Mk3
| Engine code AEV |
| 1 - | Piston rings |
| q | Offset gaps by 120°. |
| q | Remove and install using piston ring pliers |
| q | “TOP” faces towards piston crown |
| q | Checking ring gap → Chapter. |
| q | Checking ring-to-groove clearance → Chapter. |
| 2 - | Piston |
| q | Checking → Chapter |
| q | Mark installation position and cylinder number |
| q | Arrow on piston crown points to pulley end |
| q | Install using piston ring clamp |
| 3 - | Conrod |
| q | Renew as set only. |
| q | Mark with cylinder number -A-. |
| q | Installation position: Marking -B- faces towards belt pulley end |
| 4 - | Conrod bearing cap |
| q | Observe installation position |
| 5 - | 30 Nm + 1/4 turn (90 °) further |
| q | Oil threads and contact surface |
| q | To measure radial clearance, tighten to 30 Nm but not further. |
| 6 - | Bearing shell |
| q | Observe installation position |
| q | Do not interchange used bearing shells |
| q | Ensure retaining lug fits tightly in recess, measure preload for this → Chapter |
| q | Axial clearance new: 0.05…0.31 mm, wear limit 0.40 mm |
| q | Check radial clearance with Plastigage: new: 0.010…0.047 mm, wear limit: 0.091 mm. Do not rotate crankshaft when checking radial clearance. |
| 7 - | Cylinder block |
| q | Checking cylinder bores → Chapter |
| q | Piston and cylinder dimensions → Chapter |
| 8 - | Conrod bolt |
| q | Renew |
| 9 - | Locking ring |
| 10 - | Piston pin |
| q | If difficult to remove, heat piston to 60 °C |
| q | Remove and install with drift -VW 222 A- |
