Leon Mk1
| Diagram of coolant hose connections |
| 1 - | Gear oil cooler |
| q | Is only fitted on vehicles with manual gearbox |
| 2 - | Engine oil cooler |
| q | Removing and installing → Chapter. |
| 3 - | exhaust gas recirculation radiator |
| q | Removing and installing → Chapter. |
| 4 - | Radiator outlet coolant temperature sender -G83- |
| q | Removing and installing → Chapter. |
| 5 - | Coolant temperature sender -G62- |
| q | Removing and installing → Chapter. |
| 6 - | Coolant shut-off valve |
| q | Not fitted on all versions |
| q | Depending on the production time and the vehicle version |
| q | Control by the Climatronic coolant shut-off valve -N422- |
| 7 - | Bleeder hole |
| 8 - | Heat exchanger |
| q | If renewed, refill system with fresh coolant. |
| 9 - | Coolant circulation pump -V50- |
| q | Only installed in vehicles with Start-Stop system |
| 10 - | Retaining valve |
| 11 - | Thermostat with hose |
| 12 - | Coolant expansion tank |
| q | With cap |
| q | Checking cooling system for leaks → Chapter. |
| 13 - | Pump for exhaust gas recirculation cooler -V400- |
| 14 - | Coolant pump |
| q | Removing and installing → Chapter. |
| 15 - | 4/2-way valve with thermostat |
| q | Removing and installing → Chapter. |
| q | The thermostat is integrated in the f4/2 way valve and cannot be renewed on its own. |
| 16 - | Cylinder head and cylinder block |
| q | If renewed, refill system with fresh coolant. |
| 17 - | Radiator for engine coolant |
| q | Removing and installing → Chapter. |
| q | If renewed, refill system with fresh coolant. |
