Golf Mk4
| Assembly overview - parts of cooling system - engine side |
Note| Coolant hose schematic diagram → Chapter. |
| 1 - | To top of expansion tank |
| 2 - | Throttle valve module -J338- |
| q | Heated by coolant. |
| q | Clean → Chapter |
| q | If renewed, adapt engine control unit to throttle valve module → Vehicle diagnosis, testing and information system VAS 5051. |
| 3 - | O-ring |
| q | Renew if damaged. |
| 4 - | Connections for heat exchanger |
| 5 - | Connector |
| q | 4-pin. |
| q | Coolant temperature sender -G62- contacts gold-plated. |
| 6 - | Coolant temperature sender -G62- |
| q | For engine control unit. |
| q | With coolant temperature gauge sender -G2-. |
| q | If necessary, release pressure in cooling system before removing. |
| 7 - | Retaining clip |
| q | Check for secure seating. |
| 8 - | Shaped hose to → Item. |
| 9 - | 25 Nm |
| 10 - | Coolant pipe |
| 11 - | 10 Nm |
| 12 - | To bottom of expansion tank |
| 13 - | Shaped hose to → Item. |
| 14 - | Connection |
| 15 - | To top of radiator |
| 16 - | To bottom of radiator |
| 17 - | Oil cooler |
| q | Ensure clearance to adjacent components. |
| q | See note → Chapter. |
| 18 - | 15 Nm |
| 19 - | Connection |
| 20 - | Thermostat |
| q | Checking: Heat thermostat in water. |
| q | Opening begins at approx. 86 °C. |
| q | Opening lift min. 7 mm. |
| q | Removing and installing → Chapter. |
| 21 - | Toothed belt |
| q | Mark direction of rotation before removing. |
| q | Check for wear. |
| q | Do not kink. |
| q | Removing, installing and tensioning → Chapter. |
| 22 - | Coolant pump |
| q | Check for ease of movement. |
| q | If damaged or leaking, renew complete. |
| q | Removing and installing → Chapter. |
| 23 - | 15 Nm |
| 24 - | Rear toothed belt guard |
| 25 - | 20 Nm |
