Leon Mk1
| Parts of cooling system - engine side, engine code AJH |
| 1 - | 15 Nm |
| 2 - | To turbocharger |
| q | Coolant hose schematic diagram → Chapter. |
| 3 - | Coolant circulation pump -V50- |
| q | Black 2-pin connector. |
| q | Checking → Chapter. |
| 4 - | Thermostat |
| q | Checking: heat thermostat in water. |
| q | Opening begins approx. 87 °C |
| q | Ends at approx. 102 °C. |
| q | Opening lift min. 7 mm. |
| 5 - | O-ring |
| q | Renew. |
| 6 - | Connection |
| 7 - | To heat exchanger |
| q | Coolant hose schematic diagram → Chapter. |
| 8 - | To rear heat exchanger |
| q | Only vehicles with optional equipment. |
| q | Location: in rear left wheel housing. |
| 9 - | Securing clip |
| q | Check for secure seating. |
| 10 - | Coolant temperature sender -G62- |
| q | Blue, 4-pin |
| q | With coolant temperature sender -G2-. |
| q | For engine control unit. |
| q | If necessary, release pressure in cooling system before removing. |
| q | Checking → Rep. Gr.01. |
| 11 - | Connector |
| 12 - | Thermal switch for air conditioning shut-off -F163- and Thermal switch for radiator fan third speed -F165- |
| q | Brown, 4-pin |
| q | If necessary, release pressure in cooling system before removing. |
| q | Vehicles with air conditioner → Rep. Gr.87. |
| q | Vehicles without air conditioner, blanking plug. |
| 13 - | 10 Nm |
| 14 - | Air conditioning system coolant temperature sender -G110- |
| q | 2-pin. |
| q | If necessary, release pressure in cooling system before removing. |
| q | Vehicles with air conditioner → Rep. Gr.87. |
| 15 - | Bracket |
| 16 - | To top of radiator |
| q | Check for secure seating. |
| q | Coolant hose schematic diagram → Chapter. |
| 17 - | Lower coolant hose |
| q | Check for secure seating. |
| q | Coolant hose schematic diagram → Chapter. |
| 18 - | Oil cooler |
| q | Dismantling and assembling → Chapter, Disassembling and assembling oil filter bracket: engine code AJH. |
| 19 - | From rear heat exchanger |
| q | Only vehicles with optional equipment. |
| q | Location: in rear left wheel housing. |
| 20 - | 20 Nm |
| 21 - | Coolant pipe |
| q | Coolant hose schematic diagram → Chapter. |
| 22 - | Cap |
| q | Check using cooling system tester -V.A.G 1274- and adapter for cooling system tester -V.A.G 1274/9-. |
| q | Pressure relief valve must open at between 1.4...1.6 bar. |
| 23 - | Seal |
| q | Observe installation position on cap |
| q | Renew if damaged. |
| 24 - | Expansion tank |
| q | Test for leaks in cooling system using cooling system tester -V.A.G 1274- and adapter for expansion tank -V.A.G 1274/8-. |
| q | Observe markings → Chapter Draining and filling coolant |
| 25 - | From heat exchanger |
| q | Coolant hose schematic diagram → Chapter. |
| 26 - | Union, 30 Nm |
| q | For coolant supply pipe. |
| 27 - | Coolant supply pipe |
| q | For turbocharger |
| q | Coolant hose schematic diagram → Chapter. |
| 28 - | Coolant pump |
| q | Check for ease of movement. |
| q | If damaged or leaking, renew complete. |
| q | Removing and installing → Chapter. |
| 29 - | Toothed belt |
| q | Mark direction of rotation before removing. |
| q | Check for wear |
| q | Do not kink |
| q | Removing, installing and tensioning → Chapter. |