Leon Mk2
| Dismantling and assembling heater unit -D4W- (diesel) |
| 1 - | Water jacket cover |
| 2 - | Bolt M5×12 |
| 3 - | Heat exchanger |
| q | Clean inside and outside with brass wire brush (spark plug brush). |
| q | Note installation position → Fig.. |
| 4 - | O-ring |
| q | Renew |
| q | Moisten with coolant additive G12 when installing. |
| 5 - | Seal |
| q | Always renew after dismantling. |
| 6 - | Combustion chamber with flame tube |
| q | Clean inside and outside with brass wire brush (spark plug brush). |
| q | Combustion chambers for petrol and diesel are different. |
| 7 - | Combustion air blower cover |
| 8 - | Bolt M5×12 |
| 9 - | Bolt M4×10 |
| 10 - | Socket head screw M5×65 |
| q | 6 Nm |
| 11 - | Socket head screw M5×16 |
| q | 6 Nm |
| 12 - | Heater control unit -J162- |
| q | Removing → Chapter |
| 13 - | Combustion air blower -V6- |
| q | Replacing → Chapter. |
| q | Do not dismantle further |
| 14 - | Cover |
| 15 - | Wiring harness |
| q | Fold open connector housing to enable sockets to be pressed out. |
| q | Pin assignment: |
| q | Combustion air blower -V6-: chamber 3 - brown, chamber 4 - black. |
| q | Flame monitor -G64-: chamber 13 - brown, chamber 14 - blue. |
| q | Overheating sensor -G189-: chambers 9 + 10 - red. |
| q | Coolant temperature sender for heater -G241-: chambers 11 + 12 - blue. |
| q | Glow plug for heater -Q9-: chamber 5 - white, chamber 6 - brown. |
| 16 - | Seal |
| q | Always renew after dismantling. |
| 17 - | Flame monitor -G64- |
| q | Removing → Chapter |
| q | Checking → Chapter |
| 18 - | Glow plug for heater -Q9- |
| q | Removing → Chapter |
| q | Rated voltage: 8 volts |
| q | Clean glow plug with brass wire brush (spark plug brush). |
| q | 6 Nm |
| q | Check under rated voltage 8 V. |
| 19 - | Water jacket |
| q | Clean inside and outside with brass wire brush (spark plug brush). |
| 20 - | Overheating sensor -G189- |
| q | Removing → Chapter |
| q | Checking → Chapter |
| 21 - | Coolant temperature sender for heater -G241- |
| q | Removing → Chapter |
| q | Checking → Chapter |
| 22 - | Spring |
| q | Do not bend further. |
| q | Renew if damaged. |
| 23 - | Screw M5×16 |
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