Polo Mk4
| Injection components - remove and install |
| 1 - | Intake manifold (upper part) |
| q | Disassemble and assemble → Chapter. |
| 2 - | For the cylinder head cover. |
| q | Connection for the engine block vent. |
| 3 - | Air duct |
| 4 - | Connector |
| q | 80-pole. |
| q | For the Engine control unit -J623-. |
| q | Connect or disconnect the connector only with ignition switched off. |
| q | Unlock to disconnect. |
| 5 - | Engine control unit -J623- |
| q | In case of replacement, the Immobiliser control unit -J362- → Chapter must be adjusted. |
| 6 - | Air filter |
| q | Remove and install → Chapter. |
| 7 - | 10 Nm |
| 8 - | Connector |
| q | 2-pole. |
| q | For the Coolant temperature sensor -G62-. |
| q | Gilded contacts. |
| 9 - | Coolant temperature sensor -G62- |
| q | For the Engine control unit -J623-. |
| q | If necessary, depressurize the cooling system prior to removal. |
| 10 - | Sealing ring |
| q | Replace. |
| 11 - | Connection nozzle |
| 12 - | Clip |
| q | Check firm fitting. |
| 13 - | Connector |
| q | 3-pole. |
| q | To Engine speed sensor - G28-. |
| 14 - | Engine speed sensor -G28- |
| 15 - | Lambda probe -G39-, 50 Nm |
| q | Installation location: on the exhaust manifold. |
| q | Lubricate only the thread with High-temperature paste -G 052 112 A3-; High-temperature paste -G 052 112 A3- must not reach the grooves on the body of Lambda probe -G39-. |
| q | Remove and install with the Set of sockets for Lambda probe -3337-. |
| q | Supply to heat the Lambda probe -G39- through the Fuel pump relay -J17-. |
| 16 - | Connector |
| q | 4-pole. |
| q | Black. |
| q | To theLambda probe -G39-Lambda probe heating -Z19-. |
| q | Contacts 3 and 4 gold plated. |
| 17 - | 20 Nm |
| 18 - | Sealing ring |
| q | Pay attention on the installation position. |
| q | Replace when damaged. |
| 19 - | Intake manifold lower part |
| q | Disassemble and assemble → Chapter. |
| 20 - | Return hose |
| q | With blue marking. |
| q | Fasten with spring clamps. |
| q | Pay attention on firm fastening. |
| q | From the fuel filter. |
| 21 - | Supply hose |
| q | With white marking. |
| q | Secure with spring clamps. |
| q | Pay attention on firm fastening. |
| q | From the fuel filter. |
| 22 - | Sealing ring |
| q | Replace when damaged. |
| 23 - | 8 Nm |
| q | To fasten the upper part of the intake manifold. |
