A4 Mk2
|
WARNING
| 1 - | Port separator plates |
| q | Removable |
| q | Check for damage and correct fitting |
| 2 - | Sleeve |
| q | May remain lodged in cylinder head when high-pressure pump is removed; it can be removed |
| q | Sleeve must be at lowest point when installing high-pressure pump (rotate camshaft as required). |
| q | Removing and installing → Chapter |
| 3 - | O-ring |
| q | Renew |
| 4 - | Mechanical single-plunger high-pressure pump |
| q | An electric fuel pump (fitted in fuel tank) supplies fuel to the mechanical high-pressure pump at a pressure of approx. 6 bar. |
| q | When installing the high-pressure fuel pump, it is essential to ensure that no dirt enters the fuel system. |
| q | The fuel system must not be under pressure; procedure for reducing fuel pressure → Chapter |
| q | Fuel pipes must be free of tension when installed. |
| q | Sleeve must be at lowest point when installing high-pressure pump (rotate camshaft as required). |
| q | Removing and installing → Chapter |
| 5 - | Fuel pressure regulating valve -N276- |
| 6 - | Fuel pressure sender for low pressure -G410- |
| q | 15 Nm |
| 7 - | Securing bolts for high-pressure pump |
| q | Torx bolts (3x) |
| q | 9 Nm |
| 8 - | Connection for fuel return pipe to fuel tank |
| q | Renew bolt |
| q | Tighten connecting piece to 40 Nm (always make sure that connecting piece is tightened to specified torque before installing fuel line) |
| q | Fuel line must be free of tension when installed (make sure all parts are clean); tightening torque: 25 Nm |
| 9 - | Fuel supply pipe to fuel rail |
| q | Tighten connecting piece to 30 Nm (always make sure that connecting piece is tightened to specified torque before installing fuel line) |
| q | Fuel line must be free of tension when installed (make sure all parts are clean); tightening torque: 30 Nm |
| 10 - | Bore in cylinder head for high-pressure pump |
| 11 - | Injectors |
| q | Renew O-rings |
| q | Ensure correct installation position. |
| q | Removing and installing → Chapter |
