A5
Note
|
1 - | Bolt |
q | 10 Nm |
2 - | High-pressure pipe |
q | 25 Nm |
q | Between high-pressure pump and fuel rail |
3 - | Fuel return lines |
q | To fuel tank |
q | Fuel return line must not be kinked, damaged or clogged |
q | The fuel return lines must not be dismantled; if necessary they must be renewed complete with pressure retention valve |
q | The pressure retention valve maintains a residual pressure of approx. 10 bar in the return lines |
q | This residual pressure is required for the control function of the injectors |
q | Checking pressure retention valve → Chapter |
q | After replacement, engine must be run at idling speed for approx. 2 minutes to bleed fuel system. Then check fuel return lines for leaks |
4 - | Bolt |
q | 10 Nm |
5 - | High-pressure pipes |
q | 25 Nm |
q | Between fuel rail and injectors |
q | Do not interchange |
q | Install free of stress |
6 - | Fuel pressure regulating valve -N276- |
q | 80 Nm |
q | Cannot be re-installed |
q | Removing and installing → Chapter |
7 - | Fuel rail |
q | Removing and installing → Chapter |
8 - | Fuel supply line |
9 - | High-pressure pump |
q | With fuel metering valve -N290- (do not open) |
q | After renewing, first fuel filling operation MUST be performed (it is important not to allow pump to run while it is still empty) → Chapter |
q | Removing and installing → Chapter |
10 - | Bolt |
q | 20 Nm |
q | Turn long bolts 180° further |
q | Turn short bolts 90° further |
11 - | Bolt |
q | 20 Nm |
12 - | Toothed belt sprocket for high-pressure pump |
13 - | Nut |
q | 95 Nm |
14 - | Hub |
q | With sender wheel |
q | Use counterhold tool -T10051- to loosen and tighten |
q | To remove, use puller -T40064- |
15 - | Fuel pressure sender -G247- |
q | 100 Nm |
q | Removing and installing → Chapter |
16 - | Bolt |
q | 22 Nm |
17 - | Clamping piece |
q | If they are to be re-installed, the injectors and clamping pieces must always be re-fitted on the same cylinder. |
q | When an injector is renewed, the corresponding clamping piece must be renewed at the same time |
18 - | Hexagon flange nut |
q | For clamping piece |
q | 10 Nm |
19 - | Cover for injector |
20 - | Bolt |
q | 5 Nm |
21 - | Injector |
q | If they are to be re-installed, the injectors, high-pressure fuel pipes and clamping pieces must always be re-fitted in their original positions (i.e. on the same cylinder). |
q | Removing and installing → Chapter |
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