A5
Fuel rail - exploded view |
1 - | Injector |
q | With combustion chamber ring seal (teflon ring seal): always renew |
q | Renew O-rings |
q | Ensure correct installation position. |
q | Removing and installing → Chapter |
2 - | Support ring |
3 - | Fuel rail |
q | Removing and installing → Chapter |
q | 10 Nm |
4 - | High-pressure pump |
q | With fuel pressure regulating valve -N276- |
q | An electric fuel pump (fitted in fuel tank) supplies fuel to the mechanical high-pressure pump |
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 when installing the high-pressure pump; procedure for reducing fuel pressure → Chapter |
q | Fuel lines must be free of tension when installed. |
q | Removing and installing → Chapter |
5 - | Roller tappet |
6 - | Fuel pressure regulating valve -N276- |
7 - | Bolts for high-pressure pump |
q | Hand-tighten in diagonal sequence, then tighten to 5 Nm and finally tighten to 20 Nm |
8 - | Connecting piece for fuel supply line at fuel rail |
q | Renew |
q | 40 Nm |
9 - | Union nut for fuel supply line |
q | 20 Nm |
10 - | Air flow control flaps (intake manifold flaps) |
11 - | Gasket |
q | Renew |
12 - | Intake manifold |
q | Removing and installing → Chapter |
13 - | Vacuum unit for air flow control flaps |
14 - | Throttle valve module -J338-, throttle valve drive for electric throttle -G186- |
q | Throttle valve drive angle sender 1 for electric throttle -G187- and throttle valve drive angle sender 2 for electric throttle -G188- |
q | Throttle valve module -J338- must be re-adapted to engine control unit -J623- each time it is removed, installed or renewed; see „Guided Functions“ |
q | 7 Nm |
15 - | Bolts for intake manifold |
q | 9 Nm |
16 - | Intake manifold flap potentiometer -G336- |
q | Intake manifold flap potentiometer -G336- must be re-adapted to engine control unit -J623- if it has been renewed; see „Guided Functions“. |
q | After intake manifold flap potentiometer -G336- or intake manifold has been removed or installed intake manifold flap potentiometer -G336- must always be adapted to engine control unit -J623-. Use vehicle diagnostic tester to do so. |
17 - | Fuel pressure sender -G247- |
q | 27 Nm |
q | Lubricate threads lightly with clean engine oil |
q | Always renew connecting piece and tighten to 40 Nm |
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