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SEAT Workshop Service and Repair Manuals

Nozzle units / high-pressure reservoir > < Engine control unit
Fuel system: Assembly overview
Fuel system: Assembly overview
Filling, bleeding fuel system → Chapter
Check fuel system for leaks → Chapter
  WARNING
t  First read through the rules for cleanliness and the instructions for working on the fuel system → Chapter.
t  Follow these instructions and rules for cleanliness before starting work and while working on the fuel system.
t  If components of the fuel system between the tank and the high-pressure fuel pump are removed or renewed, the fuel system must be filled to be bled → Chapter. (It is important not to allow the high-pressure pump to run while still empty.)
  Caution
When installing a new partial engine, the clamping pieces of the injector must be tightened to the specified tightening torque following installation of the high pressure lines → Chapter. The clamping pieces are supplied tightened »hand tight« so that the position of the injectors can be adjusted during the installation of the high pressure lines. Non-observance of these details may lead to damage to the engine.
To prevent the high-pressure fuel pump from running while it is empty and to ensure that the engine starts quickly after parts have been renewed, it is important to observe the following:
t  If fuel system components between fuel tank and fuel high-pressure pump are removed or replaced.
t  If a fuel pump, fuel line or fuel filter is removed or replaced.
t  If the fuel high-pressure pump is removed or replaced.
–  Connect vehicle diagnosis tester.
–  Perform the function „Filling/bleeding high-pressure pump/fuel system“ in „Guided functions“ → Chapter.
   
1 - Fuel metering valve -N290-
q   Do not open
2 - High-pressure fuel pump
q   After renewing, a first fuel filling „must“ be performed (never allow pump to run while dry) → Chapter.
q   removing and fitting → Chapter
3 - Fuel pressure sender -G247-
q   Removing and installing → Chapter.
4 - Rail element (high-pressure reservoir)
q   removing and fitting → Chapter
5 - Fuel pressure regulating valve -N276-
q   Replace
q   check → Chapter
q   removing and fitting → Chapter
q   80 Nm
6 - Injectors (solenoid valve injectors)
q   Injector, cylinder 1 -N30-
q   Injector, cylinder 2 -N31-
q   Injector, cylinder 3 -N32-
q   Removing and installing → Chapter.
7 - Fuel return lines
q   Do not dismantle the fuel return lines.
8 - Fuel tank
q   With fuel delivery unit -G6-.
q   If fitted: Additional fuel filter and integrated pressure regulating valve
9 - Fuel supply and return line separating points
q   On bottom right of fuel tank.
10 - Fuel filter:
q   Assembly overview - fuel filter → Chapter.
q   removing and fitting → Chapter

   

Nozzle units / high-pressure reservoir > < Engine control unit