audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Components of injection system > < Removing and installing engine speed senderG28

A5

  • Power unit
  • TDI injection and glow plug system (4-cyl. 2.0 ltr. 4-valve common rail)
  • Fuel preparation system Diesel injection
  • High-pressure pump

Removing and installing high-pressure pump
Removing and installing high-pressure pump
  Caution
t  Always observe rules for cleanliness and instructions for working on fuel system → Chapter.
t  Follow these instructions and rules for cleanliness before starting work and while working on the fuel system.
t  Running when dry causes irreparable damage to high-pressure pump.
t  The high-pressure pump must first be filled with fuel before the engine is started. The high-pressure pump must not be allowed to run while still empty. First fuel filling → Chapter.
Removing
–  Remove toothed belt from camshaft and high-pressure pump → Rep. gr.15.
–  Unplug electrical connector at fuel metering valve -N290-.
   
–  Unscrew union nuts at high-pressure pump -1- and fuel rail -5- and remove high-pressure fuel pipe -4-.
–  Remove bolts -arrows- for high-pressure fuel pipe.
  A23-10273
–  Pull fuel pipe connections -2 and 3- off high-pressure pump.
–  Remove bolts -arrows- securing the two fuel pipes.
  Note
Do not bend fuel lines.
–  Remove toothed belt sprocket from high-pressure pump.
  A23-10272
–  Counterhold hub of high-pressure pump using counterhold tool -T10051- and unscrew securing nut -1-.
  N23-10221
–  Apply puller -T40064- with thrust piece -T40064/1- and pin -T40064/2- as shown in illustration and pull hub off high-pressure pump. If necessary, counterhold using an open-end spanner (24 mm).
  N23-10372
–  Unscrew securing bolts -arrows- for high-pressure pump.
–  Carefully take out high-pressure pump.
Installing
Install in reverse order.
l  Tightening torques: refer to exploded view of fuel system → Chapter
–  Install toothed belt for high-pressure pump → Rep. gr.15.
–  Install high-pressure pipes → Chapter.
  Caution
t  The high-pressure pump must first be filled with fuel before the engine is started. The high-pressure pump must not be allowed to run while still empty. First fuel filling → Chapter.
t  Running when dry causes irreparable damage to high-pressure pump.
  N23-10223

  • Power unit
  • TDI injection and glow plug system (4-cyl. 2.0 ltr. 4-valve common rail)
  • Fuel preparation system Diesel injection
  • High-pressure pump

Components of injection system > < Removing and installing engine speed senderG28