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Removing and installing fuel filter - vehicles with 4-cylinder engine (unit injector) > < Overview of fuel filter - vehicles with 4-cylinder engine (unit injector)

A4 Mk1

Fuel supply system - Diesel engines
Servicing fuel filter
Connection diagram for fuel and coolant hoses - Vehicles with 4-cylinder engine (unit injector)
 
A20-0738
  • Fuel filter
  • Fuel return hose
    • ◆ From tandem pump
    • ◆ Blue marking
    • ◆ Clipped onto lower coolant pipe
  • Fuel temperature sender
    -G81
    • ◆ Checking:

=> TDI diesel injection and glow plug system (4-cyl. unit injector); Repair group 23; Testing control unit input values; Testing fuel temperature sender -G81
 
A20-0738
  • Fuel return hose
    • ◆ To fuel tank
    • ◆ Blue marking
    • ◆ Clipped onto bulkhead
  • Fuel supply hose
    • ◆ To tandem pump
    • ◆ White marking
  • Fuel supply hose
    • ◆ From fuel tank
    • ◆ White or with white marking
    • ◆ Clipped onto bulkhead
  • Non-return valve
    • ◆ Installation position: Arrow points towards tandem pump
  • Coolant return hose
    • ◆ To cooler
  • Coolant supply hose
    • ◆ From cooler

Removing and installing fuel filter - vehicles with 4-cylinder engine (unit injector) > < Overview of fuel filter - vehicles with 4-cylinder engine (unit injector)