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Checking fuel system for leaks - vehicles with unit injector engine > < Bleeding fuel system

A3 Mk2

Bleeding fuel supply line leading to metering pump - vehicles with auxiliary heater
Bleeding fuel supply line leading to metering pump - vehicles with auxiliary heater
  Note
On vehicles with auxiliary heater, it is important to bleed the fuel supply line leading to the metering pump after working on the fuel delivery unit.
Special tools and workshop equipment required
   
t  Diesel extractor -VAS 5226-
  W00-1187
t  Hand vacuum pump -VAS 6213-
  W00-10259
Procedure
l  Auxiliary heater switched off.
–  Connect diesel extractor -VAS 5226- to compressed air.
–  Remove fuel supply line -2- from fuel tank at metering pump -1-.
–  Connect diesel extractor -VAS 5226- to fuel supply line with adapter from hand vacuum pump -VAS 6213- and bleed fuel supply line by operating extractor briefly.
–  Re-attach fuel supply line to metering pump.
–  Switch auxiliary heating on and run at full load for approx. 10 minutes.
  A20-10396

Checking fuel system for leaks - vehicles with unit injector engine > < Bleeding fuel system