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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Engine Mechanical >> Cooling Fan >> Cooling System 2.0L (DMSA) >> 19 Cooling System >> Cooling System/Coolant >> Coolant, Draining And Filling >> Bleed Cooling System. >> Notes

Bleed Cooling System.: Notes

Special tools and workshop equipment required 

Procedure 

Fig 1: Coolant Expansion Tank
GWWA19-12304Courtesy of AUDI OF AMERICA, LLC

-- Tighten the cap -1- on the coolant expansion tank until it locks into place.

-- Start the engine.

Duration Engine Speed Conditions
Three minutes 2000 RPM
  • A/C system "OFF", the LED in the AC  button does not turn on
  • Heater on "HI", blower speed as low as possible (= 0)
Until both large coolant hoses on the radiator are warm Idle
  • A/C system "OFF"
  • Heater "HI"
2 Minutes 2000 RPM
  • A/C system "OFF"
  • Heater "HI"

-- Turn off the engine.