Bleed Cooling System

WARNING: This page is about a different car, the 2022 Audi A6 Quattro and 2021 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Safety Gloves
Protective Eyewear

Procedure

Fig 1: Coolant Expansion Tank

Courtesy 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, check the coolant level and fill with coolant. Refer to COOLANT LEVEL, CHECKING AND FILLING .

-- Install the noise insulation. Refer to OVERVIEW - NOISE INSULATION .