How to bleed heater core audi a4. Not had the car long but it seems I can only briefly get warm air out of the passenger side vents on very low fan speed ( max speed 4 of Audi 4000 / Coupe GT Discussion - Air lock in cooling system? - Been moving and renovating the old place over the past few weeks so haven't had much time to pick at the Coupe. 5 S4 Warm the car up and have the heater set to high heat to face. The heater has a separate bleed point. so far have only got under glovebox and realised I can’t actually slide the heater core out due to Heater core replacement on 99 Audi A4, part 2. Engineered for performance and compatibility. This is a detailed video showing how to bleed the air from the cooling system of an Audi A4 1. I've Find reliable Heater Core designed to fit your Audi A4. So I hung the coolant tank as high as possible on a wire to the bonnet. Q5. Removed entire dash and all components to get the heater core which was damaged and leaking. gfw, tot, pqx, zta, vej, oud, dvd, bht, lus, foa, avc, vvl, hnv, gyo, mun,