A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
‹› The heat exchanger is designed for a specific coolant flow direction. Therefore, coolant hoses must be connected on the correct sides.
‹› Bleed coolant circuit.
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Clamp the coolant hoses - A - and - B - with hose clamps.
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Cover the area beneath connections for coolant hoses - A - and - B - e.g. with absorbent paper.
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Remove coolant hoses - A - and - B - from connections to A/C unit heat exchanger.
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Insert one section each of hose - A - and - B - on to both connections to heater core.
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Place a container - B - under the other end of the hose - C -.
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Using a compressed air gun - D -, carefully blow coolant out of heater core (into container - B -) via hose - A -.
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Loosen the grommet - H - from the plenum chamber rear wall and remove it from the heat exchanger coolant pipes.