A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Install the two coolant lines - B - and - C - with clips - A - to the heater core.
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Check position of both clips - A -. They must completely surround the flange at the heater core and coolant line and not make contact with other
components.
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Tighten bolts at clips - A - to 2.5 Nm.
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Make sure coolant hoses are properly connected to heater core. observe markings:
A. Supply hose from cylinder head
B. Return hose to water pump
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Reinstall components removed (with the exception of drivers storage compartment) in reverse order.
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Bleed coolant circuit.
NOTE:
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The arrangement of the coolant lines to the heater core of the air conditioner is such that the heater core must also be bled. Proceed as follows:
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Bleed coolant circuit.
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Switch off ignition.
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Carefully open cap at coolant reservoir (observe safety precautions for opening cap).
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Loosen clip at coolant hose - B -.
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Slide back hose - B - until hole in hose is no longer sealed off by line.
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Use cooling system tester V.A.G 1274/hand pump for example to increase pressure in coolant circuit.
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Bleed heater core by way of hose - B - until there are no bubbles in coolant emerging.
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Install coolant hose - B - and secure with clip.
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Replenish coolant if necessary.