Audi Q7 2007 Workshop Manual page 172

Audi Q7 2007 !
6
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
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Unscrew bleeder screw -arrow- at front of engine.
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Fill up with coolant until it comes out at bleeder hole with
no air bubbles.
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Close the bleeder screw.
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On vehicles with auxiliary heater, switch heater on (for
about 30 seconds) and then off again.
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Tighten filler cap on expansion tank.
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Start engine.
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Set heater/air conditioner (front and rear) to "HI".
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Run the engine for 3 minutes at 2000 rpm.
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Allow the engine to run at idling speed until the two large
coolant hoses at main radiator become warm.
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Run the engine for 1 minute at 2000 rpm.
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Switch off ignition and allow to cool down.
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Check coolant level.
•
The coolant level must be at the MAX marking -arrow-
when the engine is cold.
•
The coolant level can be above the MAX marking when the
engine is warm.
Tightening torque
Component
Bleeder screw to coolant pipe
166
Repair Group 19 – Cooling
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