Question about 2005 Audi A3

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A3 2.0 TDI changed radiator, how do you bleed the system

A3 05 2.0 TDI changed radiator, cannot find a bleed screw on any upper part of the system,how do you bleed the system?

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If you have no radiator cap that can be removed, you will probably have to do repeated cycles of engine temperature and just add coolant to the overflow until the engine stops draining it. This isn't like a hydraulic (brake) system so the chance of leaving bubbles behind is far less.
With a radiator cap, it's pretty simple; run the engine until the coolant is visibly circulating and add coolant as the level drops.

Posted on Oct 08, 2009

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When the car is cold, open the radiator cap and start the car. Turn the heater on to full blast hot. As the car warms up, the radiator will bubble and start pulling in the coolant. Add as necessary until it has reached normal operating temperature and starts to spit coolant back out. Close the cap and check the level again the next time your car is cold. If the level is good, you are all set. If not, repeat this process.

Hope this helps,
matt

Posted on Oct 08, 2009

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