Question about 2006 Audi A3

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Air lock in coolant system

Think i,ve got an airlock in my 98 1.6 a3...the temp gauge hit the roof and only blows cold air from the fan. tried idling after topping up with g12 but no bubbles rising in header tank. any pointers would be greatly appreciated.

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  • william_mcmi Jan 11, 2009

    thanks

  • william_mcmi Jan 11, 2009

    thanks for your help,i thought these were supposed to stick open to prevent damage? will check it out.

  • Thomas F. Schneider May 11, 2010

    Let me see if I have this correct:


    Engine is very hot. Confirmed by the heat coming off the engine?
    Heater fan blowing cold air.
    No bubbles in coolant.


    Sounds more like no water pump action  to me. 
    Check for stuck thermostat in the closed position. 

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I think I would try getting the radiator flushed and cleaned. Check for blockage. Also you can change your thermostat. Last but not least check the expansion tank cap and make sure it is okay. If everything is okay the cold air could be because of a clog radiator core. Sometimes there could be a partial head gasket breech causing the presure to back up. Do a compression check for each cylinder.

Posted on Jan 23, 2009

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