Question about 2001 Audi A6

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Engine overheats and heater blowing cold air

Audi a6 2001 quattro 2.8 AWD 3 weeks ago my car spilled all coolant liquid on the streets while I was driving and the engine overheated. I then changed the radiator because it had leaks and the coolant reservoir completely. And even then the heater would blow cold air. After I replaced the parts I still get cold air and engine still overheats. I don`t seem to lose coolant but after it boils it goes down.. And after overheating when I stop the car the big hose that joins coolant reservoir and radiator seems to kick and makes a kicking noise for about a minute. It sounds like small knockings..

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  • Audi Master
  • 1,632 Answers

You have air trapped in system , change thermostat , bleed air from system , let it run hot while adding coolant with blower full blast on all front and rear heaters .

Posted on Jan 23, 2013

  • shaan omar Jan 23, 2013

    Hi thanks for the info, I can`t change thermostat myself so will need to take it to mechanic .. how to bleed air from system though ? Or should I just bleed air from my system without changing the thermostat?

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Posted on Jan 02, 2017

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SOURCE: coolant in coolant reservoir did not fill low level in radiator

you must drain air out of system
so when engine is warmed up, just unscrew slightly the thermo time switch which is the highest sensor and unit in cooling system besides the reservoir, until alittle air releases then when antifreeze starts coming out then retighten to specs. BE VERY CAREFUL !!!! LOOSEN VERY SLOWLY AND NOT COMPLETELY REMOVE FOR THIS CAN CAUSE BURNS. MIGHT WANT TO USE A RAG AROUND SENSOR. If this doesnt solve it then make sure you have the correct rad. cap. Also that the filling hose is not clogged as well as the little port on radiator.

Posted on Feb 19, 2009

  • 1 Answer

SOURCE: 1997 audi A4 heater blowing cold air

You probably have a leak in your oil cooler. This is causing the oil to bleed into your cooling system causing the "thick brown liquid". This in turn will also cause your engine to over-heat since the cooling system is contaminated.

Posted on Mar 06, 2009

  • 88 Answers

SOURCE: 1993 audi 90 CS overheating

be careful overheat expensive dont drive ok let it cool fill with water let idle watch gaugers and if it gets to three quarters on gauge and no fan problem if you have alight let run half hour from cold no fam same look for stuff unpluged let me know

Posted on May 27, 2009

messstat
  • 365 Answers

SOURCE: looking for procedure to properly bleed an audi A4

You didn't say what year the car is or what other diagnostics you've done lately...My guess is the radiator core is plugged...If you want to tackle it yourself, buy a Chiltons repair manual at AutoZone or NAPA stores ($25). I suspect you'll have to order the manual.
Good Luck

Posted on Jun 26, 2009

  • 82 Answers

SOURCE: Car is overheating and coolant seems to boil in

check the thermostat good luck

Posted on Dec 10, 2010

Testimonial: "Thanks very much . I will try this asap."

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Yes, replace the thermostat. Then you need to 'burp the coolant system'. Your car has all the hallmarks of air in the system, especially a heater that is cold. This is because there is no water in the heater matrix. This is why it overheats. The system must be full and with no air to circulate correctly through the radiator.

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