Question about 2004 Audi A4

1 Answer

Audi A4 coolant problem topping up coolant but still over heating and more coolant needed

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 2,049 Answers

Many cars have a bleeder valve to let out air pocket from the cooling system. Fill the radiator, with the cap off, let it idle at about 1500-2000 rpm's until it reaches normal operating temp. on the gauge, then the thermostat will open allowing the coolant to circulate throughout the engine and radiator. any air will then be gone after about 10 minutes at a fast idle. Top off the coolant, replace cap and recheck the level after a short drive of a few miles and has time to cool.
If there is enough trapped air in the system, you will have no heat. The heater box loves to trap a lot of air in it as its like a tiny radiator itself.

Posted on Sep 23, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

The light is flashing on the top left of the 4 squares. Its 1996 Audi A4 1.8 auto. What does it mean

Is this you instrument cluster? vtraudt image
If so, top left would be coolant temperature warning light.

What is the coolant temp gauge reading?

I would suspect faulty coolant temp sensor.
Also check if your coolant reservoir sensor (plugged into the bottom of you coolant tank) is plugged in (I often forget to plug it back in; the retainer also easily breaks and the plug can slip out).

Jan 28, 2015 | 1996 Audi A4

1 Answer

What kind of antifreeze can i use for2002 audi a4

ONLY what it says in your owners manual

Only mix with distilled water on ANY vehicle

Most likely you will have to go to a dealer for the
G12 type for audi or vw

If you used green on a 13 year old vehicle, you
will be doing lots of replacing of parts, in years to come

Learn the hard way, when all you need to do, is follow
the manufactures manuals, you get when your buy these

The heat issues are NOT related to the coolant your using

Diagnose the problems-- as winter is coming soon

Oct 08, 2014 | 2002 Audi A4

1 Answer

Where is the engine coolant temperature switch located

Look in area around the top radiator hose on the head/block and the sensor will be square in shape , probably red in colour and have a connection with 2 wires in it.. failing that see the service dealer or a shop that specialises in repairs your vehicle..

Oct 05, 2014 | 1998 Audi A4

1 Answer

My audi a4 heating works but not Ac?

You may just need to refill the coolant if your check engine is on most likely is you catalyst

Jul 12, 2014 | 2001 Audi A4

1 Answer

I have a 1999 Audi A4 Avant, I keep having to top up the water reservoir, what could the problem be?

If you are talking about the reservoir for the radiator, the radiator pulls coolant in from the tank when it is low.
If you are adding coolant - water every week and there are no external leaks, the engine is burning the coolant out the exhaust pipe.
Usually a leaking head gasket - intake gasket or cracked head.

Aug 18, 2012 | 1999 Audi A4

1 Answer

Audi a4 1997 keeps overheating after bout 10miles (raises upto 100-110 degrees) Checked fan and still working and water circulating fine so could u provide any support in whats causing the problem?

can be loosing water or not holding pressure[coolant bottle or cap],top gasket,crack in block,oil cooler leaking into coolant,faulty heat gauge or sensor.hope this helps

Jul 06, 2011 | 1997 Audi A4

1 Answer

I have an A4 AUDI 1.8T my car is over heating , oil is finding its way into the coolant and the fan is not coming on, only when i put on the air condition the two fans come on.I also have an oil leak,...

Oil into coolant is almost always cylinder head gasket problem. Sometimes head cracked, Check if head is "tourqued" correctly. If it is remove and do a top overhaul.

May 17, 2017 | 2002 Audi A4

1 Answer

My Audi A4 2001 4 cyl doesn't have heat but car got overheating with about 10 miles diving, Any help?

You likely have low coolant causing a large air pocket. This will cause the sensor to pick up the hot steam but the lack of flow through the heater core will not heat up the interior.

Feb 21, 2011 | 2001 Audi A4

1 Answer

Leaking coolant and over heating

Is it overheating because there is no coolant? Weak point of that Audi is coolant tank on the right side of the engine, which leaks easily, but it's cheap to replace.

Aug 13, 2010 | 2005 Audi A4

1 Answer

Audi a4 heating

common water pump failure,the old type have plastic impellors the new ones are steel,the plastic ones break and wont push the coolant round

Jan 02, 2009 | 2002 Audi A6

Not finding what you are looking for?
2004 Audi A4 Logo

668 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audi Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers


Level 3 Expert

76673 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14380 Answers

Are you an Audi Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides