Question about 1996 Audi A6

2 Answers

1996 1.8 ADR Engine Audi A6 overheating

I cooked it & have had the head skimmed re fitted & now the water system pressureised very quickly but the heater in the car was blowing cold even though it was set to hot do you think the thermostat is stuck & is it on the back of the head ? Thanks

Posted by on

  • Anonymous Mar 21, 2014

    how to fit belt



2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Expert
  • 59 Answers

Hi there, this could be a faulty thermostat but typically, these issues are caused by air locks in the heating system when the car cooling system is drained to take the head off.

The water pump may be working which is fine but there may be some big air bubbles in the pipes that carry the water from the engine to the heater matrix.

Have you tried without starting the car, taking off the water filler cap, not the coolant refill cap but the radiatpr cap. Not sure if this cap is actually on the radiator on the Audi or if there is one locatd closer to the thermostate housing, but once the cap is off top up the water to just below the neck and then squeeze the water hoses around the radiator to try and push water into the cooling system. You need to to squeeze quickly and with both hands to try and force water around the system and then slowly let the hose expand in your hands. Watch for bubbles coming out of the filler so that you can top up the water level again as it goes down. There will be a lot of bubbles if its really air locked and you may have to spend some time doing this. Keep toping up the water level though and once you can't seem to get any more bubbles out. Then if you can close the system again - i.e. put the radiator cap on and go for a ride. if possible find a steep incline where you can point the car up a steep incline and get the engine really reving to push the water round the system.

Go home - wait for the engine to cool and if the heater has not started to work on that trip, once the engine is cool, repeat the process with the hose squeezing to see if you can get more bubbles out, followed by toping up and so on.

If that really makes no improvement the worrys would be that your right that the thermostat could be bad although you should notice that with the temperature gauge moving up pretty rapidly and the car getting over hot if the thermostat is stuck shut. If its stuck open then it wouldn't stop the heater working it would just be slow to warm up.

It could also be the heater valve on the hot/cold switch where teh valve is not opening, and a last ditch issue would be that the water pump is not working.

My advise would be try and clear the air lock first. Also if you have a manual for the car (haynes manual), they normally talk to the correct way to refill the heating system to prevent the air locks. Some times there are venting points on the block that can be unscrewed to bleed the air out but for that you need the manual.

I hope that will at least help some - best wishes.

Posted on Aug 29, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 6 Answers

Thermostat is permanently closed because it broke apart and blocked the passage. Change thermostat and check if the IN and OUT hoses are connected to the heater correctly. it looks like there is non-return valve which does not allow water to flow into the heater.

Posted on May 17, 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.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer


Have the cylinder head 'skimmed".
You cant just replace it.

Jul 31, 2016 | 1996 Audi A4

1 Answer

1996 Chevy cavalier Over heats smells like exhaust coming from coolant reservoir any suggestions ?

It sounds like a head gasket failure or a possible cracked cylinder head.
The engine combustion exhaust gasses are leaking into the coolent system and causing the overheating.
Have you noticed a loss of coolent with no apparent leaks?

Try taking the coolent header tank cap off and placing your hand over it creating a seal. If after a few seconds you feel pressure building and when lifting your hand slightly you'll hear the pressure release as a hiss confirming either of the two I mentioned.
Only do this if the temperature is low or you could burn your hand.
If the engine has overheated badly it could of warped the head needing it to be skimmed if it's aluminium. Likewise if the engine block is aluminium also but them two are only likely if you cooked the engine so I would say firstly it's a failed head gasket.
I hope this helps you out.

Mar 13, 2016 | Cars & Trucks

1 Answer

1996 audi a6 quattro leaking and /or spewing antifreeze temperature light coming on

Well I guess you know the engine is overheating, this means death to the engine if you are driving it this way. Seek out a repair shop and have the problem diagnosed and hope you haven't blown out the engine head gaskets

Sep 20, 2012 | 2002 Audi A6

1 Answer

Where is the thermostat on a 96 audi a6

The thermostat on most internal combustion engines controls the flow of coolant to the radiator and this is fed into the top tank of the radiator.

The bottom hose is normally at the inlet to the coolant pump.

Vehicles with AC will have two radiators, and even some, a third for transmission or oil cooling but the largest of them will be the one handling engine cooling.

Locate the topmost hose of the radiator and simply follow it back toward the engine and it is normally connected to a dome-like fitting, under which you will find the thermostat.

If you are experiencing overheating though, it may not be a failed thermostat; this can be caused by a radiator blocked with debris, an internally collapsed hose and worst case, a failing head-gasket. The latter can fail in several places and overheating is often caused by the failure of it between coolant channels and one or more of the cylinders. This allows passage of hot combustion gases directly into the coolant flow.

Check the following: the overflow bottle for traces of oil contamination and possible odor of exhaust fumes, the oil dipstick for a milky deposit and when the engine is running, the overflow bottle for bubbles.

Jun 13, 2011 | 1996 Audi A6

1 Answer

Audi a6 2.8e keeps over heating the fan on the first speed does not come in.The water is pushing out the cap.Did replace the water pump,pressure cap,fan switch,bleed the system no air in system

Sounds as if the cylider head gasket may have blown. If the engine oil has changed to a grey colour, thats the problem. Even if the oil hasn't changed I'd suggest a cylinder compression test fromyour friendly motor machanic

Oct 02, 2010 | 2000 Audi A6

1 Answer

Still overheating after head is skimmed

waterpump? No movement of water/coolant, engine overheats. Engine overheats, warp heads. Next time you rip a head off, check gasket to see if head gasket failed or if there is a different cause to car overheating.

May 25, 2010 | 1999 Honda Civic

1 Answer

My audi a6 keeps overheating at leat thats what the gauge tells me. It only happens when you are doing 40 or more . When you free wheel the temp shoots back down rapid. Any ideas

another difficult one to diagnose without car in front of me iam afraid ,could be anything from a head gasket to a partially blocked rad caused by no ANTIFREEZE ,try it again and turn the heater on max heat and fan on max and see if runs hot then if its ok ,let engine cool and put about 200grms of caustic soda in rad and run it for half hour ,let it cool and flush out the system with a hose pipe .then refill with water and try another drive ,if its ok then refill with antifreeze ,if its not try the caustic again .if that doesnt work trade it in quick

Apr 12, 2009 | 2000 Audi A6

1 Answer

Overheating all components working


Jul 17, 2008 | 2002 Audi A6

Not finding what you are looking for?
1996 Audi A6 Logo

932 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audi Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

79186 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14406 Answers

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

Answer questions

Manuals & User Guides