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Engine temperature and warm up time

Discussion in 'Audi S4/A4/A4 Cab (B8 Chassis)' started by S.line, Dec 4, 2012.

  1. Necroscope
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    Necroscope Member

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    [Dec 20, 2012]
    You got it Dag ;)

    Joking apart get that stuck to the front of the rad, start her up, drive for a few mile, if you hit 90 degrees C, case solved!!!
    #41
  2. S.line
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    S.line Member

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    [Dec 20, 2012]
    Don't be soooo daft guys, in this weather it would get wet n fall off!! Besides my warranty would be then void as I've then modified the car......driving the car backwards is the only way forward me thinks :)
    #42
  3. dieseldoug
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    dieseldoug Member

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    [Dec 20, 2012]
    Hope everything turns out well on the 27th
    Blocking off the front was just a fun comment... but remember air intake is at the front also the aftercooler.
    #43
  4. S.line
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    S.line Member

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    [Dec 21, 2012]
    Me too doug. Otherwise ill have to get me socket set out n do it me self.

    Thinking about lease cars for the future.
    #44
  5. Necroscope
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    Necroscope Member

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    [Dec 21, 2012]
    Doug might have been joking, i wasnt though.

    Get a piece of card and slide it infront of the radiator. The card will stop the air flow through the radiator and regardless of if the stat is stuck open you will see a temperatue rise. If you get to the normal 90, pull it out again and if it drops back down to 70, then your stat is stuck open. You can then go back to the garage and get it swapped out with confidence that its not going to be at your cost.
    #45
  6. Zafi
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    Zafi Active Member

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    [Dec 21, 2012]
    Start the engine from cold and leave it in neutral.

    The temperature gauge should slowly rise and rise up to around 90, then as the thermostat opens it should level off or drop a little.

    Then after a while the temperature will start to rise again and reach a temperature where the fan will come on.

    Then the temperature should slowly drop and the fan will stop.

    Then it will cycle like this forever.

    If you then go for a drive, the temperature should not fall too far. If it does, the thermostat is stuck open.
    #46
  7. S.line
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    S.line Member

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    [Dec 21, 2012]
    How many of you guys have this car. 2008 a4 2.0 tdi 143? What are yours like?
    #47
  8. dieseldoug
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    dieseldoug Member

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    [Dec 21, 2012]
    .

    My A4 is January 2006 140hp, 43K power machine and fully original except I have had the battery changed under warranty, dealer S/H.
    This car will be departing soon for new A3, I hope this meets all the requirements....
    #48
  9. gregpot2000
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    gregpot2000 Member

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    [Dec 24, 2012]
    Hi, I have this car. And I do notice the engine cools down with light driving in cold weather. Such as long, steep, declines, the temperature dial moves right down. As soon I put the engine under any load again though it moves back up. I found it strange at first as previous cars I have had got Upto temperature and stay fixed there. If you are driving normally on a motorway and the engine won't reach temperature something is definitely wrong though
    #49
  10. S.line
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    S.line Member

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    [Dec 24, 2012]
    It's the stat I think. Stuck open or slow to react. Could be its just ****, made with cheap materials.....u seen the price of copper?!
    #50
  11. S.line
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    S.line Member

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    [Dec 27, 2012]
    Here's the latest. Another Audi garage says there is a problem. He asked my authorisation to check the water pump but I said its a warranty fault. Audi uk then phoned me and DIDN'T HAVE A CLUE WHERE SHE WAS nevermind be of help. She started saying it wasn't covered and I I had to pay then rather rudely hung up. (I recorded the call!) I then got a call back from the garage who now have authorisation to check the pump but nothing else. He also said he don't think the thermostat was changed??? The case continues!!
    #51
  12. n0v
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    n0v New Member

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    [Dec 27, 2012]
    You probably spoke to the same person that spoke to me about a query. Useless and rude to say the least. Not customer service in any way shape or form, hope you get it sorted :)
    #52
  13. S.line
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    S.line Member

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    [Dec 27, 2012]
    Was she called Nicola? A scouser?
    #53
  14. n0v
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    n0v New Member

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    [Dec 27, 2012]
    It was a while back so i cannot remember but if it was not then they have two rude customer service people. A shame really as their jobs are provided by people like us that buy Audis. I never considered BMW but may next time. Customer service is no.1 for me when an issue is present. They failed and should look to resolve it quickly, shame as i love my Audi.

    cheers

    n0v
    #54
  15. S.line
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    S.line Member

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    [Dec 28, 2012]
    The other audi garage found an air lock in the cooling system. You would think these cars would have an automatic bleed valve fitted on the top hose ?
    #55
  16. Artimus
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    Artimus Short Back

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    [Dec 28, 2012]
    Blimey, never saw that coming ...you'd think Audi would bleed it properly if they've opened up the middle of the system to remove a part for checking\replacing.
    #56
  17. S.line
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    S.line Member

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    [Dec 30, 2012]
    Question is, if this has been the problem all along and the stat was changed then the problem came back how is the air getting there?
    #57
  18. dieseldoug
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    dieseldoug Member

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    [Dec 30, 2012]
    Strange comment from the Audi dealership.
    If the car had any air lock after installing the stat, the car would have overheated as the cooling system is spec'd for around 10% in reserve for clogging and wear.
    My experience in engines with air lock will overheat quickly and throw the water out as the result, that's why you have the small hose attached to the expansion bottle to let any air out of the system during normal operation. This should have been addressed during the road test and checks after the job being completed.
    Air can only get in the cooling system if there is a leak in the compression/combustion cycle, again this will discolour the cooling water, anything else will result in water loss.
    I find it hard to understand if you drain 20 litres from a cooling system WHY only fill it with 18 litres this again is bad mechanics or people just not knowing.
    #58
  19. Spike86
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    Spike86 New Member

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    [Dec 30, 2012]
    Maybe the stealers never replaced it in the first place. Sounds like a stuck thermostat to me.
    temp should stay at a constant 90, uphill or down. Take it back to the stealerS and make them
    fix it.
    #59
  20. S.line
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    S.line Member

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    [Dec 31, 2012]
    Doug if it is the head gasket what do you think my chances are of having it replaced. The car was in warranty when I reported a problem but warranty is out now!
    #60
  21. Av4nti
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    Av4nti New Member

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    [Feb 3, 2013]
    Hi there, just joined the forum, and noticed your fault symptoms, I had similar on a Mk5 Golf GTI which I have had from new, just like many I assumed it was the thermostat remaining open, I had the stat replaced but the guy changing the stat said another item was was showing a slight leak, so he replaced that, looking at the stat, it looked closed just like the new one, anyways he replaced both and I'm pleased to say the engine reaches 90c on the dial again within 17 minutes and that is with sub or just above 0c ambient temperatures, I don't know what the part is called but here is a pic of it on the right

    [​IMG]
    #61
  22. pj123
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    pj123 Member

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    [Feb 20, 2014]
    Did you resolve your problem?

    I've just bought a 2008 avant 143 and have noticed mine takes a few minutes longer than expected to warm up, just over 10 minutes roughly. I will be changing the thermostat when i change the timing belt this year and expect this time will drop. Few comments on your problem having read this thread:

    - When the engine temp is within a normal range (approx 82 and 95 degrees) the pointer will point at 90. If the engine goes outside this range then the pointer starts to move. If you plug in VCDS whilst driving you will see this. In my old S3 you can display actual engine temp through the climate display and observe this. Thermostats actually have 87 degrees written on them but i think the germans think it is neater to tell you its 90 degrees.

    - The symptoms point towards thermostat failure. People do experience new thermostats failing from new so this is a possibility if it has already been changed. Some thermostats fail stuck open prevent the car warming up and some stuck closed causing overheating. A thermostat is one part its worth buying from the dealer despite being 3-4 times the cost to ECP.

    -What mileage and age is the car? Has the waterpump been changed? The impellers on the waterpump can gradually break up rather than fail completely. This happened on my s3, causing gurgling and overflow into the header tank you described. This is why waterpumps get replaced every 5 years or 75k with the timing belt.

    If you are confident that the thermostat is ok i would be looking at the waterpump next. Temp sender fault is a possibility but would normally appear on the diagnostics as having an intermittent fault.
    #62
  23. S.line
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    S.line Member

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    [Feb 23, 2014]
    It's fine in the summer but not in winter. But only on short journeys. So I've told the wife not to use 6th when going to work to help heat the engine faster.
    #63

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