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  1. #1
    christinho's Avatar
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    A3 - Overheating Problem?

    Hi,

    I was wondering if anybody could help me with a recent issue i've had with my 1.6 A3. Changed the thermostat a few weeks ago because the car wasn't getting up to temperature, and running around 70 - 80 degrees; now i've replaced that, the car runs between 90 - 100 degrees...

    Anybody had a similar issue? Is it a fault with the water pump or am I just being picky?...

    Any help appreciated...

    Cheers

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  3. #2
    ruairi83's Avatar
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    If it was a fault with water pump mate the temp would be over 100 to be honest.

    My water pump broke in to and my car over heated well over 100c and i new straight away.

    my car usually sits at 80-90 and its a TDI...

  4. #3
    Essflee's Avatar
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    Could be a faulty temp sender...the temp gauge shouldn't ever go beyond 90...
    revo'd

  5. #4
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    christinho, how exactly did you find out the temperature the engine is running at? If it's from the dash, then temp sender unit is responsible for providing that information to the dash. If you search the forum, you will find that this is a very common fault and if yours is the old type, then get it replaced.

    If you haven't already, use the climate control trick to find out a more accurate coolant temperature reading.

  6. #5
    christinho's Avatar
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    I've already changed the temp sensor, that was what I thought was causing the low running temp in the first place; it mainly sits around 95 but can go higher when at idle. It's never gone to 120 but it bugs the hell out of me that it refuses to sit at 90...

    Another thing I was thinking of was maybe the fan isn't kicking in properly, it does come on but only stays on for a brief moment and then goes off, even when the engine is clearly still not running at the correct temp...

    Cheers for the quick response btw guys..
    Last edited by christinho; 10th April 2009 at 10:32.

  7. #6
    Essflee's Avatar
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    So you've replaced the thermostat and the temp sender, but still having problem. Do you know when the water pump was last changed ? What sort of mileage has the car done ??the water pump cuokd be on the way out...
    revo'd

  8. #7
    christinho's Avatar
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    Don't know when the pump was last replaced, but the car has done 98,000 miles it could be the problem...

    Did take the pipe off the coolant bottle to check that water was getting around, it was coming out but not with any great force, unsure how it should be but there is water getting around the system....

    At the end of my tether with this car atm! lol


  9. #8
    Essflee's Avatar
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    If it bothers you a lot, then it may be worth getting the cambelt changed and doing the water pump at the same time, at almost 100k it won't be far away anyway...another bonus is doing the work now you'll know the car is going to be ok while you own it...
    revo'd

  10. #9
    christinho's Avatar
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    Cheers for the advice...

    Might sound like a daft question but I wouldn't mind checking the fuse for the fan as it doesn't want to kick in at all atm, just want to know were it's located?...

    Thanks

  11. #10
    Essflee's Avatar
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    The fuse I believe is in the side of the dash, drivers side...when I had my A3 1.8 T I don't think I ever heard the fan in the 3 years I owned it...say said for the S3 so far...
    revo'd

  12. #11
    abdus's Avatar
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    when you changed the thermostat, I guess you lost some coolant? did you top it up and also allow for any trapped air to go?
    ^^ In my opinion


  13. #12
    abdus's Avatar
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    BTW, yours isn't a turbo, does it have to sit at 90? Some cars go a little bit over to 98-100 at idle esp with the weather becoming warmer now, then go back to normal temp (90-94) while driving, colling down with air coming in.
    ^^ In my opinion


  14. #13
    christinho's Avatar
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    Right, another day, another issue. The car has now began to misfire at idle, doesn't seem to lose power when accellerating but feels lumpy when sitting for a while and doesn't seem to start right. It isn't the MAF, coils or plugs (all have been replaced at some point) i'm guessing the coil pack is the next place to look?...


    "when you changed the thermostat, I guess you lost some coolant? did you top it up and also allow for any trapped air to go?"

    Yep

  15. #14
    abdus's Avatar
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    you need to vagcom the car and scan for faults. it will make it a bit easier to look for the issues
    ^^ In my opinion


  16. #15
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    Like everyone has metioned it could be the water pump. But before you go ahead, check a couple of things.

    Firstly, when warming the car up just make sure the top radiator hose heats up till it's really hot THEN the bottom hose warms up. The 1600s suffer from broken MAP controlled thermostat housings, usually the sign is the rad fans staying on. The thermostat itself is usually ok but the plastic housing that locates on the thermostat breaks.

    Secondly, just make sure the gauge is functioning correctly. Make sure it starts where it should. I've spent a long time on one car wondering why it was always over heating... to find the gauge was faulty! DOH!

  17. #16
    dela's Avatar
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    right, i have had my 1.6 for just over a year and am selling up, i have had both problems you are speaking of and many more, speaking to audi specialists i learnt that the AKL engine is the worst most problamatic engine they made, anyway point being your temp problem is deffinitely your water pump and if you leave it to get worse more plastic fins will snap off and then it will be going up to 120 degrees, best to get it sorted before it gets that bad, and id try replacing your lambda sensor, 60 from audi but it sorted my car right out

    once youve fixed it id recomend selling it, if i didnt have a years warranty on it when i bought it i would have spent almost 2k on it since owning it! 1.8T all the way!

  18. #17
    dela's Avatar
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    also change your spark plugs at the same time as changing the lambda probe

 

 

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