Chris NottAH Fabrications
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  1. #1
    reggieroo's Avatar
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    allroad-Coolant symbol flashes in the morning when cold!

    On a few occasions now that the cold weather is starting to creep in, the coolant symbol flashes on a cold morning after start up. It flashes for a few minutes then goes out & only does it if it's a cold morning, you can start it in the afternoon when the weather is warmer & nothing flashes up.

    I looked it up in he drivers manual & it say that it's either coolant level too low or the coolant temp is too high. I've checked the coolant level (an hour after using it) & it was fine, I put a spot in as I thought maybe when it's cold it goes down a little but the symbol still flashes up for a few minutes on cold mornings. It's obviously not temperature too high so could it be?
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

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  3. #2
    kite's Avatar
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    Try giving the prongs in the coolant res a srape.
    Mk1 TT's seem to suffer with this too.

  4. #3
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    usually its a build up of crud on the two pins (level sensor) that stick into the coolant inside the expansion tank.
    a new expansion tank should sort it out as the level sensor is integral with it.

  5. #4
    reggieroo's Avatar
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    Mmmm worth a look as the coolant level is fine, checked it yesterday morning again.
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

  6. #5
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    Noticed something odd today. I started it up, the coolant light came on again so I went on with the journey & noticed that the temp gauge hadn't moved but stayed on 60. I also had the climate on high but it never got that hot in there as expected. I looked it up in the manual & it says that the gauge should go midway to about 90.

    Wondering now if I have a dodgy thermostat?
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

  7. #6
    kite's Avatar
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    Coolant light on when first starting can be a sign of a dying battery.
    The engine temp should be @90C, sounds like your stat has gone, if your going to change the stat its cambelt off !!

  8. #7
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    Doesn't sound good having to take off the cambelt! It already needs a service & new front brakes.
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

  9. #8
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    Quote Originally Posted by reggieroo View Post
    Doesn't sound good having to take off the cambelt! It already needs a service & new front brakes.
    You can change the thermostat without replacing the belts or pulleys but when there is soo much work involved why risk-it ? I do full cambelt changes for the v6 tdi for much less money than any dealer or specialist can ! Pm me for a quote. I include full cambelt kit(contitech wich includes the vibration damper, tensioner + relay roller), water pump with metal impeller, genuine thermostat, aux. belts (2 of), 5L of G12 antifreeze and dynamic setting of the injector pump. Regards, Chris- 077 899 12128.
    FOR SALE:
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  10. #9
    The Slug's Avatar
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    does the warning only come on for a bit then go off once warmed up?
    Vehicle wrapping specialist

    NOW SOLD S6 Avant 4.2 V8....ooooo the noise hehe

    NOW SOLD '03 A3 TDi Quatty Sport Mods so far: Aerowipers front & Rear, Type R Sting ariel, 18" RS-TT Alloys, Superchips remap, Eibach Pro Springs -40mm, Bilstein B8 dampers, R32 ARB's Front & Rear, Pipercross panel filter

  11. #10
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    Quote Originally Posted by adamss24 View Post
    You can change the thermostat without replacing the belts or pulleys but when there is soo much work involved why risk-it ? I do full cambelt changes for the v6 tdi for much less money than any dealer or specialist can ! Pm me for a quote. I include full cambelt kit(contitech wich includes the vibration damper, tensioner + relay roller), water pump with metal impeller, genuine thermostat, aux. belts (2 of), 5L of G12 antifreeze and dynamic setting of the injector pump. Regards, Chris- 077 899 12128.
    I'll PM you soon.
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

  12. #11
    reggieroo's Avatar
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    Quote Originally Posted by The Slug View Post
    does the warning only come on for a bit then go off once warmed up?
    Yep just comes on when it's really cold for about 10-20 seconds then goes off.
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

  13. #12
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    just needs top up then! its because of the extremes of temp, going from -5 say upto 60-90 deg's engine temp soo i wouldnt presume anything sinister Just topup by small amount when cold...look at the level it will be minute, probably an inch within the header tank.
    Vehicle wrapping specialist

    NOW SOLD S6 Avant 4.2 V8....ooooo the noise hehe

    NOW SOLD '03 A3 TDi Quatty Sport Mods so far: Aerowipers front & Rear, Type R Sting ariel, 18" RS-TT Alloys, Superchips remap, Eibach Pro Springs -40mm, Bilstein B8 dampers, R32 ARB's Front & Rear, Pipercross panel filter

  14. #13
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    Quote Originally Posted by The Slug View Post
    just needs top up then! its because of the extremes of temp, going from -5 say upto 60-90 deg's engine temp soo i wouldnt presume anything sinister Just topup by small amount when cold...look at the level it will be minute, probably an inch within the header tank.
    That was the first thing I tried, topping up when cold, made no difference unfortunately.
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

  15. #14
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    the brake symbol flashing on first start up is caused by a low voltage spike, it can be the sign of a dying battery.

  16. #15
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    Quote Originally Posted by kite View Post
    the brake symbol flashing on first start up is caused by a low voltage spike, it can be the sign of a dying battery.
    It's the coolant symbol not the brake symbol.
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

  17. #16
    kite's Avatar
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    Quote Originally Posted by reggieroo View Post
    It's the coolant symbol not the brake symbol.
    sorry.....I must read more carefully...
    Have you tried scraping the prongs inside the coolant res. ?

  18. #17
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    Quote Originally Posted by kite View Post
    sorry.....I must read more carefully...
    Have you tried scraping the prongs inside the coolant res. ?
    No not yet, I've been meaning to go out & do it among other things. I should go do it now actually.
    Audi S6 Avant 4.2 V8 Quattro 340bhp, 19" OEM RS6 alloys, running on LPG.

 

 

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