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Thread: Coolant loss

  1. #1
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    Default Coolant loss

    Hi guys what in your humble opinion are the main reasons for coolant loss?

    The facts
    1) lose more when on longer journeys
    2) no apparant sign of leaks
    3) Temperature gauge reading normal
    4) Only indication of anything wrong is the radiator symbol
    5) Used the supposedly more potent version of radweld and that hasn't worked either (totally lost now)

    Have booked it in to the garage for a pressure test sems its the only way to go I am dreading it

    Thanks in advance boys

  2. #2
    Regular Member cerbrious's Avatar
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    Default

    i.d say centre seal on the waterpump

  3. #3
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    Was losing coolant but there was a tell tale residue on the seam of the coolant header tank. New tank sorted problem, only £17 from the dealers which included the level switch. Don't know if tank splitting on the seam is a common problem with the vectra.

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    Regular Member Swaite53's Avatar
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    It could be the header tank cap. They have a habbit not sealing the system very well.

    I find my local dealer doesn't tighten it up properly after a service, which causes the coolant to evaporate. Make sure the cap is completely tight.

    If I forget to re-tighten it after a service, mine will loses coolant, but is fine if I tighten it.

  5. #5
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    I have replaced the filler cap and it is well tight and cant see any tell tale signs of leakage so it looks like its gonna be expensive again ****** sick of cars lol

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    forgot to say that when I go to top the water/antifreeze up there is very little or no pressure when i loosen the cap! weather this is significant i dont know

  7. #7
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

    Default

    I'm in the same situation as you mate. My V6DTi has lost some coolant in 3 months, about a cm under the marking I made in April. No apparent leaks on the driveway, but I haven't seen the coolant light on so far. Temperature guage is reading normal.

    I'm totally lost

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    bit worse for me Celes i'm losing about 200ml on a 60 mile run which is bad i think

  9. #9
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

    Default

    Quote Originally Posted by monkeyhinger View Post
    bit worse for me Celes i'm losing about 200ml on a 60 mile run which is bad i think
    Have you had the engine opened yet? Better check the headgasket

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