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Thread: thermostat change

  1. #1
    Regular Member vectra-man's Avatar
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    Vehicle : signum 2.2



    Year : 2004

    Default thermostat change

    Hi I have just changed the thermostat + housing on the vec genuine vauxhall parts, done everything as on the how2 but whilst idling the air is at best warm but whilst driving is lovely and hot. I have had the cap of for around 45 min with heater on and still no different.

  2. #2
    Regular Member vmb2722's Avatar
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    Vehicle : Vectra

    Trim : Exclusiv

    Engine : 1.9 CDTi 150

    Year : 2007

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    are you getting fluid returning to the header tank?

  3. #3
    Regular Member vectra-man's Avatar
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    Vehicle : signum 2.2



    Year : 2004

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    hi vmb2722 yes water is returning to the header tank.

  4. #4
    Regular Member vmb2722's Avatar
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    Vehicle : Vectra

    Trim : Exclusiv

    Engine : 1.9 CDTi 150

    Year : 2007

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    have you undone the bleedscrew on the coolant rail at the front of the engine?

  5. #5
    Regular Member vmb2722's Avatar
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    Vehicle : Vectra

    Trim : Exclusiv

    Engine : 1.9 CDTi 150

    Year : 2007

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    try removing the feed pipe to the heater matrix untill water runs through

  6. #6
    Regular Member vectra-man's Avatar
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    Vehicle : signum 2.2



    Year : 2004

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    Quote Originally Posted by vmb2722 View Post
    have you undone the bleedscrew on the coolant rail at the front of the engine?
    I got told the 1.8 does not have a bleed screw. I will go outside and check.

  7. #7
    Regular Member vmb2722's Avatar
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    Vehicle : Vectra

    Trim : Exclusiv

    Engine : 1.9 CDTi 150

    Year : 2007

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    Quote Originally Posted by vectra-man View Post
    I got told the 1.8 does not have a bleed screw. I will go outside and check.
    yeah my bad i was thinking of my car

  8. #8
    Regular Member vectra-man's Avatar
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    Vehicle : signum 2.2



    Year : 2004

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    What pipe is the feed pipe left or right looking at it, whilst i was bleeding it earlier all pipes got hot other the the left pipe coming/goin to the matrix

  9. #9
    Regular Member vmb2722's Avatar
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    Vehicle : Vectra

    Trim : Exclusiv

    Engine : 1.9 CDTi 150

    Year : 2007

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    the one thats cold should be the return, take that off and see if you get coolant out the matrix

  10. #10
    Regular Member alcutler's Avatar
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    Vehicle : vectra c 1.9cdti 120 estate

    Trim : design



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    Are you sure that the engine is fully up to temperature when it was ticking over - mine has been acting a bit strange with these colder outside temperatures (-5) ie taking a lot longer to warm up and no reading on the gauge for a long time after starting but warm air in the car. You could also consider that the new thermostat is faulty - it has been known.

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