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Thread: Overheating

  1. #1
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    Default Overheating

    Hiya all,

    The Car: Vectra elegance 1.8 saloon - 2003

    Problem history:
    Car constantly ran cold - Thermostate changed
    Leaking radiator - Changed.
    Heater blowers blowing cold air - Thought this was thermostate (but still runs cold?)

    Latest problem:
    Very strange overheating. You can drive for a while and car runs ok but the temperature fluctuates between 85C and 100C. Then out of the blue it increases to over 100C into red (shut down engine when this happens - temp warning light flashes).

    I have been told that when the radiator was changed they have to bleed the system which on these is a pain in the bum. But I am not convinced that this is a bleeding issue as the heater blows cold air and has done for 12 months now, but I have changed the obviouse things like thermostate.

    Could a blockage in the heater matrix cause the cars temperature to behave this way? The car is not loosing any water (well since I changed the raiator anyway). I have checked the water pipe into the radiator (and its hot) and coming out is cold (or almost cold). Or is this a water pump issue?

    Any advice?

  2. #2
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    Vehicle : Vectra c facelift flame red



    Year : 2006

    Default

    Quote Originally Posted by Steve1974 View Post
    Hiya all,

    The Car: Vectra elegance 1.8 saloon - 2003

    Problem history:
    Car constantly ran cold - Thermostate changed
    Leaking radiator - Changed.
    Heater blowers blowing cold air - Thought this was thermostate (but still runs cold?)

    Latest problem:
    Very strange overheating. You can drive for a while and car runs ok but the temperature fluctuates between 85C and 100C. Then out of the blue it increases to over 100C into red (shut down engine when this happens - temp warning light flashes).

    I have been told that when the radiator was changed they have to bleed the system which on these is a pain in the bum. But I am not convinced that this is a bleeding issue as the heater blows cold air and has done for 12 months now, but I have changed the obviouse things like thermostate.

    Could a blockage in the heater matrix cause the cars temperature to behave this way? The car is not loosing any water (well since I changed the raiator anyway). I have checked the water pipe into the radiator (and its hot) and coming out is cold (or almost cold). Or is this a water pump issue?

    Any advice?
    Any replies to this? I am having this problem on 1.9cdti

  3. #3
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    Vehicle : vectra c

    Trim : ls

    Engine : 1800 non vvt

    Year : 2004

    Mileage : 139000

    Default

    sounds like water pump to me

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    Vehicle : vectra c

    Trim : ls

    Engine : 1800 non vvt

    Year : 2004

    Mileage : 139000

  5. #5
    Regular Member stevoxsi's Avatar
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    Vehicle : Insignia

    Trim : Sri Vx-line

    Engine : 2.0 Cdti 160

    Year : 2011

    Default

    If it seizes it can take the timing belt out! Drive at own risk....

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    Vehicle : vectra c

    Trim : ls

    Engine : 1800 non vvt

    Year : 2004

    Mileage : 139000

    Default

    Then out of the blue it increases to over 100C into red (shut down engine when this happens - temp warning light flashes).


    (do not drive car turn off engine before damage )

    repeat

    (do not drive car turn off engine before damage )

  7. #7
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    Vehicle : vectra c

    Trim : ls

    Engine : 1800 non vvt

    Year : 2004

    Mileage : 139000

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    Default

    Quote Originally Posted by Steve1974 View Post

    I have been told that when the radiator was changed they have to bleed the system which on these is a pain in the bum. But I am not convinced that this is a bleeding issue as the heater blows cold air and has done for 12 months now, but I have changed the obviouse things like thermostate.
    Naw, the system is self bleeding.

    Quote Originally Posted by vectra ste View Post
    sounds like water pump to me


    Take the cap off the expansion tank and start the car. Look into the expansion tank and you should see water returning to the header at the 6 oclock position, if you dont then yes id suggest the water pump has failed.

    Heres 2 videos from my 1.8, 1st one from cold and the second one from when it goes off the cold start valve.




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