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Thread: cooling fan probs

  1. #1
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    Default cooling fan probs

    Hi all. still no joy with the gear changing. I'm now thinking there may be a fault with the cooling fans as when temp goes high, gear changing becomes impossible....possibly due to fluid getting too hot. The cooling fans do not seem to come on when temp high, infact i've not noticed them come on at all. I have connected a direct power source to the fans and they work fine. Does anyone know what controls the cooling fans operation when temp goes high??

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    Full Member chrisvectra's Avatar
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    Vehicle : VXR8 6.0 muscle SRI ESTATE XP1

    Trim : VXR/ SRI ESTATE CDTI XP1

    Engine : 6.0 V8 Thunder

    Year : 2008

    Default

    normally a sender unit in the side of the radiator controls the fans
    VXR IS FOR LIFE NOT JUST FOR THRILLS !



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    thanx.

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    As an experiment, can you not do a temp. trial and have a direct source to the fans at all times when ignition is on (so they run all the time). Then if you do not get a gear change problem, your theory is most probably correct i.e. it is temperature related?

  5. #5
    Regular Member Gsi3.2's Avatar
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    is it a manual or an automatic gearbox??...

    if it's a manual then the cars radiator doesn't cool the gearbox oil anyway...it's self contained.. If it's an auto then yes, there is a small cooler on the end of the radiator..the fans are controlled by a unit that will be screwed to the fan's sheild..there is no temp sensor on the rad, it runs off the engine's sender unit..

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    its a manual. If I was to constantly keep the cooling fans running via a direct source of power at all times, can this cause damage to the engine??

  7. #7
    Regular Member Gsi3.2's Avatar
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    not to the engine, but it won't help your gearbox at all..total red herring...

    if you have a tight gearbox the best you can do is drain and refill it.... the fact it only happens when the temp goes high tells me the thermal load on the oil is too great and it's shearing...in effect no longer providing the lubrication the box needs..

    Concentrate on the gearbox.. forget any engine cooling related thoughts..

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    thanx buddy.

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    does anyone know if the clutch fluid pipes run behind the coolng fans??

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