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Thread: High temperature :( *Its got a fever! :o*

  
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    mattyp's Avatar
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    High temperature :( *Its got a fever! :o*

    Car: Astra MK3 1.4 mpi 1994

    Was driving my car the other day and the temperature started heading towards the red (didnt quite hit it, but still higher than it should).

    So I checked under the hood and the damn fan wasn't spinning.

    I then rigged up some high tech equipment (a strip of wire) and placed them accross the coolant switch temp sensor cable (so it would trigger the fan) and the fan came on as you would expect.

    Therefore I proceeded to buy a new switch and fitted it this morning, but its still not kicking in ?

    Coolant levels are level and nothing is leaking, but why is that fan not kicking in?

    My ideas:
    1)The sensor on the engine is over reading, hence the other sensor that I replaced on the radiator isnt kicking in, because it isnt needed.

    2) Coolant air lock somewhere?

    Any other ideas or words of wisdom?

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    PeterPiper's Avatar
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    thermostat sh*gged?
    try taking the thermostat out, boiling it up in a saucepan of water and see if it works
    Any info on V6 MK4 conversions greatly appreciated!
    ----x--Petey--x----

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    Quote Originally Posted by PeterPiper
    thermostat sh*gged?
    try taking the thermostat out, boiling it up in a saucepan of water and see if it works
    Cheers mate, will do that.

    Just been outside again to try and work it out, now need a warm cuppa to warm me up

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    Was just checking the haynes manual and apparently on the 1.4 model you have to remove the rear cambelt cover which means taking off the cambelt e.t.c (dont want to do that, it will mess up all the tensions!!)

    I'm going to check for air locks tommorow and hope its that *fingers crossed*

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    Big_Up_Vauxhall's Avatar
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    On early models you may be able to get away with removing the thermostat without removing the cambelt, but you need the cover off.

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    Tried removing any air lock today, had a few bubbles but nothing major.

    I then had another think as to why that fan wasnt kicking in as I know the fan and the sensor both work. *Ching* its not hot enough down there. So warmed the car back up again touched the top of the rad *OWWWW* touched the bottom *nothing*. So one blocked rad, going to flush it first, if that does nothing, I think a replacement is in order.

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    In the end it did actually turn out to be the thermostat in the engine.

    Had it all replaced along with the cambelt, tensioner, water pump and alternator belt. Just to be safe, works like new again

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