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Thread: car temp

  
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    car temp

    the temperture of my car takes ages to warm up. sometimes it barely reaches the first mark unless im in traffic and it goes to the corresct temp, but as soon as im on the move again it drops. anyone know what the problem could be and what i can do to solve the problem.
    GTC SRI 2.0 CDTI

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    Sounds like the thermostat is stuck open

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    Follow jam On Twitter
    Geoffs the man.
    Its a jam thing

    Haec credam a deo pio, a deo justo, a deo scito?



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    Mine doesn't go up either, but wont that be due to the cold weather keeping stuff cold??
    It did go up before whilst I doing an engine flush, but that was obviously due to sitting still with the engine running for 15mins. But usually this time of year it hardly goes past the first 2 marks.
    Astra MkIV 1.6 8v (Z16SE) 2001

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    Yes, mine is like that, it take a while to get to normal running temp. The funny thing is first time i start it up cold, it will pass the first two bars then drop down to cold again then start to warm up??!?

    Al
    Black 1.8 Coupe

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    I let the engine warm up in cold weather. However in a journey of 40% motorway 60% A roads with no traffic jam at temps reading at -1.5 my 1.6 still managed to get to 85degrees which is slightly colder than usual as norm is about 89-90.

    Al something is very wrong there mate.

    jam
    Its a jam thing

    Haec credam a deo pio, a deo justo, a deo scito?



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    by way of an explanation - the thermostat isolates the water in the block from that in the radiator. When you start the car the stat is closed so the engine will warm up quicker having a captive supply of water.

    When it reaches the right temp, the stat opens and lets the hot engine water flow in the rad to be cooled - it will then automatically open and close as necessary to keep the temp in the block constant.

    If it's stuck open, then the water can flow through both the block and the rad, so as it's being heated by the engine, it's also being colled by the rad - hence it never gets hot.

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    Ah, comprende.
    Astra MkIV 1.6 8v (Z16SE) 2001

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    Quote Originally Posted by jam
    Al something is very wrong there mate.
    I really hope not Jam mate!

    If the Stat is stuck open, how easy is it to sort?

    Al
    Black 1.8 Coupe

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    Dead easy - at the engine end of the top rad hose you'll see an alloy dome with a bolt on each side: the thermostat is under there.

    take off the top hose
    undo the two bolts
    take out the thermostat
    clean up all the surfaces
    fit new thermo and sealing ring
    and the put it all back together again
    do the bolts up to 20mn

    refill and check for airlocks and leaks

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