coolant light S-70

Discussion in 'Volvo S70' started by cognite tute, Oct 10, 2007.

  1. cognite tute

    cognite tute Guest

    My wife has a '99 Volvo S-70, glt.

    Last week, the coolant light came on, indicating low coolant.

    Found that the coolant reservoir has a crack in the bottom, and was
    leaking coolant, until the coolant level light came on.

    Replaced the tank, and the hose.

    Tank as a float in it, removed the sensor from the old tank, put into in
    the new, and installed it.

    However, the coolant light stays on regardless of the coolant level.

    not leaking, coolant level stays some.

    So how do I get the coolant light to go out?

    any ideas?

    cognite tute, Oct 10, 2007
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  2. cognite tute

    John Smith Guest

    Exactly the same thing happened to me on our 98 V40 T4. Engine
    overheated and car was towed to the service person as roadside
    assistance didn't want to fill up the tank for fear of cracking the
    head. Service guy said the expansion tank had cracked and it was
    replaced. On the way home though, temp just kept rising and I had to
    return (once car cooled down of course). Thermostat had also failed and
    when replaced - problem gone. Maybe check yours??
    Let me know how you go.

    John Smith, Oct 12, 2007
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  3. cognite tute

    Roadie Guest

    You probably have a defective sensor. It may have been close to
    failure in the old tank and all the jostling in moving from one tank
    to another may have killed it.
    Roadie, Oct 12, 2007
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