Coolant Temperature Warning

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  1. 14th November 2020, 03:45 PM #1
    hockeylad72
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    Hi everyone,
    2007 R55 Cooper S
    I am getting the temp warning when car is under load usually uphill.
    Has had the following work done, cylinder head rebuilt, new thermostat housing, water pump and radiator, bottom end has also been rebuilt.
    Thermostat housing (genuine mini part) has been replaced again and I am still having issues.
    Can anybody suggest anything to be checked. What I will say is I have a Bluetooth elm327 which shows temp going to 120oC which flags up the warning then within around 5 seconds temp drops to around 95oC
    Any suggestions would be appreciated
    Davie
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  2. 14th November 2020, 03:57 PM #2
    MINI William
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    I take it you’ve checked coolant levels? Also made sure that the system has been bled properly
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  3. 14th November 2020, 04:16 PM #3
    hockeylad72
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    Checked coolant level and it is OK, been refilled using vacuum bleeder
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  4. 14th November 2020, 08:31 PM #4
    badwolf340
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    The other thing to consider is the temp sender functionality ok ,could be a faulty sender if everything else is ok
    The cars in front are New MINI Scotland
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  5. 14th November 2020, 09:31 PM #5
    hockeylad72
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    Been back out to check coolant level, would appear to have coolant forced out of cap as droplets of coolant on the underside off the bonnet, thinks I may have to bleed system again
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  6. 25th November 2020, 07:56 PM #6
    hockeylad72
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    To help anyone else in the future, turned out to be fault ambient temperature sensor. This was related to fault code 2f22 hope this may help someone in the future.
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  7. 26th November 2020, 09:05 AM #7
    badwolf340
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    Great that you have it sorted
    The cars in front are New MINI Scotland
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  8. 26th November 2020, 09:52 AM #8
    MINI William
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    Pleased it’s sorted
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    Ice Blue R55 Clubvan - JCW Shiftlight, JCW Carbon Fibe Handbrake, JCW Carbon Fibre Dash, JCW Steering Wheel, Recaro JCW Sportster CS, CoolerWorx ShortShifter, BC Racing Coilovers, JCW Brembo 4pots, HEL Braided Lines, JCW Front Bumper, MINI Challenge Splitter, White Rota Blitz
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