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  1. #1
    Join Date
    Jul 2004
    Location
    Manchester
    Posts
    144

    Default Engine with heat exchanger what coolant temperature?

    My Lombardini 702M coolant seemed to be steady at 85C last time I ran the engine.I'm assuming that all engines with heat exchangers operate at about the same temperature.Can anybody say at what temperature overheating becomes a possibility.Thanks

  2. #2
    Join Date
    Jan 2007
    Location
    Portsmouth
    Posts
    1,170

    Default Re: Engine with heat exchanger what coolant temperature?

    Quote Originally Posted by crown22 View Post
    My Lombardini 702M coolant seemed to be steady at 85C last time I ran the engine.I'm assuming that all engines with heat exchangers operate at about the same temperature.Can anybody say at what temperature overheating becomes a possibility.Thanks
    My Volvo D2/40 runs normally at 90C, which is what the thermostat is rated at. I believe the overheat temperature sensor is set at 110C. The cooling system has a small header tank and is fitted with a pressure cap so should not boil until at least 120C.
    ------------------------------------
    Loves sailing, hates gardening

  3. #3
    Join Date
    Jul 2006
    Posts
    4,654

    Default Re: Engine with heat exchanger what coolant temperature?

    In a pressurised system you can have coolant well over 100C without it boiling. Boiling point increases with pressure. Steady 85C sounds fine.

  4. #4
    Join Date
    Apr 2005
    Location
    Milton Keynes, Bucks, UK
    Posts
    576

    Default Re: Engine with heat exchanger what coolant temperature?

    My Beta stays at 90c.

  5. #5
    Join Date
    Nov 2009
    Location
    Home UK Midlands / Boat Croatia
    Posts
    18,317

    Default Re: Engine with heat exchanger what coolant temperature?

    Quote Originally Posted by jwilson View Post
    In a pressurised system you can have coolant well over 100C without it boiling. Boiling point increases with pressure. Steady 85C sounds fine.
    +1

    Richard

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