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  1. #1
    Join Date
    Oct 2007
    Location
    Romsey, Hants
    Posts
    1,222

    Default Running the engine with empty calorifier

    I drain the water system in the winter and wondered if it is harmful running the engine up to temp and so putting hot water through the coil in the calorifier when the tank is empty. Sad to be thinking about winter already

  2. #2
    Join Date
    Mar 2005
    Location
    suffolk
    Posts
    2,042

    Default Re: Running the engine with empty calorifier

    Not sure of the of the result, but would definitely fit seacok valves on both Inlet and Outlet pipes
    just in case
    That remind s me...

  3. #3
    Join Date
    Jun 2001
    Location
    UK East Coast
    Posts
    1,850

    Default Re: Running the engine with empty calorifier

    Quote Originally Posted by stuartwineberg View Post
    I drain the water system in the winter and wondered if it is harmful running the engine up to temp and so putting hot water through the coil in the calorifier when the tank is empty. Sad to be thinking about winter already
    I have never had a problem doing that in the winter. It is good practice to have valves where the two coolant hoses are connected to the engine so you can isolate the heating coil, but not essential.

    Www.solocoastalsailing.co.uk

  4. #4
    Join Date
    Oct 2007
    Location
    Romsey, Hants
    Posts
    1,222

    Default Re: Running the engine with empty calorifier

    Quote Originally Posted by Plum View Post
    I have never had a problem doing that in the winter. It is good practice to have valves where the two coolant hoses are connected to the engine so you can isolate the heating coil, but not essential.

    Www.solocoastalsailing.co.uk
    Yep, previous boats had this but wondered if necessary

  5. #5
    Join Date
    May 2016
    Location
    Suffolk
    Posts
    8,019

    Default Re: Running the engine with empty calorifier

    Quote Originally Posted by stuartwineberg View Post
    I drain the water system in the winter and wondered if it is harmful running the engine up to temp and so putting hot water through the coil in the calorifier when the tank is empty. Sad to be thinking about winter already
    My last boat was a motorboat, i used to drain the water system for the Winter, but we still used the boat, never had a problem. All you're doing is pumping hot water through a pipe.
    Rainbow Marine.
    www.rainbowmarine.co.uk

  6. #6
    Join Date
    Jun 2001
    Location
    Scotland
    Posts
    6,305

    Default Re: Running the engine with empty calorifier

    Not a problem as others have said.
    Eastern Scotland and beyond.

  7. #7
    Join Date
    Aug 2007
    Location
    Suffolk
    Posts
    5,173

    Default Re: Running the engine with empty calorifier

    The only thing you might notice is that the engine may warm up a bit quicker as it is not heating the water in the calorifier.

  8. #8
    Join Date
    Dec 2007
    Location
    S.W. France
    Posts
    7,698

    Default Re: Running the engine with empty calorifier

    Quote Originally Posted by Leighb View Post
    The only thing you might notice is that the engine may warm up a bit quicker as it is not heating the water in the calorifier.
    Good point..
    Otherwise not a problem. Heating a bit of air to 80° is not going to do anything much.

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