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  1. #11
    Join Date
    Jan 2011
    Location
    Dorset
    Posts
    507

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Quote Originally Posted by bowler View Post

    Is 85/86 an ok running temp at high RPM, the manual says the operating range is up to 90 so this would be ok? I plan to swap the senders and see what happens, new ones seem to be over 100 quid. Then flush the system with rydlyme or similar to be sure.

    D
    Manual says
    Thermostat opens at 74-78C, 165-172F
    Fully open at 88-92C, 190-197F
    If temperature exceeds this but alarm does not sound then the overtemperature sensor may be faulty. Happened to me.
    Broom owners club..... www.broomowners.com

  2. #12
    Join Date
    Oct 2014
    Location
    Ireland
    Posts
    97

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Hmmm. Good point. The alarm buzzer works but how can i test the sender in the dock? Can i ground it with the engine running or something?

  3. #13
    Join Date
    Jan 2011
    Location
    Dorset
    Posts
    507

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Remove it, stick it in a pan of water and bring to the boil.
    If it is open circuit when cold and closed circuit when hot or vice versa then it is working.
    If there is no change between room temp. and boiling then it is not working.
    Broom owners club..... www.broomowners.com

  4. #14
    Join Date
    Oct 2014
    Location
    Ireland
    Posts
    97

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Makes sense. Cheers!

  5. #15
    Join Date
    Mar 2016
    Posts
    1,053

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Can you set your heat gun to Celsius? Sorry !
    Gauges are pretty much not too accurate usually. My merc mpi shows 160+ on the gauge, but actual temp from the engine ecu sender shows 152.
    You should be around the 85-90oC on that engine. Not sure if you are measuring in Fo ?

  6. #16
    Join Date
    Oct 2014
    Location
    Ireland
    Posts
    97

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Quote Originally Posted by QBhoy View Post
    Can you set your heat gun to Celsius? Sorry !
    Gauges are pretty much not too accurate usually. My merc mpi shows 160+ on the gauge, but actual temp from the engine ecu sender shows 152.
    You should be around the 85-90oC on that engine. Not sure if you are measuring in Fo ?
    Sorry, I was jumping between units.

    Gauge shows 95C but IR gun on the tstat housing shows 85/86C.

    D

  7. #17
    Join Date
    Feb 2015
    Location
    Conwy
    Posts
    4,245

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Quote Originally Posted by bowler View Post
    Sorry, I was jumping between units.

    Gauge shows 95C but IR gun on the tstat housing shows 85/86C.

    D
    Quote Originally Posted by BruceK View Post
    Check the electrical connections between sender and gauges and power. Any resistance causing voltage drop will also make the gauges read high.

  8. #18
    Join Date
    Oct 2014
    Location
    Ireland
    Posts
    97

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Will do Bruce. Just clarifying the readings.

    Cheers.

  9. #19
    Join Date
    Jan 2009
    Location
    Lochaber
    Posts
    7,392

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Quote Originally Posted by bowler View Post
    Sorry, I was jumping between units.

    Gauge shows 95C but IR gun on the tstat housing shows 85/86C.

    D
    I would imagine the outside of the housing would be cooler than the inside. Not sure the accuracy of an ir gun is such that you actually have a difference in temperature between both. Diesels tend to like higher temperatures, about 90c would be ok in my opinion. Temperatures locally within the engine will be higher than the bulk coolant temperature, cooling systems are pressurised to prevent local boiling in those areas and the subsequent damage the gas bubbles would cause.

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