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  1. #1
    Join Date
    Oct 2014
    Location
    Ireland
    Posts
    95

    Default TAMD41A Running Temp and Cooling System Questions

    Hello all,

    I have been experiencing a running temp problem on my port engine since new.

    The temp guage reads 200 when pushed to WOT. However, no over heat alarms. An IR gun on the tsat housing shows temps around 85/86 degrees where it seemed to level off. Sadly, due the number of no wake zones I can't take it for an extended run until we are next at sea (which will likely be the next season). Both gauges above and below give inconsistent readings and appear accurate at low speeds but according to the IR gun read high when over 80.

    Could this be the sender?

    Since buying her I have rebuilt the water pump (which was leaking at the rear seal) and have replaced the seals on the heat exchanger which interestingly enough appeared pretty clean (perhaps not surprising as she has been in fresh water for the last 14 years) although a thorough clean in on the cards. I also noticed that the hoses where not lined up correctly on the end plate. The left image is after, right image before.

    20190712_122638.jpg20190712_113146.jpg20190712_111628.jpg

    The gauge downstairs always read about 10C higher than the one on the flybridge (which would climb slowly to 200 and appeared to be the more accurate of the two), but since this correcting the pipework they both climb to 200 quickly when pushed which seems odd, but the IR gun tells a different story so I am hoping it is electrical and a coincidence.

    What would the effect of the hoses being lined up like this be? Running hotter I assume? Strange though as I never got an alarm even when they were like this and the gauges read high.

    Moving forward.

    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.

    Are there any other measurements for temp I should check with the gun?

    Sorry for the ramble. All thoughts welcome.

    D

  2. #2
    Join Date
    Jan 2011
    Location
    Dorset
    Posts
    502

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Shouldn't the hoses align with the quadrants?
    It is hard to tell from the pix also are there seals where the end plate sits against the three ribs that channel the flow?
    There are manuals available for the 41 series engines if you look online.
    Broom owners club..... www.broomowners.com

  3. #3
    Join Date
    Jun 2001
    Location
    UK East Coast
    Posts
    1,841

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Quote Originally Posted by bowler View Post
    Hello all,

    I have been experiencing a running temp problem on my port engine since new.

    The temp guage reads 200 when pushed to WOT. However, no over heat alarms. An IR gun on the tsat housing shows temps around 85/86 degrees where it seemed to level off. Sadly, due the number of no wake zones I can't take it for an extended run until we are next at sea (which will likely be the next season). Both gauges above and below give inconsistent readings and appear accurate at low speeds but according to the IR gun read high when over 80.

    Could this be the sender?

    Since buying her I have rebuilt the water pump (which was leaking at the rear seal) and have replaced the seals on the heat exchanger which interestingly enough appeared pretty clean (perhaps not surprising as she has been in fresh water for the last 14 years) although a thorough clean in on the cards. I also noticed that the hoses where not lined up correctly on the end plate. The left image is after, right image before.

    20190712_122638.jpg20190712_113146.jpg20190712_111628.jpg

    The gauge downstairs always read about 10C higher than the one on the flybridge (which would climb slowly to 200 and appeared to be the more accurate of the two), but since this correcting the pipework they both climb to 200 quickly when pushed which seems odd, but the IR gun tells a different story so I am hoping it is electrical and a coincidence.

    What would the effect of the hoses being lined up like this be? Running hotter I assume? Strange though as I never got an alarm even when they were like this and the gauges read high.

    Moving forward.

    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.

    Are there any other measurements for temp I should check with the gun?

    Sorry for the ramble. All thoughts welcome.

    D
    Hi, your coolant will boil and turn to steam between 110 and 120 degrees C (assuming your header tank pressure cap is maintaining the pressure) so unless the pressure cap is letting lots of boiling water/steam escape your engine is not overheating in a big way so the only problem you have is a faulty gauge. Is your water temperature alarm wired to a seperate sensor in the coolant circuit? If so, and it is not sounding, then that confirms. I assume the gauge on the other engine reads ok at around 85 so yes, swapping senders will be useful but first why not just extend the wires to the senders and swap them over so you can compare the gauges?

    Www.solocoastalsailing.co.uk

  4. #4
    Join Date
    Apr 2007
    Location
    midlands
    Posts
    7,330

    Default Re: TAMD41A Running Temp and Cooling System Questions

    End cap is on wrong looking at the angle on pic on right .
    The 2 rubber hoses should be closest to the engine , the hose that goes to the exhaust elbow is also on the wrong outlet .
    The pic on the left is correct

  5. #5
    Join Date
    Jan 2011
    Location
    Dorset
    Posts
    502

    Default Re: TAMD41A Running Temp and Cooling System Questions

    According to the manual
    Hot engine @ operating speed 59.7 - 71.1 psi
    SAE 15W/40 oil
    Broom owners club..... www.broomowners.com

  6. #6
    Join Date
    Feb 2015
    Location
    Conwy
    Posts
    4,182

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Check the electrical connections between sender and gauges and power. Any resistance causing voltage drop will also make the gauges read high.

  7. #7
    Join Date
    Jun 2001
    Location
    UK East Coast
    Posts
    1,841

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Quote Originally Posted by Montemar View Post
    According to the manual
    Hot engine @ operating speed 59.7 - 71.1 psi
    SAE 15W/40 oil
    Errr, we were talking about the cooling system, not the lubricating system ☺️

    Www.solocoastalsailing.co.uk

  8. #8
    Join Date
    Oct 2014
    Location
    Ireland
    Posts
    95

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Hi all,

    Thanks for the replies. Yes, I believe there is an alarm but of course will have to double check! The boat is a Fairline Corniche for anyone who is familiar with them. I think volvopaul has had two.

    I have already swapped the gauges to no avail hence my thought on the sender. Will swap and check the wiring.

    I will be thrilled if that sorts it.

    D

  9. #9
    Join Date
    Apr 2007
    Location
    midlands
    Posts
    7,330

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Quote Originally Posted by bowler View Post
    Hi all,

    Thanks for the replies. Yes, I believe there is an alarm but of course will have to double check! The boat is a Fairline Corniche for anyone who is familiar with them. I think volvopaul has had two.

    I have already swapped the gauges to no avail hence my thought on the sender. Will swap and check the wiring.

    I will be thrilled if that sorts it.

    D
    If your heat exchanger is piped as in the right side photo on your first post that’s the reason , basically the salt water passes through the cooler 4 times but how it’s piped now it only passes through half of it .

  10. #10
    Join Date
    Oct 2014
    Location
    Ireland
    Posts
    95

    Default Re: TAMD41A Running Temp and Cooling System Questions

    Thanks Paul.

    That's how it was piped but now piped properly. I only noticed when I checked the anodes last month. I think the gauge/sender is a separate issue as both are still reading high compared to the IR gun.

    D

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