TEMP gauge reading when towing- Duramax Diesel

Discussion in 'Trailering' started by RidgeRunner, Mar 2, 2017.

  1. RidgeRunner

    RidgeRunner New Member SILVER Sponsor

    185
    Jan 25, 2017
    Chesapeake VA
    Amberjack w/ Fishing Package. Full Camper Pkg. 3 ax. Trler. Standard Horizon 2200 VHF w/AIS No Mid
    Single 350 MAG MPI B3
    So my 05' Silverado 2500HD diesel, while running like a champ, seems to run warmer when towing. DOES YOURS ??
    I'm pulling 8k plus trailer
    The gauge runs 1/2 the dial, or about 200-210f. Normally it runs about 180ish.
    Any other duramax owners seeing this ??
     
  2. William R. Thomas

    William R. Thomas New Member

    20
    Dec 28, 2010
    Erie
    2006 Searay 270 Amberjack
    350 Mercruiser w/Bravo III Drive
    Talk about a coincidence, I also own a 2006 270 Amberjack. In addition, I also own a 2005 Silverado 3500 Dually with a Duramax engine and Allison transmission. I am located in Pennsylvania, where there are plenty of hills. When towing my boat over 100 miles to Lake Erie in the spring, my temperature gauge will rise to the center peg, or sometimes slightly above, depending on outside temperature. This fluctuation is normal. I have flushed my cooling system, and even replaced the Thermostats (there are two in the engine) and it still behaves the same. Hope this was helpful to you.

    Bill
     
  3. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    That sounds about right. The cooling system/engine was redesigned on the 6.6 (compared to the 6.5) be more efficient. Along with that, means the temps will run higher (which is more efficient). But it was designed to run at those temps (which are not too high, by the way) and be safe while doing so. I see those temps all the time on 6.6's.
     
    Last edited: Mar 2, 2017
  4. RidgeRunner

    RidgeRunner New Member SILVER Sponsor

    185
    Jan 25, 2017
    Chesapeake VA
    Amberjack w/ Fishing Package. Full Camper Pkg. 3 ax. Trler. Standard Horizon 2200 VHF w/AIS No Mid
    Single 350 MAG MPI B3
    Thanks for the feedback guys. My heart rate changed, as well as my towing plans when I first saw the temp gauge. Very pleased to see this is the normal
     
  5. BlewByYou88

    BlewByYou88 Member SILVER Sponsor

    944
    Jul 24, 2010
    Arizona
    268 Sea Ray Sundancer 1988
    2X 4.3L 4bbl Mercs w/ Alphas
    Ya, I'm running an 06, (6.6 LBZ) she gets about that same range when towing up north. My Tranny temps get up there a little too. Mu buddy found on a forum where you can flip the tranny cooler to be in the very front of the other coolers (Intercooler, and radiator) to get cooler tranny temps)....Still need to do it to mine.
     
  6. bbwhitejr

    bbwhitejr Well-Known Member SILVER Sponsor

    Apr 14, 2013
    Lake Lanier GA
    2007 44DB
    Cummins QSC 8.3s
    I have an '07 Duramax/Allison LMM. Mine runs 210* 99.9% of the time whether I am towing my '06 260DA or not. Occasionally when it is really cold, it will run in the 190* range. My transmission runs 100* over the outside temps when towing. If it is 95* outside, seeing 195* is common. Fluid and spin on filter changed every 50k miles and never an issue. Fluid always looks brand new, but makes me feel better.....

    Bennett
     
  7. RidgeRunner

    RidgeRunner New Member SILVER Sponsor

    185
    Jan 25, 2017
    Chesapeake VA
    Amberjack w/ Fishing Package. Full Camper Pkg. 3 ax. Trler. Standard Horizon 2200 VHF w/AIS No Mid
    Single 350 MAG MPI B3
    I'm feeling better about this all the time!
     
  8. cfd95

    cfd95 Member

    240
    Nov 5, 2013
    Northport Long Island
    2002 310 Sundancer
    350 Horizons
    V Drives
    This was a problem for the 05 LLY motors. (running hot or overheating when towing)
    GM had a tech service bulletin for it.
    Here is the bulletin
    http://ww2.justanswer.com/uploads/jettadan1/2010-12-06_174625_overheating.pdf

    Gm corrected the problem in 06 with the LBZ Motor with a larger fan and radiator

    210 is not overheating
    I have an 07 classic with the LBZ it will run 210 on a hot day with the a/c on.
    A rule of thumb for Transmission temps on these is they usually run 100 degrees hotter than the outside air temp.
     
  9. SCORPIO

    SCORPIO Active Member SILVER Sponsor

    Apr 7, 2008
    Delaware
    1989 300 DA
    Twin 5.7 Merc Alpha I
    It's normal for any engine to run slightly hotter when performing more work. So long as you are staying in the normal range of operation for your engine, it is perfectly normal and expected. I see similar increases in temps when towing heavy with my Powerstroke, but still in normal range so no worries.
     
  10. BurgundyS24

    BurgundyS24 Member

    426
    Oct 5, 2014
    Napa, CA
    Sea Ray S24. full delta enclosure. Towed by 2007 Chevy 3500 duramax/allison combo.
    350 with closed fresh water cooling
    Have an 07 lbz as well. Runs 210 all day long. Glad I'm not in the 05 truck as I pull a trailer constantly


    Sent from my iPhone using Tapatalk
     

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