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Thread: Water Temperature gauge question

  1. #1
    Join Date
    May 2022
    Location
    Los Angeles Califoirnia
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    41

    Water Temperature gauge question

    So I finally got to drive my MM in Oregon today…very happy! Question on coolant temperature - outside temp today is 90 plus, AC on full, temp gauge sits right above half. On the freeway, doing 65 mph, it rose to about 3/4 or slightly more, and then proceeded to drop again after a few minutes. Is this the fan coming on? Coolant was replaced by the Ford dealer here in Beaverton a couple of weeks ago.

    Is this about normal on a hot day?

    Thanks

  2. #2
    Join Date
    Feb 2006
    Location
    Rosemount, MN
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    59
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    2,187
    My guess is there is air in the system after then coolant change.

  3. #3
    Join Date
    Jun 2008
    Location
    Waukesha, WI
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    1,604
    Follow this procedure to burp coolant system

    https://www.reischeperformance.com/refill.html
    You "feel" the difference because you want to "feel" the difference. Since you just spent money on the upgrade you "have" to feel the difference

    I'm looking to eliminate the double pump process I have to follow right now to get the pedal hard

    2004 300A Procharger #0010 D1X
    2003 300A Procharger #0017 D1SC (SOLD. Last I heard, it was in Washington State)

  4. #4
    Join Date
    Oct 2004
    Location
    Cape Cod, MA
    Age
    67
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    2,601
    My coolant temp gauge after warm up stays at just a hair over half. As engine temps rise the auxiliary fan should turn on via temp sensor. As mentioned check system for air in system.
    2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
    2003 marauder black 28,000 miles all stock. Garage Queen.
    2004 marauder red daily driver.

  5. #5
    Join Date
    May 2022
    Location
    Los Angeles Califoirnia
    Posts
    41
    Here is the update - system was checked for air, and it was OK. Temp was still rising, so fan operation was checked and it was running at 98%, so that was good. Tech thinks its a defective thermostat, that is sticking, and not opening all the way at times. New thermostat goes in tomorrow, so we shall see! Thanks for your suggestions.

    Installed the Marty Tune, and its awesome!

  6. #6
    Join Date
    Aug 2011
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    TALALA OK.
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    71
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    Easy to get the wrong one from the parts store. Original Motorcraft is RT-1110 188 degree. Stant 14138 is 180 degree.
    73TORINO SPORT 112K M. BOUGHT NEW
    04 DTR 42K M.
    03 BLK 9K M.
    07 GT500 10K M.
    98 MARK VIII 70K M. BOUGHT NEW
    21 EXPLORER PLATINUM 3.0
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    78 RANCHERO 5.0
    54 GMC

  7. #7
    Join Date
    Jun 2011
    Location
    Northeast OH
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    7,999
    ....Napa 109
    2004 SB Ported Trilogy 48
    Has supporting mods and stuff
    Thanks to Marty O for his help in updating this car.

    R.I.P.
    Rex "SC Cheesehead"

  8. #8
    Join Date
    May 2022
    Location
    Los Angeles Califoirnia
    Posts
    41
    Thanks, yes have confirmed the part number with the shop…

  9. #9
    Join Date
    May 2022
    Location
    Los Angeles Califoirnia
    Posts
    41
    The cooling system blues continue….while the car was on the rack, it was noticed that the radiator has a pinhole leak, that seems to spray coolant when under pressure, so a new radiator is being installed!

  10. #10
    Join Date
    Aug 2011
    Location
    Wisconsin
    Posts
    4,338
    Classic symptoms of radiator restricted due to bugs/gunk. Pull shroud and flush/clean radiator fins with gentle pressure - not full blast pressure washer pressure. Clean the radiator and a/c condenser and then try the highway again. Good luck!

    WLB
    BB#1) 1996 ImpalaSS - 16,500 miles - 100% stock
    ______________________________ ___________

    BB#2) 2003 Marauder (300a) - 34k miles - Daily Driver
    #2912 of 7093
    Conceived 8/6/2002
    Delivered 9/19/2002
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