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Random overheating

This is a discussion on Random overheating within the GTO forums, part of the Vehicle Specific category; This happens when I'm just driving around the neighborhood and not really getting on it. When I start to slow ...

  1. #1
    Insurgent Hunter dethinboots's Avatar
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    Impulse Blue
    2005 a4 GTO

    Random overheating

    This happens when I'm just driving around the neighborhood and not really getting on it. When I start to slow down and near parking the temp gauge starts to climb. I'm guessing this is a thermostat issue but not completely sure. And help would be greatly appreciated.
    2005 Impulse Blue GTO
    Kooks Longtube Headers (off-road mids) , SLP Loudmouth II Catback, Vararam OTRCAI, MSD Spark Wires, 238/242 .595, Trickflow 225cc Heads, SLP 25% UD Pulley, Breather, Elite Engineering Catch Can, 3200 TC,Hayden Trans Cooler, P&P TB, Dyno tune by Sunshine Performance

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    Former Mopar Man 2002ssslp's Avatar
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    Silver & Blue
    02 Camaro SS, 04 GTO

    Your radiator may be clogged with debris. Take a hose and wash out the fins to see what comes out. If air can't pass through then there is little or no cooling effect. Plus it a free solution.
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

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    Member RONS98TA's Avatar
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    BLACK
    1998 PONTIAC TA

    Clean radiator with a garden hose, shooting the water from the engine compartment, toward the front of the car. Also make sure the cooling fans are coming on. Next I would check to make sure the thermostat is opening, but you say while driving at speed it runs at the correct temperature. This makes me think the fans arent working, and the t-stat is ok.

  4. #4
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    Well it is most likely due to the extreme high temps of Ft Hood area. Pushing around the upper 90's to 100's.

    Check to make sure you haven't sucked up a plastic bag and airflow isn't restricted.

    As long as it isn't over heating you are good. If it starts to really bug you try a 165* T-stat. It fulley opens around 170 vs the 190-195* the stock one does.

  5. #5
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    '02 WS.6 / '07 Suburban

    Are your fans coming on?

  6. #6
    Insurgent Hunter dethinboots's Avatar
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    Fans work just fine and the radiator is newish. I'm thinking the t-stat if the new radiator didn't come with one, or the under drive pulley not moving the water pump well enough. It has been mid 90's to low 100's here lately.

  7. #7
    Insurgent Hunter dethinboots's Avatar
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    Impulse Blue
    2005 a4 GTO

    Also noticed that when the needle starts to climb, revving to higher rpms while parked cause the temp to go back to normal.

  8. #8
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    '02 WS.6 / '07 Suburban

    How much under drive... 10% ?

  9. #9
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    While parked, start the car with the radiator cap off to see if you have a possible air lock. Also, how long has this been happening as there is an issue with the clusters spiking in the red.


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