Thread: 2004 Grad prix GT2`

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  1. #1 2004 Grad prix GT2` 
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    My temp seems to hoover aroond halfway whenever i idle in traffic and will go just a line or 2 below when driving (is this normal for this car). I changed my Thermastat and drained the old fluid and added Proestone DEX 50/50. any suggestions?
    Last edited by wjr66; 08-19-2013 at 02:10 PM.
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  2. #2 Re: 2004 Grad prix GT2` 
    I live here. 02NavyBlue's Avatar
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    Is this about where it's at?
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
    2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits.
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  3. #3 Re: 2004 Grad prix GT2` 
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    yes
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  4. #4 Re: 2004 Grad prix GT2` 
    I live here. 02NavyBlue's Avatar
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    Do the fans come on around that area? I have an 02, so different gauges. But if the lines are the same, that would be 210°F on my gauge.
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
    2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits.
    Sold.
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  5. #5 Re: 2004 Grad prix GT2` 
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    On a related note: I recently installed a hayden 403 inline and have been on one significant road trip. The highest long distance temps I saw were:

    - Highway speed steady at 65mph
    - Air Temp at 80 degrees
    - Engine temp at exactly 1/2 (almost the exact same location as yours)
    - Transmission temp @ 174 degrees

    Do these conditions seem ok? The only reason I ask is the engine temp struck me as a little high but I'm likely just paranoid. I was curious if the additional heat coming off the 403 could decrease the radiator effectiveness and increase the engine operating temp.
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  6. #6 Re: 2004 Grad prix GT2` 
    I live here. 02NavyBlue's Avatar
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    Engine at half is 200°, which is basically perfect in summer temps. Trans temps at 174 is perfect as well. They will go up in city driving, but around 170° is ideal for trans, over the 220° with the stock cooler

    The trans being cooled separately won't affect engine temps much, maybe let it be a slight bit cooler, not really noticeable.
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
    2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits.
    Sold.
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  7. #7 Re: 2004 Grad prix GT2` 
    GTP Level Member 1ATony's Avatar
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    Welcome to the site

    Tony
    1aauto.com
    SALES 888-844-3393
    Shop Here For: Grand Prix Parts
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