Thread: Heat trouble

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  1. #1 Heat trouble 
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    I have an 05 grand prix with the 3.8 liter naturally aspirated engine and have been having trouble with intermittent heat.The heat can be fine for a day or two and then the coolant temp will drop as will the heat coming from the heater. I have put in a new thermostat, bleed the system and topped up the coolant but still the same. The engine oil is its normal color. I removed the rad cap with the engine running but did not see any bubbles in the coolant.I removed three spark plugs from the front of the engine and they were a little white.Any help would be appreciated.
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  2. #2 Re: Heat trouble 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Is the new T-stat stock temp?
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  3. #3 Re: Heat trouble 
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    yep it is 195 f
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  4. #4 Re: Heat trouble 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    I'd say it might be your resister, but the white plugs kind of make me think it could be a bad gasket somewhere...
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  5. #5 Re: Heat trouble 
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    yeah i was thinkin it may be a bad head gasket but hopin its not
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  6. #6 Re: Heat trouble 
    I AM PEWPIN! rynoman03's Avatar
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    Check the lines on your heater core. If ones cold and ones hot you have a plugged heater core.
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  7. #7 Re: Heat trouble 
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    Yeah i checked the lines to the heater core and one was hot and the other was only warm.
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