Thread: begining to overheat

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  1. #1 begining to overheat 
    GT Level Member mezzoni's Avatar
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    so i notice some odd noises coming from my car, swear under my breath a couple of times and keep driving. about 10 minutes later at a stop light i notice my temp. is up to about 245-250. HOLY SH!T so i start to drive and it instantly cools down to about 215-220ish. long story short it stayed pretty much between 210 and 250 between stop and go, 30mph, and 70 mph on the highway. and it would flucuate like crazy. i can look at it for literally no more than 10 seconds and it would go from 210 to 250 or viseversa. now for about the last week my low coolant light has been coming on but didnt when i noticed this happening. so obviously time for a coolant flush/top off but is it possible a sensor is bad or i have more issues beyond just these?
    2006 pontiac G6 GT coupe - the daily
    2001 pontiac trans am WS6 - pacesetter headers, slp exhaust, diablo sport tuner, ported throttle body, ported MAF, SLP intake lid, B&M shifter, UMI panhard bar, lowered on koni's
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  2. #2 Re: begining to overheat 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    low coolant or air in system are my guess's

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  3. #3 Re: begining to overheat 
    GrandPrix Junkie machinegunsquid's Avatar
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    Yep, mine did that earlier this week, GF was driving the car, and a hose broke (overflow hose) which let coolant leak out whenever it was at operating temp (usually 185ish)
    I took it for a spin after putting a new hose in it, and it did the same thing you're talking about.

    All I did was flush the system, and fill'er up, and its been perfect since.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  4. #4 Re: begining to overheat 
    GT Level Member Jakescoots's Avatar
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    there is an elbow that commonly blows out that has coolant run through it
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  5. #5 Re: begining to overheat 
    GT Level Member mezzoni's Avatar
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    my dad said to flush it but to bring it somewhere and do it so it looks like thats what i'll do. and there must've been a leak because there is sealent dumped in there from the previous owner. im just gonna bring it somewhere and have it done so it gets everything flushed out, in the block and stuff, not just the radiator. is that what you did? i just dont wanna spend the money
    2006 pontiac G6 GT coupe - the daily
    2001 pontiac trans am WS6 - pacesetter headers, slp exhaust, diablo sport tuner, ported throttle body, ported MAF, SLP intake lid, B&M shifter, UMI panhard bar, lowered on koni's
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  6. #6 Re: begining to overheat 
    The mod from over yonder TheOtherNick's Avatar
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    Try bleeding the system first.
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
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  7. #7 Re: begining to overheat 
    GrandPrix Junkie machinegunsquid's Avatar
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    No, I did mine myself. I used a high pressure hose attached to a heater core line, with the heater on full blast. It cleans everything out really nice, and is essentially free.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  8. #8 Re: begining to overheat 
    GT Level Member mezzoni's Avatar
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    well heres the update so far, i poured in a bunch of coolant, the temp. problem seems for now to be fixes. it didnt top 210 at all and was mostly at about 190 or so.however the noise is still there and seemed to have gotten a little worse. its a really weird sound, its almost like i tick or a tisk its really hard to describe tho. you can hear it at idle with the hood up and if your looking at the engine it sounds like its coming from the back left, so by the belt. my dad said it might be my power steering pump, which has always made noises but that i think is just because the fluid was a little low. when im driving its loud enough to hear from inside the cabin and i noticed when i accelerate or am on the pedal it seems to get a little bit louder. any idea on what that can be?
    2006 pontiac G6 GT coupe - the daily
    2001 pontiac trans am WS6 - pacesetter headers, slp exhaust, diablo sport tuner, ported throttle body, ported MAF, SLP intake lid, B&M shifter, UMI panhard bar, lowered on koni's
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  9. #9 Re: begining to overheat 
    SE Level Member chev1988rolet's Avatar
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    if its a tisk it could be an exhaust leak from flange or loose spark plug wire or spark plug on rear bank of engine
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  10. #10 Re: begining to overheat 
    GT Level Member mezzoni's Avatar
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    the thing is its not constant, wouldnt that be constant? and i doubt its a exhaust leak my fuel mmileage hasnt dropped of any
    2006 pontiac G6 GT coupe - the daily
    2001 pontiac trans am WS6 - pacesetter headers, slp exhaust, diablo sport tuner, ported throttle body, ported MAF, SLP intake lid, B&M shifter, UMI panhard bar, lowered on koni's
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  11. #11 Re: begining to overheat 
    SE Level Member chev1988rolet's Avatar
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    depends on how much its leaking. you can take the belt off and turn on the engine. if it still makes the noise then you know its none of the accessories. you gotta think of the part of the engine that would make a ticking or tisking sound. Does the computer throw a misfire code?
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  12. #12 Re: begining to overheat 
    GT Level Member mezzoni's Avatar
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    i dont know, how do i even get that checked? just go to autozone and say "hey, scan my car for a code" ? is that a free service they offer?
    2006 pontiac G6 GT coupe - the daily
    2001 pontiac trans am WS6 - pacesetter headers, slp exhaust, diablo sport tuner, ported throttle body, ported MAF, SLP intake lid, B&M shifter, UMI panhard bar, lowered on koni's
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  13. #13 Re: begining to overheat 
    GT Level Member mezzoni's Avatar
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    btw, the check engine or service engine soon light is not on
    2006 pontiac G6 GT coupe - the daily
    2001 pontiac trans am WS6 - pacesetter headers, slp exhaust, diablo sport tuner, ported throttle body, ported MAF, SLP intake lid, B&M shifter, UMI panhard bar, lowered on koni's
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  14. #14 Re: begining to overheat 
    SE Level Member chev1988rolet's Avatar
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    Yea just ask them to check your car for codes. and the light isn't always on when a code is stored in the memory
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  15. #15 Re: begining to overheat 
    GT Level Member mezzoni's Avatar
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    oh alright thanks for the pointers my man ill be sure to do it
    2006 pontiac G6 GT coupe - the daily
    2001 pontiac trans am WS6 - pacesetter headers, slp exhaust, diablo sport tuner, ported throttle body, ported MAF, SLP intake lid, B&M shifter, UMI panhard bar, lowered on koni's
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  16. #16 Re: begining to overheat 
    GTP Level Member SnowDrift's Avatar
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    If not an exhaust leak, then it could be a lifter ticking - not too uncommon after several years of service if the valves haven't ever been adjusted. Not sure how easy it is to do on these motors, sitting in there sideways, but you might try to pop the valve cover off you're hearing the noise from and start the engine to see if you can isolate it. If you're not comfortable with that, then find out what the torque spec. is for the rocker arms and torque as necessary (this is a much cleaner way to do it, if you can).
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  17. #17 Re: begining to overheat 
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    EGR Valve. Plenum needs to be replaced possibly. If it starts chugging coolant... that's your problem.
    Fiske
    95 Taurus SHO ATX - 121K
    99 Audi 2.8 Quattro - 113K
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