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Thread: car overheating

  1. #1
    Silver97
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    Default car overheating

    The temperature in my car has been rising beyond the normal limits....it is about 5 degrees from hitting the red zone....I checked the codes and there were none...i checked the fans and they are working....checked the radiator fluid and it is ok....should I change the thermostat? If so how do I do it??? what else could be causing this problem???

    help?????

    97 corvette 72,000 miles automatic.....


    Thank you

  2. #2
    medicine man
    Guest

    Default

    Hi
    Have you checked front of radiator for trash inhibiting air flow thru radiator. just a thought

  3. #3
    Member bluecoupe's Avatar
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    Corvette(s)
    former C3&C5- future C7 when jr's college is paid

    Default

    Quote Originally Posted by Silver97
    The temperature in my car has been rising beyond the normal limits....it is about 5 degrees from hitting the red zone....I checked the codes and there were none...i checked the fans and they are working....checked the radiator fluid and it is ok....should I change the thermostat? If so how do I do it??? what else could be causing this problem???

    help?????

    97 corvette 72,000 miles automatic.....


    Thank you
    WARNING!!!!
    *****BE CAREFUL... DON'T GET BURNED... HIGH PRESSURE... HOT FLUID... STEAM...
    If you are not comfortable doing this take it to the dealer or a good repair shop.


    Engine Overheating
    Step
    Action
    Y =Yes
    N = No

    1
    Inspect for a missing or damaged radiator upper baffle and/or center air deflector.
    Is the baffle or deflector missing or damaged?
    Y Go to Step 8
    N Go to Step 2

    2
    Inspect for a loss of coolant.
    Is there a loss of coolant?
    Y Go to Step 3
    N Go to Step 4

    3
    Fill the system to the specified level. Refer to Loss of Coolant .
    Does the engine overheat?
    Y Go to Step 4
    N System OK

    4
    Inspect for low coolant protection. Refer to Coolant Concentration Testing .
    Is the coolant to the correct concentration?
    Y Go to Step 5
    N Go to Step 8

    5
    Inspect for a loss of system pressure. Refer to Cooling System Leak Testing .
    Is there a loss of system pressure?
    Y Go to Step 8
    N Go to Step 6

    6
    Inspect for a faulty engine coolant temperature (ECT) sensor. Refer to Engine Coolant Temperature (ECT) Sensor Replacement in Engine Controls.
    Is the sensor operating properly?
    Y Go to Step 7
    N Go to Step 8

    7
    Inspect for a cracked coolant surge tank or a leaking hose. Refer to Loss of Coolant .
    Is the surge tank cracked or is the hose leaking?
    Y Go to Step 8
    N Go to Step 3

    8
    Repair or install new parts as necessary, then retest.
    Does the engine overheat?
    Y Go to Step 9
    N System OK

    9
    Inspect for incorrect drive belt tension. Refer to Drive Belt Tensioner Replacement - Accessory in Engine Mechanical.
    Is the belt tension correct?
    Y Go to Step 10
    N Go to Step 8

    10
    Inspect for a damaged water pump driveshaft.
    Is the water pump driveshaft damaged or is the seal leaking?
    Y Go to Step 8
    N Go to Step 11

    11
    Inspect for obstructed radiator air flow or bent radiator fins.
    Is the radiator air flow obstructed?
    Y Go to Step 8
    N Go to Step 12

    12
    Inspect for blocked cooling system passages.
    Are the cooling system passages blocked?
    Y Go to Step 8
    N Go to Step 13

    13
    Inspect for improper direction or inoperative cooling fans. Refer to Cooling Fan Motor Replacement - Electric .
    Are the cooling fans and the motors operating correctly?
    Y Go to Step 14
    N Go to Step 8

    14
    Inspect the thermostat. Refer to Thermostat Diagnosis .
    Is the thermostat stuck in the closed position?
    Y Go to Step 15
    N Go to Step 16

    15
    Replace the thermostat. Refer to Thermostat Replacement .
    Does the engine overheat?
    Y Go to Step 16
    N System OK

    16
    Inspect the radiator cooling capacity.
    Is the proper sized radiator being used on the vehicle?
    Y Go to Step 3
    N Go to Step 17

    17
    Consult the current parts catalog and replace the radiator. Refer to Radiator Replacement .
    Is the repair complete?
    Y System OK

  4. #4
    Moderator vetteboy86's Avatar
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    1986 Black "Indy 500 Pace car replica"

    Default

    Blue coupe, very informative post. Kind of looks like a C++ program I wrote last semester for class. Silver97 you shouldn't have to change the thermostat, unless you suspect it is faulty. There is something that is not allowing the cooling system to do it's job right.


    Craig

  5. #5
    '04 Torch Red
    Guest

    Default

    Quote Originally Posted by Silver97
    The temperature in my car has been rising beyond the normal limits....it is about 5 degrees from hitting the red zone....I checked the codes and there were none...i checked the fans and they are working....checked the radiator fluid and it is ok....should I change the thermostat? If so how do I do it??? what else could be causing this problem???

    help?????

    97 corvette 72,000 miles automatic.....


    Thank you
    Silver97...before you do unnessary things..try this first...see if there is any air in the system...you can let the air out of a bleed screw on the water pump...that may very well be your problem...air not bled out of the system can cause overheating...

    Also check to see if you have a 50/50 mixture...too much antifreeze can cause overheating also...

  6. #6
    Member cruzer99's Avatar
    Join Date
    Aug 2002
    Location
    Granite Falls, N.C. USA
    Posts
    725
    Corvette(s)
    99 Navy Blue Pearl Vert. NCRS Member

    Default

    When you inspect the radiator make sure you are looking at the radiator and not the A/C cooler. The A/C sits in front of the radiator and many times all kinds of stuff will get between the two and will block air from getting to the radiator.


  7. #7
    Silver97
    Guest

    Default

    Thank you all for your advice

    I replaced the thermostat and it looks like it solved the problem...actually it was really easy to do...

    thank you all fo ryour help

  8. #8
    DRTH VTR's Avatar
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    May 2002
    Location
    Boise, Idaho
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    Corvette(s)
    2002 electron blue Z06

    Default

    Quote Originally Posted by Silver97
    Thank you all for your advice

    I replaced the thermostat and it looks like it solved the problem...actually it was really easy to do...

    thank you all fo ryour help
    I had a '97 that overheated, and replacing the thermostat fixed the problem.
    Save the Wave!

  9. #9
    Moderator vetteboy86's Avatar
    Join Date
    May 2003
    Location
    IN
    Posts
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    Corvette(s)
    1986 Black "Indy 500 Pace car replica"

    Default

    Silver97,

    Glad to hear that you are not overheating anymore. It is great when we all get together and help. This site and the people on it are great.

    Craig

  10. #10
    Silver97
    Guest

    Default

    That is true.. this site is a great resource for all of us

  11. #11
    '04 Torch Red
    Guest

    Default

    Quote Originally Posted by Silver97
    Thank you all for your advice

    I replaced the thermostat and it looks like it solved the problem...actually it was really easy to do...

    thank you all fo ryour help

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