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Thread: car overheating, need help

  1. #1
    Join Date
    Apr 2004
    Location
    DFW
    Posts
    372

    Default car overheating, need help

    So we changed my aux fan, and rebled the coolant system. I'm driving my baby again and its just a roaring good time. I tore off a couple times down the road and I'm feeling great. I hit the highway for some more fun, (with the AC cranked for testing purposes) and it begins again. The car overheats when I'm at highway speeds. In the city its ok. At a stoplight or whatever, it begins cooling off. If I turn on the heat, it cools off a bit.


    Why? Is it low on coolant? Right now, its cooling off. When its cool again, I'm going to check oil/coolant levels. The engine is at 100% still pulling strong and torquey down low. Maybe I need better coolant? I'm so confused and frustrated. Please help, I'm so damn tired of driving that F150. Such a soulless vehicle.

  2. #2
    Join Date
    Jan 2006
    Location
    Ga
    Posts
    155

    Default

    Im not sure what youve checked already but heres a couple ideas:
    -The small little return hose from the res. to the radiator.
    -Possible headgasket situation? Any coolant smeel from exhaust or excessive pressure in cooling system?
    -Im assuming water pump is new?
    What all has been done already?

    -Ben

  3. #3
    Join Date
    Apr 2004
    Location
    DFW
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    372

    Default

    Quote Originally Posted by BlueM60
    Im not sure what youve checked already but heres a couple ideas:
    -The small little return hose from the res. to the radiator.
    -Possible headgasket situation? Any coolant smeel from exhaust or excessive pressure in cooling system?
    -Im assuming water pump is new?
    What all has been done already?

    -Ben
    • Water Pump is new
    • Tstat is new


    What about the return host from the res to the rad? It was leaking, I *might* need a new one. Its connected and not leaking now as far as I can tell. The HG is good as far as I can tell. I can smell coolant when it gets really hot.

  4. #4
    Join Date
    Jul 2006
    Location
    fort myers, florida
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    1

    Default

    How well did you bleed the system ( sometimes you have to bleed the system a number of times). Sometimes there is still air in the system and it will continue to cause the car to overheat. I had the same problem and just bled the system about 20 minutes.
    Raymond Briggs

  5. #5
    Join Date
    Oct 2004
    Location
    Honolulu
    Posts
    3,105

    Default Re bleed it

    you have trapped air in the system.

    try again with the heater on, the car parked front end up a hill or ramps to elevate the front.

    If you have any blind plugs on the top of the water neck try to remove one while the car is cold and pour coolant into it to fill the head.


    Vee ave vays of dealing vid your kind...........

  6. #6
    Join Date
    Dec 2003
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    PA
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    Default

    did i read that you said you can smell coolant in the exhaust?

  7. #7
    Join Date
    Apr 2004
    Location
    DFW
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    Default

    no, maybe I shouldn't have said that. I can't smell coolant when I'm driving the car, nevermind.

    I did when I had a leaky hose from res to radiator.

  8. #8
    Join Date
    Jan 2006
    Location
    Ga
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    Default

    I agree its very possible theres still air trapped in the system. the reason I mention the small return hose is that its very common for it to be totally clogged somehwere in the line, causing all kinds of wierd overheating issues.
    If its leaking, replace it anyway. If it can be salvaged, try blowing through it with compressed air and see if any crud comes out.

    -Ben

  9. #9
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
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    Default

    I'm not sure but did anyone mention bleeding it again, and on ramps or up a hill? those be some buggy bleeders.
    95 E34 530I V2.34
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  10. #10
    Join Date
    Oct 2004
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    Honolulu
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    Default ooh, ooh I did

    can I go to recess now ?


    Vee ave vays of dealing vid your kind...........

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