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  1. #1

    Default overheating problem 2004 silverado

    My 2004 silverado overheats replaced all componets water pump,clutch fan, thermostat, flushed radiator, still overheating, I replaced the fan clutch with a flx-292 electric fan and still overheats. Do any of you have any suggestion of what might be the cause of this problem.

    Thanks,
    Cerros
    Imperial Valley, Ca
    josecerros97@earthlink.net

  2. #2

    Default

    Have you pressure checked the system for leaks?
    Are you getting antifreeze in the oil or oil in antifreeze?
    After replacing the parts was the system properly refilled to prevent air bubbles, particularly in the heater core?
    Is antifreeze flowing sufficiently while the engine is running to indicate no system blockages?

  3. #3

    Default

    Quote Originally Posted by tbplus10 View Post
    After replacing the parts was the system properly refilled to prevent air bubbles, particularly in the heater core?
    Is antifreeze flowing sufficiently while the engine is running to indicate no system blockages?
    Good call! An air lock would definetly cause overheating...
    www.gmpartsclub.com



    Jamie

    2007 Ford E250(Work van) (Ya, Ya, shut up!)
    1996 GMC Sierra SLE 1500 5.7L/4L60E

  4. #4
    Legend unplugged's Avatar
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    Default Head gasket?

    Sounds like you've swapped everything else so I would test for combustion gas in the radiator. You can get a kit like the one from Lisle tools from NAPA or your local parts store. This will identify more serious trouble like a head gasket leak or cracked block/head.
    There is no way to happiness....happiness is the way.:yipi:
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    High Desert SoCal
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  5. #5

    Default

    this may sound dumb, but what about the raditor cap? did you replace it? i seen many systems overheat due to this issue. the seal is bad and does not allow the system to prusure up some and overheat.......mike
    Michael Collins
    1993 4X4 Suburban
    many other toys as well

  6. #6

    Default

    did you burp the system if its like the 99 i did my like the chilton manual says which i cant remember off the top of my head but you have to run it a few thousand rpm and let drop and then bring up again and let it drop then shut if off and burp the system then do it again and it worked fine my truck hasnt gone over since been fine.

  7. #7
    Jr. Apprentice CaJuN625's Avatar
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    Pleasant View, UT
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    21

    Default I agree - replace the radiator cap, too.

    This is normally a closed system under pressure. The added pressure helps keep the fluid from boiling. Boiling means vapor in the system - vapor means hot spots and could mean starving water pump, too.

    Besides, it's only $10 at the parts store.
    CJ
    Pleasant View, UT

    1998 Tahoe LT 4dr 4wd
    2004 GMC 2500HD CC / SB

  8. #8

    Default

    Quote Originally Posted by CaJuN625 View Post
    This is normally a closed system under pressure. The added pressure helps keep the fluid from boiling. Boiling means vapor in the system - vapor means hot spots and could mean starving water pump, too.

    Besides, it's only $10 at the parts store.
    assuming you found the problem! I suggest you try Water Wetter from Red Line. This stuff works amazingly! I have on my cooling system and it does work. I dropped around 25 degree!! make sure the ratio is 80% water and 20% anti freez.

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