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tacos got an overheating issue

Discussion in '2nd Gen. Tacomas (2005-2015)' started by jgray, Aug 27, 2011.

  1. Aug 27, 2011 at 12:52 PM
    #1
    jgray

    jgray [OP] Well-Known Member

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    lastnight in the mickey d's drive thru i had the ac on low n then noticed the temp guage was near pegged so i quick fast started blasting the heat to take as much heat away from the motor as possible. i cut it off n let her cool down started her back up n had the ac and everytghing off n she stayed at normal temp till i got home then ran her with the ac on to see what she would do n she ran fine. would this be signs of my thermostat and or waterpump goin bad ??
     
  2. Aug 27, 2011 at 12:56 PM
    #2
    baja820

    baja820 Well-Known Member

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    How long has it been since you changed the radiator fluid?
     
  3. Aug 27, 2011 at 1:07 PM
    #3
    joes06tacoma

    joes06tacoma Well-Known Member

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    Sounds like a fan clutch to me. Fan comes into play at speeds below 30MPH.
     
  4. Aug 27, 2011 at 1:16 PM
    #4
    dYL0n

    dYL0n ระดับอาวุโส สมาชิกอาวุโส

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  5. Aug 27, 2011 at 1:23 PM
    #5
    joes06tacoma

    joes06tacoma Well-Known Member

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    I will state the obvious just in case: Have you checked the fluid level in the radiator? Not the overflow, the actual radiator.

    I did have one overheating episode on my old 86 Toyota truck that occurred right after a long highway drive with a half empty radiator. It ran fine on the highway, overheated sitting in traffic in town after exiting the highway. I had a leak in my headgasket and due to the leak, it wasn't pulling a vacuum in the radiator and sucking coolant back in after the motor was shut off.
     
  6. Aug 27, 2011 at 2:55 PM
    #6
    JKD

    JKD Well-Known Member

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    Airflow obstruction, radiator hoses, fluid level, fan clutch, temp sensor, thermostat. I'd check them in that order, since they go from easiest to hardest to check.
     
  7. Aug 27, 2011 at 8:49 PM
    #7
    jgray

    jgray [OP] Well-Known Member

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    Yea fluid is level all hoses are good no visible leaks but drove her today n nothing came up lol had to use ac too defog windshield. Thanks guys for all the input!!
     
  8. Aug 27, 2011 at 10:18 PM
    #8
    JKD

    JKD Well-Known Member

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    I'd be tracking that issue down. If everything else checks out, change the thermostat.
     
  9. Sep 3, 2012 at 10:48 AM
    #9
    pikuptruk

    pikuptruk Well-Known Member

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    Yesterday I was driving about 6 hours on the highway. It was about 90 degrees out. I was blasting the AC and noticed my temp gauge getting pegged as well. Without AC it cooler but not where it needed to be. I have a 2001 2.7l 4x4. Any suggestions?
     
  10. Sep 3, 2012 at 10:59 AM
    #10
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    Some good suggestions so far on what to check. The 1st gen Tacoma trucks do seem to have a propensity to have sticky thermostats. If all other conditions check normal, and the overheating is intermittent, then you MAY be looking at a sticky thermostat. Not a difficult or time consuming repair.
     
  11. Sep 3, 2012 at 5:26 PM
    #11
    pikuptruk

    pikuptruk Well-Known Member

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    Ya there was some good suggestions. I know if the fan clutch isn't working, the fan won't work or it makes awfull stretching sounds as it spins. This I know because I have replaced them on yotas before. I thought about flushing the fluids... But I doubt that would make that big of a difference. Thermostat seems to be the most obvious choice, however wouldnt overheat almost constantly? Not just on a hot day?
     
  12. Sep 4, 2012 at 7:50 AM
    #12
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    an intermittently sticky thermostat would not always overheat. Sometimes it would open fine, other times it would stick closed and cause an overheating condition. A thermostat opens "inward" so if it stuck, and the temp increased, developing a higher pressure, it would actually help keep the thermostat closed, resisting the thermostat from opening. Unfortunately that is how a thermostat is designed, and has been for years. If you look at it, and how a thermostat actually works, you will realize that there isn't much of anything on the design side that you can do.
     
  13. Sep 4, 2012 at 9:48 AM
    #13
    pikuptruk

    pikuptruk Well-Known Member

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    That explanation helps. I suppose it is the best place to start... And usually the cheapest. Thank you!
     
  14. Oct 8, 2012 at 4:37 PM
    #14
    2010TRD

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    I have this same issue in my 2010 4x4

    In Florida wheeling (mostly 2wd) with AC blowing full blast , cause its 90+ degrees outside

    Within 10-15min my AC compressor will kick off, as my water temp reaches 220+
    AC blows warm air

    If I continue to wheel on at slow speeds (under 15mph) then the water temp continues to climb

    Ive had my truck in 3 toyota dealerships to have this issue adressed under warranty...
    All 3 shops came up with clean bill of health.....saying they see no concerns
    I had them specifically check the fan, flush radiator... Havent been able to convince them I need a new water pump
    :annoyed:
    Even hot summer days stuck in traffic, my AC quits working and water temp climbs above 220+

    HELP !!!!

    Ive over heated once while offroad (before I got a scanguage with alarm)
    Dont want to do it again

    As it is I have to stop often (while offroading) and run the heater to keep water temp around 200

    Normal highway speeds (30+mph) and all is fine, I can blast the AC and water temp stays at 195

    Ive only owned a V6 tacoma since Feb 2012.... and been offroad with it only this summer
    So im unsure if I will continue to have this issue during winter months
     
  15. Oct 8, 2012 at 4:44 PM
    #15
    2010TRD

    2010TRD Well-Known Member

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    Not loosing any water
    no leaks
     
  16. Oct 8, 2012 at 6:09 PM
    #16
    aficianado

    aficianado Well-Known Member

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    most of my overheating issues has been the radiator cap. they cant hold press and let the thing blow over.

    i change that first. second step..get a pro to pressure test it.
     
  17. Oct 8, 2012 at 7:24 PM
    #17
    iroh

    iroh Well-Known Member

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    There's definitely an issue there, although there's no flow regulation in the water pump to blame - either it's spinning or it's not, it's leaking or it's not.

    I ran early summer (when it was so blasted hot here) with the upper grill 100% blocked and even with AC in capitol city traffic I reached a high temp of 194F. I could hear the fan a little but it wasn't anywhere near locked up.

    It's been 2/3 blocked since july sometime and normal water temp is 187F.

    Water temp of 220 should have that fan sounding like a roaring lion even at low engine speeds. If it's not, clutch is likely bad or underfilled. It's directly controlled by a mechanical temperature spring in the center of the clutch that responds to air temp coming out of the radiator; it controls where the silicone fluid in the clutch is diverted to.
     
  18. Oct 8, 2012 at 7:27 PM
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    2010TRD

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    Ive yet to hear a "roar" from my fan.....

    Its spinning,,,,:confused:
     
  19. Oct 8, 2012 at 7:39 PM
    #19
    Blygy

    Blygy Well-Known Member

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    It may be spinning but unless you have a photo tach to check the rpm of the fan it may not be spinning up to full speed.. Most vehicles will fail the fan clutch into the engaged position but I have very little experience with the Tacoma as of yet.. I have only had mine for about 3 months.
     
  20. Oct 8, 2012 at 7:42 PM
    #20
    2010TRD

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    One dealership (tech is a TW member) said they tested the fan .... and its working as should
     
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