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Overheating at idle

Discussion in '1st Gen Tundras (2000-2006)' started by The tundy, Sep 10, 2018.

  1. Sep 10, 2018 at 5:19 PM
    #1
    The tundy

    The tundy [OP] New Member

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    Hey guys I’m having a small issue with my 01 tundra with the 4.7 where at idle it starts running a little hot while sitting in traffic for a while. I have replaced the fan clutch, radiator, radiator cap, and thermostat all within the last 17k miles and it’s all been within the past couple months. Also when it does start running hot the ac stops blowing cold. As soon as I get going again the ac is freezing again and the truck runs like a top. This problem only occurs when I have the ac blowing it seems. I have some mechanical ability but this one really has me stumped. Thank you for any help.
     
  2. Sep 10, 2018 at 5:34 PM
    #2
    ColoradoTJ

    ColoradoTJ #WAISTBAND Staff Member

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    I would be looking at the water pump. Your not getting good circulation.
     
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  3. Sep 10, 2018 at 5:35 PM
    #3
    TheBeast

    TheBeast Dirtbag

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    no leaks in any of the hoses ?
     
  4. Sep 10, 2018 at 5:42 PM
    #4
    The tundy

    The tundy [OP] New Member

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    If it was the water pump wouldn’t it be overheating all the time? The hoses are all firm while it’s running showing there is pressure.
     
  5. Sep 10, 2018 at 5:42 PM
    #5
    The tundy

    The tundy [OP] New Member

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    I have not noticed any leaks. coolant level seems to stay the same.
     
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  6. Sep 10, 2018 at 6:36 PM
    #6
    TheBeast

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    air bubble ? when was the last time you flushed it ?
     
  7. Sep 10, 2018 at 6:51 PM
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    ColoradoTJ

    ColoradoTJ #WAISTBAND Staff Member

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    No, not necessarily. When your moving you have good airflow and additional RPM from the motor which propels the pump.
     
  8. Sep 10, 2018 at 6:54 PM
    #8
    The tundy

    The tundy [OP] New Member

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    Last time I replaced the radiator a little over 4 months ago
     
  9. Sep 10, 2018 at 6:55 PM
    #9
    The tundy

    The tundy [OP] New Member

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    Alright thanks for the tip I’m thinking that’s going to be next on my list whether it’s bad or not because I need to do the timing belt service too.
     
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  10. Sep 10, 2018 at 7:05 PM
    #10
    ColoradoTJ

    ColoradoTJ #WAISTBAND Staff Member

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    Tag me when you reply. I’m really interested in the outcome. You have replaced everything but the pump.

    I have seen clutch fans bad out of the box...happened to me. Did you get a new one from Toyota or get a parts store replacement?
     
  11. Sep 10, 2018 at 7:13 PM
    #11
    The tundy

    The tundy [OP] New Member

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    I got it from autozone back in November I believe it was 17,000 miles ago I replaced it and it’s seemed to work fine. That is definitely something I will check though.
     

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