Engine cooling problem

Discussion in 'Engine & Drivetrain' started by Maximus1, Aug 21, 2019.

  1. Maximus1

    Maximus1 Full Access Member

    Posts:
    238
    Likes Received:
    105
    Joined:
    Mar 6, 2017
    Name:
    Tom
    My 04 LT 5.3L starts to overheat when it sits at idle with the A/C on. The only thing I’ve done so far is I installed a dual electric fans that pull a lot more air than the stock manual fan but even with this it still climbs in temperature. The only thing that I have changed to the cooling system is the fans. I have changed the thermostat to a lower temperature thermostat but it will still climb in temperature. Any other ideas? Could my radiator be clogged up? If so how can I unclog it? Granted it is hot outside, today it was 103 but even so I see other cars next to mine running and not over heating. I’ve really gotta try and correct this problem quickly because I have a medical condition that I’m not supposed to be in the heat or I could have a seizure. It starts over heating while I’m waiting on my son and daughter to get out of school. Any idea will be greatly appreciated and there’s no dumb idea I just really need this fixed and I’m at a loss.
     
  2. SnowDrifter

    SnowDrifter Full Access Member

    Posts:
    1,653
    Likes Received:
    1,105
    Joined:
    Sep 5, 2016
    Location:
    Washington. The desert side not the Starbucks side
    Name:
    Chris
    Check coolant level, coolant condition, verify thermostat opens all the way, check radiator for debris, measure temperature on the radiator inlet and outlet. Also check that your belt is in good condition, and tensioner is good.
     
  3. swathdiver

    swathdiver Full Access Member

    Posts:
    8,241
    Likes Received:
    6,747
    Joined:
    May 18, 2017
    Location:
    Treasure Coast, Florida
    Name:
    James
    What kind of fans Tom and have you verified that both are running? It might be time for a new radiator and water pump. Still running Dexcool or the green stuff?
     
  4. Doubeleive

    Doubeleive Supporting Member

    Posts:
    7,030
    Likes Received:
    5,535
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    I would replace the radiator if it is 5yrs old or more and has not been flushed annually, while you are in there also clean the space between the radiator & a/c condenser and the front of the condenser, put the regular temp thermostat back in. I would NOT buy the cheapest radiator around the ultra cheap ones will just make more problems, your best bet is to get one from a stand alone radiator shop rather than the auto parts store if possible. the problem you are reporting sounds to me like a typical clogged radiator issue, you could try cleaning it with citric acid cleaners but it may not do much good at this point.
     

Share This Page