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overheating troubleshooting tips

Discussion in '1st Gen. Tacomas' started by Clover, Jul 27, 2012.

  1. Jul 27, 2012 at 4:51 PM
    #1
    Clover

    Clover [OP] Member

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    I have a 95 with a 2.4L 4wd that overheated the other day...blew the upper radiator hose. swapped the hose out and got her running again, but i am still getting a higher temp reading than it used to read. this was just at an idle for 5-10 mins. I shut her down before she got too hot. the top hose is hot, bottom hose is cool as can be. if i squeeze the lower hose i can hear water moving around inside. I assume that means that it's the radiator, but i am not certain. My next step is to flush it out, or replace it. any helpful advice on a diagnosis, cheap parts or possible causes? Thanks in advance.
    Clover
    Hammond, LA
     
  2. Jul 27, 2012 at 5:15 PM
    #2
    98tacoma27

    98tacoma27 :POOPCORN: Thor

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    Have you checked the oil by chance? How many miles?
     
  3. Jul 27, 2012 at 5:16 PM
    #3
    lotsoftoys

    lotsoftoys pavement is boring....

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    bunch of crap
    sounds kinda like the thermostat isnt opening?
     
  4. Jul 27, 2012 at 5:32 PM
    #4
    Smokey11

    Smokey11 You Can't Fix Stupid !

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    ^ This would be my guess.
     
  5. Jul 28, 2012 at 1:51 PM
    #5
    Clover

    Clover [OP] Member

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    oil level is good, it leaks a little from the rear main so i have to moniter it regularly
    just changed out the thermostat and it still gets hot. i am thinking radiator, water pump, and fan clutch are in need of a replacement, also a compression test is in order. thanks for the quick responses, very much appreciated
     
  6. Jul 28, 2012 at 1:54 PM
    #6
    98tacoma27

    98tacoma27 :POOPCORN: Thor

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    Does your heater blow hot air when it's up to temp?
     
  7. Jul 28, 2012 at 2:12 PM
    #7
    Clover

    Clover [OP] Member

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    no hot air from heater 203000 miles
     
  8. Jul 28, 2012 at 2:14 PM
    #8
    Clover

    Clover [OP] Member

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    i thought that the fact that no hot air coming out at norm idle temp was a bit odd. what is that due to?
     
  9. Jul 28, 2012 at 3:00 PM
    #9
    98tacoma27

    98tacoma27 :POOPCORN: Thor

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    The heating valve isn't opening or the fluid is not circulating
     
  10. Jul 28, 2012 at 8:11 PM
    #10
    Ga tacoguy

    Ga tacoguy Well-Known Member

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    :) I hate to tell you, but you have a 17 year old Taco and the radiator is clogged shut. You are not exchanging heat in the air fins that make up the radiator. They are clogged up and not letting water/coolant flow through them. The water may move from top to bottom, but no heat is being exchanged from the coolant/ water. I would replace the radiator first and see if it over heats again.
    You could also be having a failing water pump, if it over heats at idle with a new radiator installed. This should cure your problem.Good Luck.
     
  11. Jul 31, 2012 at 5:17 PM
    #11
    hossmaster

    hossmaster Well-Known Member

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    this sounds like it and you may have a big air bubble in the system. When you refilled the coolant did you run the engine and run new coolant through the block? You can do this by leaving the top rad hose off the radiator side and when the thermostat opens it will run water out the top hose and into a bucket. It flushes the system, gets all the bubbles out, and verify that the thermo is opening.
     
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