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Coolant system problem?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Toy4Life, Nov 2, 2007.

  1. Nov 2, 2007 at 3:36 PM
    #1
    Toy4Life

    Toy4Life [OP] 668: The Neighbor of the Beast

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    Here's the story:

    Some how my radiator cap came loose on my way home from work yesterday afternoon. I started smelling coolant just before my driveway. It didn't appear to have lost too much and wasn't hot, but still struck me as odd.

    So on my way to work this morning, with outside temp being around 35 degrees, I noticed how quickly my truck warmed up (red flag #1). About 10 miles down the road the engine temp started to climb (red flag #2). A few seconds later the temp dropped back down to normal...? After a couple of these rise and drops in temp, I pulled over popped the hood....coolant low. I expected that. What I can't figure out is the fluctuation in the temp. My heater was working and the temp never made to the red even after I turned around went back home and switched vehicles.

    I'm thinking thermostat, but I want some other input.

    Sorry for the long winded explanation and thanks in advance for your help.
     
  2. Nov 2, 2007 at 3:52 PM
    #2
    SLOTaco

    SLOTaco Ultimate Member

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    Maybe air pockets in the cooling system? But its still odd. Not sure?
     
  3. Nov 2, 2007 at 4:16 PM
    #3
    Toy4Life

    Toy4Life [OP] 668: The Neighbor of the Beast

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    I read about "burping" the system when I did a search. How is this done?
     
  4. Nov 2, 2007 at 5:54 PM
    #4
    350TacoZilla

    350TacoZilla Well-Known Member

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    I would say the same it sounds like air pockets... I bought a Prestone flush and fill kit and just replaced coolant too (needed it)
     
  5. Nov 2, 2007 at 6:16 PM
    #5
    Toy4Life

    Toy4Life [OP] 668: The Neighbor of the Beast

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    The air pockets would make sense. About a month ago I got into some real deep mud soup while offroading......to make a long story short, my radiator clogged with mud(the fins) and a bunch of drunken rednecks were screwing with the radiator trying to assess the problem.
     
  6. Nov 3, 2007 at 9:51 AM
    #6
    350TacoZilla

    350TacoZilla Well-Known Member

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  7. Nov 3, 2007 at 10:31 AM
    #7
    Janster

    Janster Old & Forgetful

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    Since you mentioned that your cap was loose....

    I'd start off by getting a new radiator cap and top off the radiator and overflow tank and see what happens.

    The radiator cap is more than just a cap - it helps keep the system pressurized which allows the water to heat up at higher temps before boiling.

    Check this out
    http://www.musclecarclub.com/library/tech/cooling.shtml
     
  8. Nov 3, 2007 at 12:48 PM
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    Toy4Life

    Toy4Life [OP] 668: The Neighbor of the Beast

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    Thanks for that link, Janster. Very informative. I might have to give a new cap a try.
     
  9. Nov 4, 2007 at 12:23 PM
    #9
    Toy4Life

    Toy4Life [OP] 668: The Neighbor of the Beast

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    Update: I replaced the radiator cap and brought the coolant level back up to where it should be. Problem is, now my heat isn't working. Just blowing cold air.
     
  10. Nov 4, 2007 at 12:27 PM
    #10
    Toy4Life

    Toy4Life [OP] 668: The Neighbor of the Beast

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    alright, finally got heat, but it sure took a long time.
     
  11. Nov 12, 2007 at 2:37 PM
    #11
    03coma

    03coma Well-Known Member

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    sounds like a thermostat problem, but yea on Toyota's you have to burp the system. Sometimes if you change the fluid and don't burp it you will get a red indicator light come on the dashboard.
    What I do to burp the system is fill it up and let it run, sometimes it takes a while, then just top it off.
     
  12. Nov 12, 2007 at 2:42 PM
    #12
    Toy4Life

    Toy4Life [OP] 668: The Neighbor of the Beast

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    It's all back to normal now. In hindsight, I think the thermostat was just sticking, and now it isn't. If I have a problem again, I'll just go straight for the thermostat. Thanks for the tip, though.
     
  13. Nov 13, 2007 at 6:25 AM
    #13
    2003greenbean

    2003greenbean Carolina Alliance Costal Div

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    thats what it sound like to me the thermostat is sticking you need to get it fixed the heAT WONT WORK STUCK OPEN OR IT Will over heat stuck closed i think
     
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