99 Tahoe running cold???

Discussion in 'Tow Rigs and Trailers' started by BigClay, Jun 7, 2009.

  1. BigClay

    BigClay Well-Known Member

    Joined:
    Sep 24, 2008
    Location:
    Winston-Salem
    My 99 Tahoe is my DD. I drove it back and forth to Winston today (~60 mile round trip), and the temp guage was sitting around 175, and it normally sits around 210. I had the A/C blasting and was driving around 65mph. Is my t-stat gone? What could cause it to do this?
     
  2. adam greene

    adam greene Well-Known Member

    Joined:
    Sep 9, 2008
    Location:
    morganton
    my buddys sub did the same think probley low on coolant
     
  3. Jakemd98

    Jakemd98 Well-Known Member

    Joined:
    Jan 14, 2008
    Location:
    Wilmington
    certain thermostats are designed to run wide open in the case that they fail, it sounds to me that this may be your issue.
     
  4. rattlecanpaint

    rattlecanpaint Well-Known Member

    Joined:
    Apr 18, 2005
    Location:
    Winston Salem
    Also a great time to trash the dexcool shit that's in your cooling system and go to regular green coolant. (provided it's still in there.)
     
  5. hondamnit

    hondamnit Active Member

    Joined:
    Dec 4, 2008
    Location:
    hendersonville/asheville
    its very important to not drive the truck around with it running so cool. oil temp is related to coolant temp. the oil will only protect the way its intended to at the normal operating temp. i would get it fixed asap. its prob the t-stat.
     
  6. BigClay

    BigClay Well-Known Member

    Joined:
    Sep 24, 2008
    Location:
    Winston-Salem
    thanks guys, I will check the coolant level tonight when I get home, and if it is not low, then looks like a t-stat change is in the immediate future.

    hondamnit - I did notice the oil pressure was a little higher than normal, nothing bad, just a touch higher...
     
  7. Rich

    Rich Asshole at large

    Joined:
    Mar 17, 2005
    Location:
    Central PA
    I hear SO many people trashing dex-cool.. why?
     
  8. snappy

    snappy YHDG's adopted son!!! Moderator

    Joined:
    Jun 19, 2007
    Location:
    high point
    Turns into basicaly battery acid, ok maybe not that bad but gets pretty acidic(sp), and eats everything up.
     
  9. pheery

    pheery Well-Known Member

    Joined:
    Mar 21, 2005
    Location:
    High Point
    it eats gaskets, usually intake gaskets
     
  10. foreman1063

    foreman1063 Well-Known Member

    Joined:
    Jul 11, 2005
    Location:
    Henderson
    Slap a Cherokee badge on that thing, That'll fix the underheating problem.:flipoff2:
     
  11. BigClay

    BigClay Well-Known Member

    Joined:
    Sep 24, 2008
    Location:
    Winston-Salem
    LOL, I also have a ZJ, so maybe the two can equal one normal temp rig! :lol:
     
  12. Caver Dave

    Caver Dave Just holdin' it down here in BFV Moderator

    Joined:
    Mar 10, 2005
    Location:
    Hooterville (24171)
    And when mixed with regular AF (by some service "professional" or spouse, turns into a crystaline/jelly mix that takes extensive (read: hours of) flushing to get out of the block/rad... though CLR seems to break it down well if mixed in high enough concentrations
     
  13. BigClay

    BigClay Well-Known Member

    Joined:
    Sep 24, 2008
    Location:
    Winston-Salem
    How difficult will replacing the t-stat be; I have never done one before? The Tahoe is my DD, so on average how long will it take. I don't seem to mind working on my jeep because if it takes longer than I thought, I can still get to work in the morning...
     
  14. pheery

    pheery Well-Known Member

    Joined:
    Mar 21, 2005
    Location:
    High Point
    20 minutes
     

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