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  1. #1
    Jr. Apprentice
    Join Date
    Aug 2009
    Location
    houston, tx
    Posts
    28

    Default is 210 a normal idle temp on 07-09 silverados?

    isn't that boiling?? mine reaches 210 once warmed up. is that normal?? my 98 chevy is more like 150.

  2. #2
    Legend unplugged's Avatar
    Join Date
    Sep 2006
    Location
    High Deserts of SoCal
    Posts
    2,554

    Default

    Antifreeze and a pressurized cooling system raises the boiling point of water.
    Here is a chart of the boiling point for anti-freeze/water mixes.
    Add a pressure cap on the radiator and with a 70/30 antifreeze mix the boiling point rises closer to 270.

    210 is not a problem. If you want a lower idle temp you could try a 160 or 180 deg tstat.
    Be advised that emission equipment is designed to operate at higher temps so a lower temp tstat may cause other symptoms.

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  3. #3
    Jr. Engineer
    Join Date
    Aug 2009
    Location
    Muddy Creek, Va & Hunting Quarters NC
    Posts
    225

    Default

    210 is the normal operating temp.

  4. #4

    Default

    Yeah i think thats normal for the new trucks. Both my buddies denali and silverado are right at 210 when i drive them about, and there both 07+ so i'd say its normal. And my silverado stays around 180-190 usually.
    2000 Chevy Silverado 1500 5.3L Z71 - 4x4


  5. #5

    Default

    this is a slight change in subject but how hot is too hot for the transmission?
    09 Silverado 5.3 LT Crewcab Z71, Rhino Line, Rough Country leveling kit
    87 samurai........:jap: haha

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