idle engine engine hot please help
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HT4100 4.1, 4.5, 4.9 Discussion, idle engine engine hot please help in Cadillac Engine Technical Discussion; Ok bought a 95 deville with 4.9 this summer stupid me didnt check and the guy had ran water this ...
  1. #1
    poduff1978 is offline Cadillac Owners Member
    Automobile(s): 95 deville 4.9
    Join Date
    Dec 2010
    Age
    36
    Posts
    5

    idle engine engine hot please help

    Ok bought a 95 deville with 4.9 this summer stupid me didnt check and the guy had ran water this summer so the coldest day i found out i put it in my heated garage let it thaw drained filled no leaks expect in rad had to replace rad rad cap and t-stat fired up runs fines then came up with idle engine engine hot both fans came on shut off topped off started back up not leaking still same thing so i went and pulled codes and got ac High Side Temperature Sensor Circuit current Coolant Temperature Too High and Keep alive memory error any help would be greatly appriciated and was wondeing i have digital dash how do i get engine temp in degrees

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  3. #2
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
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    Jacksonville, FL
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    Re: idle engine engine hot please help

    To get your temps in Imperial measurements, look for the US/Metric button on the A/C controller.

    If your having to add water to the cooling system an your not seeing leaks, well, that's not good. Make sure the cooling system is completely full (no air in system) because if you have an air pocket in the system it will do what you are describing.

  4. #3
    poduff1978 is offline Cadillac Owners Member
    Automobile(s): 95 deville 4.9
    Join Date
    Dec 2010
    Age
    36
    Posts
    5

    Re: idle engine engine hot please help

    how do u get air pocket out ifs that what i have and my temp does not show up at all on my dash

  5. #4
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
    Join Date
    Feb 2009
    Location
    Jacksonville, FL
    Posts
    1,013

    Re: idle engine engine hot please help

    Usually when I replace my t-stats, I drill a 1/8" hole in it to allow air to pass through without reducing the operation of the thermostat itself. Otherwise, you have to let the system "burp" itself.

    If you want to see your temps, go to your DIC and push the "Eng Data" button 2x's. The first one tells you the rpm's, the second tells you the temperature. The last button says "Engl/Metric", push it for Imperial units as apposed to Metric.

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