Coolant temperature on a 94 454 [Expired Topic]

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by AndyD, Jul 14, 2006.

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  1. AndyD

    AndyD Member

    Hi everybody.
    I just bought a 94 2500 4x4 with a 454. Although it looks like new and the previous owner had it maintained at the dealership, I noticed the coolant fluid was really dirty. So I flushed and rinsed the system 5 times with water and coolant flush. Unfortunately it still running a bit hot, the gauge goes up to the last mark before the 210 mark in normal driving conditions without towing. Is this maybe normal or should I check out the radiator itself?
  2. ChevyFan

    ChevyFan The Sheriff Staff Member 5+ Years 1000 Posts

    Hi Andy, I spent the years between 1980 and 1987 in Spokane!

    Anyhow, how many miles on that 94?
  3. AndyD

    AndyD Member

    Hi, it has 157000 on it.
    What a small world! Originally I'm from Germany and moved to the US in 2000.
  4. 84fiero123

    84fiero123 Epic Member 5+ Years 1000 Posts Platinum Contributor

    Does the coolant still look brown?

    If so you may have a bad head gasket or intake gasket.

    If not then a clogged radiator is possible, or not.

    Have you tried changing the thermostat yet?
    It may be sticking.
  5. Pete

    Pete New Member

    Coolant Temperature in Your '94

    Andy-----I too am a new owner to a used Suburban only it is a '95 2500 4x4 with a high mileage 454 engine. Unless someone corrects me, I believe your temp is normal at 209 degrees. Mine runs exactly the same as does my friend's '95 of same configuration. It is even more normal when you consider the "red" area of the temp gauge is at 260 degrees. Does anyone have the factory specs applicable to this issue?????

  6. jack77

    jack77 Member

    210 is just fine. most new cars dont kick on the electric fans until 225-230 degrees. the thermostat on your burb should open at 195 degrees and getting up to 220- 230 degrees would be acceptable on hot days or when towing up hill.
  7. AndyD

    AndyD Member

    well.. in the end I had to replace the radiator. It was shooting fluid all the way to the least it never overheated.
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