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What is normal engine temp?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Bowtied, Aug 6, 2001.

  1. Bowtied

    Bowtied Registered Member

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    I need to know what is normal for engine temp.
    Here's what I got:
    87 / TBI / 350ci crate / 350 auto

    When running around town and on the highway with the A/C off it is right around 200 F.

    When running around town or on the highway with the A/C on it gets above 200, normally no higher than 235?

    Is this way too hot? If so, what measures should I take to cool it down?

    Thanks!
    Andy
    (Bowtied)
    By the way, it's been above 90 here for the past few days if that factors in.
     
  2. rampage

    rampage 1/2 ton status

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    I think NOT is about 180 degrees.
     
  3. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    Do a rad flush and replace the thermostat with a 195 degree stat and then check it out. After that, replace the water pump. Weirdest thing I ever saw was I had a water pump go out, drove about 1000 miles on it, but the temp wouldn't go above 200 with the heater blasting.

    Bubba Ray Boudreaux,
    Leader of the Advance Party for
    the CSA revolution in the PRK!
    <a target="_blank" href=http://community.webshots.com/user/mdntrdr1>http://community.webshots.com/user/mdntrdr1</a>
     
  4. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    It is higher than a stock blazer but the crate motor is probably higher performance package.

    The 235 may be getting close to abnormal. Clean the system inside and out and run 70/30 distilled water and coolant with a bottle of Water Wetter from Redline.

    Other things such as timing can affect temp also.

    Dave

    Saw It... Wanted It... Had A Fit... Got It
    91 K5 - in the process of 4" lift with D60/14FF plus LOTS of extras. ETF August 1.
     
  5. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

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    I know that most people know this, but I am going to state the obvious anyway(I've seen too many people do this thinking it would help cooling). You must have a thermostat installed. If not the coolant will move through the system so quickly that it won't transfer the heat. The correct temp. t-stat for your truck is 195 degrees.(unless you are running an aftermarket chip) Your fuel injection system won't go into closed loop mode until it gets up to temperature. In this case your fuel mileage will suffer and your emissions will be elevated. If you have the correct(and functional) t-stat installed, then I agree with the post above. Flush the system with a good radiator flush chemical, and refill the system 40/60 mix of water and coolant. Water wetter never hurts either, but you shouldn't have to have it. Good luck!

    '85 K5 : Run it til it breaks, then fix it and go again!
     
  6. muddin4fun

    muddin4fun 3/4 ton status

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    240 is concidered over heating so your's is running too hot to me.
    I'm running a high performance motor and she stays right at 190 whether idleing, down the highway, stop and go traffic....all in 100+ degree weather.
    A lot of what these other guys have mentioned are worth checking out. Also, check and make sure you don't have a lot of bugs on the radiator. Then, flush it real good and put in a new thermostat (they're cheap so there's no reason not to) and see what that does. Be sure to mix the antifreeze with water ...50% is the best for me and I'm in hot temps too. Good luck!

    I've got a mind like a . . . a . . . what's that thing called?

    <a target="_blank" href=http://www.geocities.com/muddin4fun79blazer/>http://www.geocities.com/muddin4fun79blazer/</a>
     
  7. muddin4fun

    muddin4fun 3/4 ton status

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    Oh, 190 to 212 is about normal temp. It shouldn't fluctuate a bunch.

    I've got a mind like a . . . a . . . what's that thing called?

    <a target="_blank" href=http://www.geocities.com/muddin4fun79blazer/>http://www.geocities.com/muddin4fun79blazer/</a>
     
  8. WakeBoard&4X4er

    WakeBoard&4X4er 1/2 ton status

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    do a flush, change the cap, and the t-stat. you might want to have a pressure check. if you are loosing pressure you will not have correct cooling
     
  9. shupach

    shupach 1/2 ton status

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    my 98 burban with a 454 never gets above 210, so i figure around there is normal.

    phill
     
  10. Itali83

    Itali83 1/2 ton status

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    I have to differ with the no thermostat = overheating. when I bought my truck, it had no thermostat in it because of a long story. Well, anyways, the truck never got hotter than 100 degrees. So that is just a myth about the no thermostat = overheating. At least for my truck. Just lettin ya know.
    Ben 87 Jimmy
    <font color=blue>Rust=Bad</font color=blue>
     
  11. HispanicPanic

    HispanicPanic 1/2 ton status

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    my jimmy is always running 160 even in 100 degree weather so anything over 200 for me is over heating

    BEER-- one is none, two is half, and three is one.
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  12. Blazer1970

    Blazer1970 1/2 ton status

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    I agree with Itali, my Blazer didn't have a thermostat when I got it either, and it would not run above 100 - 120 degrees. Believe me, I know, because I froze my ass off driving it home to Michigan from southern Tennessee. The first thing to check is if your temp gauge is accurate. Factory temp gauges are junk when they are working right, the accuracy is terrible. The way I check mine is to drive until it is reading a hot temperature then stop and release the pressure in the cooling system, remove the cap, and check the temp with another thermometer (I used the meat thermometer from the kitchen). If anyone does this, be very careful removing the cap. Use some rags to surround it completely - HOT ANTIFREEZE will spray out.

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison
     
  13. newyorkin

    newyorkin 1 ton status

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    I think I run at about 170-185 normally. I pulled my radiator, pathced a pinhole leak, and scrubbed out the fins real good too. Before cleaning out the fins, it would run about 200, and
    move up to 235 in stop and go traffic.
    Your temps sound real high, like what I was getting before the cleaning, but I second the reply about getting an accurate temp reading...

    Wife's car (Pontiac 2.8) runs at 220 normally, though.

    Ratch
    <a target="_blank" href=http://k5.8m.com>k5.8m.com</a>
    **I need a house. Friggin realtor went and sold mine.**
     
  14. TwoCrowsDesign

    TwoCrowsDesign 1/2 ton status

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    89 350 tbi stock before new radiator w/ 195 thermostat ~210F

    With new radiator &amp; 185 thermostat ~185F Imagine that!



    John
     
  15. dyeager535

    dyeager535 1 ton status Premium Member

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    Well, this article begs to differ with you : ) http://www.dorianyeager.com/index2.html
    No anti-theft measures on your truck? No pity when its stolen
     

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