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What is Normal Operating Temperature?

Discussion in '4 Cylinder' started by Terrier, Nov 15, 2009.

  1. Nov 15, 2009 at 6:43 PM
    #1
    Terrier

    Terrier [OP] Well-Known Member

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    I was reading another thread on oil sludge and a question came to mind regarding short trips and normal operating temperature. I was wondering if anyone knows what normal operating temperature is and how long or how many miles it takes to get there. I imagine that it would vary; but is there an average?
     
  2. Nov 15, 2009 at 6:46 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Normal operating temp is around 195* to 210 or so....I cant remember off hand. As for the time to warm up, it depends on the ambient temp.
     
  3. Nov 15, 2009 at 6:46 PM
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    ImpulseRed008

    ImpulseRed008 Gone But Not Forgotten

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    When it's warm out and/or running for awhile 190* per my scan gauge. Doesn't take long to get to operating temp.
     
  4. Nov 15, 2009 at 6:51 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Thanks Susan...I couldnt remember exactly.

    Thermostat opens between 176* and 183* and is fully open at 203*
     
  5. Nov 15, 2009 at 7:01 PM
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    Terrier

    Terrier [OP] Well-Known Member

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    Thanks for your responses. Speaking of scanguage, is the normal oprating temp on it consistnet with the temparature guage on the vehicle? In other words, when my temp guage gets to its normal position, does that mean that I have reached about 190?
     
  6. Nov 15, 2009 at 7:07 PM
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    ImpulseRed008

    ImpulseRed008 Gone But Not Forgotten

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    Yes, when the scangage reads 190 - 192* the temp needle is in the middle, normal operating position.
     
  7. Nov 15, 2009 at 7:09 PM
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    ImpulseRed008

    ImpulseRed008 Gone But Not Forgotten

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    If I remember rightly... the highest temp I've ever seen on the scangage is 193* and that was running across western TX where the speed limit is 80 mph :D
     
  8. Nov 16, 2009 at 7:47 PM
    #8
    def4pos8

    def4pos8 Well-Known Member

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    Water temperature is only loosely related to the OIL temperature.

    The coolant will warm quickly, helping to control combustion characteristics (and keeping your tootsies warm).

    Oil temperature tends to lag coolant temperature. During extreme cold operation, oil temperature might not rise beyond 140 degF, even over moderately long trips of up to fifty miles.

    Normal OIL temperature is in the 190- to 220 degF range. The oil needs to reach those temperatures to boil combustion bypass water out of the crankcase. That's why sludge problems are more frequent during cold weather.

    The water problem can become sufficiently severe to ice up and disable crankcase ventilators. The resulting crankcase pressure my prevent the engine from turning over at start-up.

    The solution is preventative: be sure to make as many long trips as possible during cold weather and avoid frequent, short trips.
     
  9. Nov 16, 2009 at 7:56 PM
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    Terrier

    Terrier [OP] Well-Known Member

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    Thanks def4pos8, I didn't look at it from that standpoint. I only live about 2 miles from work. This morning was about 15 degrees. It was about 32 degrees when I got home. I guess I'll have to try make up for it on the weekends and maybe at lunch time.

    Also, thanks ImpulseRed008 for your response.
     
  10. Nov 16, 2009 at 7:57 PM
    #10
    Terrier

    Terrier [OP] Well-Known Member

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    By the way, does scanguage read oil temp?
     
  11. Nov 16, 2009 at 8:03 PM
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    supralight

    supralight Well-Known Member

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    No oil temp on scangauge. My truck reads about 185-187 in this season.
     
  12. Nov 16, 2009 at 9:40 PM
    #12
    def4pos8

    def4pos8 Well-Known Member

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    You're welcome.

    Cold weather operations are weird. The crankcase vent ice-up/no start thing is more than theory. It happened to my sister's Buick back in '06 in the, relatively, "mild" winter at Milwaukee, Wisconsin. --too many short trips. . . .

    I learned cold weather ops at such "garden spots" such as Duluth, Minnesota and Minot, North Dakota (Lower ManiSkatchiwan, eh! :canada:) while serving in the Air Force during The Bad Old Days.

    My son was born at Minot and resides today at Grand Forks. He is known here as "sweater 914" and did the oil pan heater sticky. Oil pan heaters help with this crap, since they warm the oil to about 40 or 50degF when the outside air temp is down around -20 or -40 degF.

    We are aviators. He's an airline captain now but we both fly light aircraft. If you think trucks are "fun" in the cold, imagine what it's like to try to coax an air/oil-cooled engine to life at -20 degF!! :eek:

    Welcome to a wider world!! :cheers:
     
  13. Nov 17, 2009 at 2:31 AM
    #13
    chad68

    chad68 Master Jedi Member I am...

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    I added a digital autometer water temp. and the highest I have ever seen was around 200F.

    It's hooked up to the ingoing hose to the heater core.
     
  14. Nov 17, 2009 at 5:21 AM
    #14
    xsvtoyz

    xsvtoyz Well-Known Member

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    well according to my scangauge water temps average 179 to 185 for me. Seems to get the 185 when it cooler out which I know sounds odd but I think it has to do with the thermal coupling on the fan.
     
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