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Is it ok to leave our engines running at idle for hours at a time?

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Old 02-19-2012, 06:47 PM
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Originally Posted by '08f150stx
My oversight, but I left a 4 cyl. run 8 hours. Maybe it was just coincidental but more moisture in the crankcase and burned oil afterward. Coolant temperature and circulation would concern me most.
Was going to post this but...
Old 02-19-2012, 07:28 PM
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I used to be a meter reader for DTE. My jeep would run for 4-8 hours 6 days a week. A few months in I shattered the #6 piston on my 4.0. I did a full rebuild. I bought a stroker kit and did some work to the head and block. I continued meter reading for about a year driving the jeep everyday. Then I got a new job. Anyway long story short the motor broke the cam earlier this month, the shop claims lack of oil.
Old 02-20-2012, 12:02 AM
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I wouldnt do that at all, what I would do is go get a optima battery, and go to somewhere like walmart and get one of those fan/heater combo for your cig lighter and use that and the optima battery shouldnt go dead plus it will save you gas and life of your truck. just my two cents...
Old 02-20-2012, 07:53 AM
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Or you can leave the wndows open. I use to cut to size some of the mosquito mesh an put in the windows.... Way many bugs in florida.
Old 02-20-2012, 08:00 AM
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I think it should be cold enough for to open the windows at least down here in Houma it will be. Good luck and have fun.
LAISSEZ LA BON TEMPS ROULET!!!!
Old 02-25-2012, 02:48 PM
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no engine does well with extended idle, even the diesels. on the diesels most guys that do idle for extended periods will idle up and or idle against a load i.e. exhaust brake, trans, something.

gas engines are the same, you need to either high idle circa 1000 rpm, and you should load the engine up somehow. loading against the trans will be hard on the trans so thats a bad idea.

i never do extended idles without a way of loading or maintaining high idle. when in a situation such as yours, i either crack the windows or have good blankets depending on the situation, then before shutting down i run the hvac at either extreme of the temp untill the cab is at or near that temp, then shut down and sleep or do whatever. typically the cab will stay comfortable for several hours, at which time i will repeat the process if needed
Old 02-25-2012, 11:41 PM
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Well it turned out that it was a a cool night so I just cracked a few windows and went to sleep for a few hours. Didn't need the engine running at all.
Old 02-26-2012, 01:26 AM
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For my current detail at my job, I idle for about an hour, twice a day everyday. Is that bad? I will be off the detail at the end of this month.
Old 02-26-2012, 02:12 AM
  #19  
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I let my company f150s do it all the time. Leave the AC running in the hot summer when I'm out on projects. Haven't ever had any negative affects from it, but that certainly doesn't mean it's okay for them.
Old 02-26-2012, 08:09 AM
  #20  
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I forgot to mention that when I let my f350 idle, it was a high idle. Have a toggle switch under the dash to make it idle around 1000 rpm, because the other poster is right. Long idles are bad for every engine, not just gasoline engines.



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