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Thread: If engine is left idle too long = damage?

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  1. #1

    If engine is left idle too long = damage?

    I heard once that once you start your car it is nice to let it sit for a few minutes so the engine warms up, and the oil gets going, etc.; but that if you left it idle like that for 30 mins or more it would damage the engine....

    Myth or Wisdom?


  2. #2
    ipaintu
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    bs A motor should be able to run alday everyday as long as oil life and coolants are ok..

  3. #3
    You are here entirely tooo much!! seth98esT's Avatar
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    Re: If engine is left idle too long = damage?

    Quote Originally Posted by galantebeige
    I heard once that once you start your car it is nice to let it sit for a few minutes so the engine warms up, and the oil gets going, etc.; but that if you left it idle like that for 30 mins or more it would damage the engine....

    Myth or Wisdom?

    Retardation? Only thing your not getting that you get when you drive is airflow. But once your motor warms up and gets to 200-210 degrees, the fans kick on and cool it down a few 20 degrees. Like ipaintu said, as long as the motor has gas, oil, and coolant, you wont damage anything while idling.
    7g for life!

  4. #4
    I have let my car idle for 2+ hours. Haha long story...anyway it'll be fine.

  5. #5
    Retardation!!

    I tought it sounded weird. I could not understand why would it get damaged.

  6. #6
    with the gas prices of today, i don't know why you would let your car just idle there for a very long period of time.

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  7. #7
    Proto
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    <div class='quotetop'>QUOTE(pinoyesv6)</div><div class='quotemain'>with the gas prices of today, i don't know why you would let your car just idle there for a very long period of time.</div>

    its the new trend

  8. #8
    You are here entirely tooo much!! 4-G-rim's Avatar
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    What reasons would you leave your car idle for prolong periods of time anyways? Unless you locked your keys in the car while they are still in the ignition in still which case wouldn't damage the motor anyways.

    1991 Galant VR4 1948/2000_________1996 Galant "S" 5 speed 2.4L turbo

  9. #9
    Senior Moderator DOHCstunr's Avatar
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    prolonged idling is not good for the plugs cause they don't reach their optimal(self cleaning) operating temperature.
    you can also gum things up pretty bad.

    but nothing a few wide open throttle pulls won't fix.

    its bad for your plugs.
    and the environment
    and your wallet
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  10. #10
    TGC Regular Gladiator's Avatar
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    hmm I can think of one reason which involves doing something in the backseat at either very warm or cold outside temperatures

  11. #11
    Calipso
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    Quote Originally Posted by Gladiator
    hmm I can think of one reason which involves doing something in the backseat at either very warm or cold outside temperatures
    And BINGO was his name-o!

  12. #12
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    over heating is the problem.

    There is only so much your Fan can do. The heat will still trap under your hood. A fan can only blow so much air out of there.

    Compare to you driving on a highway, the wind rushes in are much cooling than your fan.

  13. #13
    Honestly, the biggest problem wont be the engine cooling but your transmission. I know alot of police cars have upgraded tranmission coolers with electronic fans due to guys sitting in them doing traffic and other things (not sleeping). I had a Ford Explorer at my last job and the transmission wasn't updated, we went through 3 trannys in 2 years due to overheating since my crew spent at least 6 hours a day on traffic enforcement.
    <img>

  14. #14
    TGC Regular Gladiator's Avatar
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    Quote Originally Posted by ChikagoGTZ
    Honestly, the biggest problem wont be the engine cooling but your transmission. I know alot of police cars have upgraded tranmission coolers with electronic fans due to guys sitting in them doing traffic and other things (not sleeping). I had a Ford Explorer at my last job and the transmission wasn't updated, we went through 3 trannys in 2 years due to overheating since my crew spent at least 6 hours a day on traffic enforcement.
    Thats if the car is in gear right?

  15. #15
    Quote Originally Posted by Gladiator
    Quote Originally Posted by ChikagoGTZ
    Honestly, the biggest problem wont be the engine cooling but your transmission. I know alot of police cars have upgraded tranmission coolers with electronic fans due to guys sitting in them doing traffic and other things (not sleeping). I had a Ford Explorer at my last job and the transmission wasn't updated, we went through 3 trannys in 2 years due to overheating since my crew spent at least 6 hours a day on traffic enforcement.
    Thats if the car is in gear right?
    No...as far as I know the tranny will still warm up when in park. At least that's what we were told ??
    <img>

  16. #16
    Quote Originally Posted by ChikagoGTZ
    Quote Originally Posted by Gladiator
    Quote Originally Posted by ChikagoGTZ
    Honestly, the biggest problem wont be the engine cooling but your transmission. I know alot of police cars have upgraded tranmission coolers with electronic fans due to guys sitting in them doing traffic and other things (not sleeping). I had a Ford Explorer at my last job and the transmission wasn't updated, we went through 3 trannys in 2 years due to overheating since my crew spent at least 6 hours a day on traffic enforcement.
    Thats if the car is in gear right?
    No...as far as I know the tranny will still warm up when in park. At least that's what we were told ??
    you also got to remeber that when u go on traffic enforcement you sit there. then you go out and chase someone and that heats up the oil then u go back to sitting so its harder to cool down that oil

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  17. #17
    Quote Originally Posted by pinoyesv6
    Quote Originally Posted by ChikagoGTZ
    Quote Originally Posted by Gladiator
    Quote Originally Posted by ChikagoGTZ
    Honestly, the biggest problem wont be the engine cooling but your transmission. I know alot of police cars have upgraded tranmission coolers with electronic fans due to guys sitting in them doing traffic and other things (not sleeping). I had a Ford Explorer at my last job and the transmission wasn't updated, we went through 3 trannys in 2 years due to overheating since my crew spent at least 6 hours a day on traffic enforcement.
    Thats if the car is in gear right?
    No...as far as I know the tranny will still warm up when in park. At least that's what we were told ??
    you also got to remeber that when u go on traffic enforcement you sit there. then you go out and chase someone and that heats up the oil then u go back to sitting so its harder to cool down that oil
    That's why you install one of these, most police interceptors have them:

    <img>

  18. #18
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    Quote Originally Posted by Gladiator
    hmm I can think of one reason which involves doing something in the backseat at either very warm or cold outside temperatures
    If that is the case then 2 hours my ass.

    lol.

  19. #19
    You are here entirely tooo much!! seth98esT's Avatar
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    Quote Originally Posted by ChikagoGTZ
    Quote Originally Posted by pinoyesv6
    Quote Originally Posted by ChikagoGTZ
    Quote Originally Posted by Gladiator
    Quote Originally Posted by ChikagoGTZ
    Honestly, the biggest problem wont be the engine cooling but your transmission. I know alot of police cars have upgraded tranmission coolers with electronic fans due to guys sitting in them doing traffic and other things (not sleeping). I had a Ford Explorer at my last job and the transmission wasn't updated, we went through 3 trannys in 2 years due to overheating since my crew spent at least 6 hours a day on traffic enforcement.
    Thats if the car is in gear right?
    No...as far as I know the tranny will still warm up when in park. At least that's what we were told ??
    you also got to remeber that when u go on traffic enforcement you sit there. then you go out and chase someone and that heats up the oil then u go back to sitting so its harder to cool down that oil
    That's why you install one of these, most police interceptors have them:

    Oooh I like that cooler, I need a new one

    [Edit]
    Ouch $209..
    7g for life!

  20. #20
    thanks guys for the info.
    it seems then, that being idle is not the best thing. I'll keep that in mind.

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