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Poll: Engine Damage or Not?

Discussion in '40- & 55-Series Tech' started by baldboy, Aug 23, 2006.

What do you think is the motor status?

  1. You blew it, start looking for a new motor

    3.6%
  2. It probably has irreparable damage but might run

    3.6%
  3. It probably didn't hurt anything but don't do it again

    45.5%
  4. You are paranoid, the motor sustained no injury whatsoever

    47.3%
  1. baldboy

    baldboy

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    I started my truck (78FJ40, 2F) Five times only to hear it roar to full throttle every time. (The linkage for the butterflies somehow were incorrectly reinstalled, leaving them wide open :eek:). I immediately shut it off after each start.

    The motor ran STRONG before this incident.....it has between 47,000 and 147,000 miles on it, no knock no smoke prior to said incident.

    This is even more troubling to me being that I know how these motors SHOULD NOT be run at high RPMs, let alone full throttle startups.:frown:


    I heard no knocking or smoking, but man did it feel crummy to hear a 2F run so fast.
     
  2. cruiser88

    cruiser88

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    :D oh hell your fine its a cruiser
     
  3. baldboy

    baldboy

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    While you are right about the durability of a cruiser, the ONE thing I NEVER do while driving the 40 is rev the RPMs over 3500ish.

    EDIT-this was an estimate..... I need a tach too
     
    Last edited: Aug 23, 2006
  4. projektdotnet

    projektdotnet

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    then fix the carb and give'r a test run :flipoff2: oh and i've had mine to some decent RPMs with no trouble ;)
     
  5. my64fj40

    my64fj40

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  6. Tigerstripe40

    Tigerstripe40

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    Why?

    Redline on these motors is 4,000 rpms.
    Max HP is produced at 3800 rpms.

    I will run mine up to 4,000 and even 4500 rpms while getting onto the freeway onramp.
     
  7. projektdotnet

    projektdotnet

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    i need a tach :D
     
  8. mminter1973

    mminter1973

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    1986 fj60 350,000 miles stock 2f, never rebuilt :)
     
  9. Franky40

    Franky40

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    I voted paranoid, but I'd pull it anyway, nothing like the sound of a good v-8
     
  10. projektdotnet

    projektdotnet

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    you've GOTTA be kidding me?! 200k is normal but 350k?!?! wow i love toyota
     
  11. Ian Rogers

    Ian Rogers

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    I drove to Moab at 4000 RPM for 12hr not that big of a deal, they just suck gas
     
  12. camcruiser13

    camcruiser13

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  13. Tigerstripe40

    Tigerstripe40

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    Agreed.

    Of course, the sound of a healthy 2F with a good header and free flowing exhaust system sounds even better!
    :flipoff2:
     
  14. Robert LaDuke

    Robert LaDuke

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    hard to kill a 2F. I doubt you did any damage at all.
     
  15. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

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  16. IDave

    IDave

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    What do you think you have in there? A finely tuned race car engine? It's a frillin tractor motor. You ran it fast for a few seconds. Run it and see what you have, but I'd bet dollars to donuts it's finer than frog's hair!
     
  17. rgentry

    rgentry

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    Mark W. is the guru on LC engine internals, perhaps he will chime in. From what I have read from him in the past, the danger of over-revving comes from potential stretching of the connecting rod bolts, which would ultimately lead to throwing a rod. If you really think this is an issue, pull the oil pan and check (or replace) the bolts. But before you do, it would be good to hear from Mark.
     
  18. nuclearlemon

    nuclearlemon not an addict Moderator

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    i wouldn't keep doing it, but you're most likely fine if you didn't hear any knocking or see mass amounts of smoke
     
  19. honk

    honk

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    You got it broke in, it'll run nice from now on.
     
  20. rjcruiser

    rjcruiser

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    I think the motor is toast.....After you pull it, you need to crate it and ship it to me. :) I'll even let you pay for shipping.
     
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