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Noise In The Front Of The Engine

Discussion in 'Flat Fender Tech' started by ardan, Feb 22, 2020.

  1. Feb 29, 2020
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    How does the seal that slips into in the timing cover look?
     
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  2. Feb 29, 2020
    ardan

    ardan Member

    West Tennessee
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    I didn't pull the timing cover off today, I only the pulley off. I replaced the seal when I removed the timing cover weeks ago while I was working on it.

    It isn't leaking with the pulley off, so I can only assume that the seal is working....:)
     
  3. Feb 29, 2020
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    I think that groove shows the pulley is (or has been) off-centered. Big no-no.

    Since it was manufactured to be concentric, the bore and/or the key must have been oversized and it jammed in a non-concentric position. Either that or the tip of the crank is extremely f-ed up, which would be very unfortunate.
     
  4. Feb 29, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    That had been rubbing for a good amount of time, no doubt. Let's hope the end of the crank isn't messed up, seems a good possibility though. Maybe the key wasn't long enough and allowed the pulley to wobble? Best to get a new key too. Did I see shiny on the end of the pulley, like recently rubbing?
     
  5. Feb 29, 2020
    ardan

    ardan Member

    West Tennessee
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    Hi All,

    Visually the end of the crank looks OK, I sure hope it is. I have a new pulley ordered so I will post an update next week after it gets here and I get it installed.

    Thanks for all the help...
     
  6. Feb 29, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Make sure you use a new key and it's long enough.
     
  7. Feb 29, 2020
    ardan

    ardan Member

    West Tennessee
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    Will Do, Thanks...
     
  8. Feb 29, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Liberty Lake, WA
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    If that collar was running that off-center without an oil leak, I’m more concerned about your oiling situation up front.

    Concerning the key, the rubbing occurred at the keyway, which would imply a key was used that was too tall, which doesn’t make much sense since the collar is a slip fit over the crank, IIRC. Something seems off.
     
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  9. Feb 29, 2020
    45es

    45es Active Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Use care when installing the new pulley and key. I have seen where when installing the pulley, it also pushed the key further into the crankshaft's keyway causing it to ride up onto the radius at the back of the keyway. This prevented the pulley from being correctly aligned and true to the crank.
     
  10. Feb 29, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Exactly! No fit, not at all.
     
  11. Feb 29, 2020
    Ol Fogie

    Ol Fogie 74 cj5 304, 1943 mb

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    You said that the timing cover was removed previously, Was it reinstalled and lined up correctly? Was the new oil seal correctly installed, correct oil seal? What about the oil slinger washer is it in the correct location, installed or turned the wrong , undamaged? When oil pan was reinstalled did you use the same length bolts in the front area that bolts the oil pan to the timing cover? Lots of things to check if there is no run out of the crank shaft end. Just thinking out loud, I could be way off.
     
    Last edited: Feb 29, 2020
  12. Feb 29, 2020
    Ol Fogie

    Ol Fogie 74 cj5 304, 1943 mb

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    Just had another thought. Could the front main bearing cap bolts be loose? Causing the crank to flex downward when the front piston is comming up on compression stroke? However it would probably have low oil pressure or make a hammering noise if that was the case. Just trying to think out side the norm.
     
  13. Mar 1, 2020
    ardan

    ardan Member

    West Tennessee
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    Hi All,

    Thanks for all the ideas. We Pulled the oil pan and the timing cover, after cleaning and checking everything we were careful to put everything back correctly. The oil seal was the model that our part supplier recommended, I confirmed by looking up the part on the manufacturers website and visually comparing to the old one. We got new bolts all around but where sure to match the ones that were there.

    The ideas about the key riding high is something I really am concerned about. I don't remember having any issues but I can see how that would cause this issue. When I pulled the pulley (which was tight had to use a puller) the key looked ok but I would like to install a new one, does anyone know if I can replace the key without removing the timing cover. The new pulley will not be here till next week sometime.

    Thanks Again...
     
  14. Mar 1, 2020
    Ol Fogie

    Ol Fogie 74 cj5 304, 1943 mb

    Southern...
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    If you have one or access to a dial indicator, mount and check the crank end before you mount your new pulley.
     
  15. Mar 1, 2020
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    This.
     
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  16. Mar 1, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    The groove in the pulley is old wear. How long have you had the Jeep? Did you own it before you did all of the work you mentioned? Did you bend the pulley when taking it off or was it already bent?
     
  17. Mar 1, 2020
    Ol Fogie

    Ol Fogie 74 cj5 304, 1943 mb

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    your link did not work, please try again.
     
  18. Mar 1, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

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    I don't think it was a link but another way to say X2, or I agree. :)
     
  19. Mar 1, 2020
    Ol Fogie

    Ol Fogie 74 cj5 304, 1943 mb

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    your link did not work, please try again.
    Ah, what was I thinking.:crazy::)
     
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  20. Mar 1, 2020
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    "X2."

    I would try a dial indicator, or something like that.
     
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