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Knocking coming from engine

Discussion in 'Technical Chat' started by bambooshoots, Mar 21, 2011.

  1. Mar 21, 2011 at 2:16 PM
    #1
    bambooshoots

    bambooshoots [OP] Be a fountain, not a drain.

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    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    Hey guys, this problem is driving me nuts. Could really use some help of figuring out what the problem is.

    A few days ago I start noticing knocking coming from the engine, at idle, after a cold start and would fade away when the engine warmed up.

    Sounded like this (fast clicking because of a higher idle during cold start):

    [​IMG]


    Today, after driving around 40 miles round trip to the courthouse (thanks, Jury Duty), the knocking occurs even on a hot engine, and seems to have doubled up, like this:

    [​IMG]

    Anyone have this happen to them, or knows what's going on? Part of me thinks it's a rod, but the rest of me says no, cause that would be a large PITA.
    It's driving me nuts because it happens everytime I drive which reminds me constantly of the problem, like a nagging SO.

    Thanks in advance, guys.
     
  2. Mar 21, 2011 at 4:07 PM
    #2
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    What oil are you using?
     
  3. Mar 21, 2011 at 5:36 PM
    #3
    bambooshoots

    bambooshoots [OP] Be a fountain, not a drain.

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    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    Mobil1 5W-30 changed just a few weeks ago, and ever since I've got the truck I've run 91 octane fuel through it.
     
  4. Mar 21, 2011 at 5:40 PM
    #4
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Last plug change?
     
  5. Mar 21, 2011 at 5:42 PM
    #5
    bambooshoots

    bambooshoots [OP] Be a fountain, not a drain.

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    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    Last August, a DIY job with NGK Iridiums.
     
  6. Mar 21, 2011 at 5:44 PM
    #6
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    iridiums = No good Go back to the stock plug and see what happens.
     
  7. Mar 22, 2011 at 7:13 AM
    #7
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    What is it? (can't see the vids at work)
     
  8. Mar 22, 2011 at 7:14 AM
    #8
    bambooshoots

    bambooshoots [OP] Be a fountain, not a drain.

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    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    Unlikely. I believe that's a piece of electrical tape.
     
  9. Mar 22, 2011 at 7:16 AM
    #9
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Just an idea from another thread. Is your fan hitting the shroud? It would be towards the bottom of the shroud.
     
  10. Mar 22, 2011 at 8:55 AM
    #10
    bambooshoots

    bambooshoots [OP] Be a fountain, not a drain.

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    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    Yeah, I thought it looked like that too but it turns out it was just flapping around with the engine fan pushing air around. I cut it off and the same noise still occurs.

    Small update; cold started the truck this AM and the sound is back to tempo of the first video: single knocking. I'm sure if I drive it around for a while and let the engine get to operating temp it'll go back to the double knocking in the second vid..
     
  11. Mar 22, 2011 at 1:51 PM
    #11
    bambooshoots

    bambooshoots [OP] Be a fountain, not a drain.

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    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    That sounds like a nightmare.

    The sound does seem to be coming from the driver's side...although the vid on the first page of that thread is way different than mine: screeching vs. knocking.
     
  12. Mar 22, 2011 at 1:57 PM
    #12
    BlueT

    BlueT Well-Known Member

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  13. Mar 22, 2011 at 4:31 PM
    #13
    BlueT

    BlueT Well-Known Member

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    I just had a chance to watch video (could not at work) but that does not sound like rod knock. It sounds like its half of the RPMS of engine. I would check engine mount to see if it is not broken and if you are not hitting shroud. Check your PS fluid as well.
    BTW that would explain the change when engine gets hot, fan clutch engages more with temperature
     
  14. Mar 23, 2011 at 1:46 PM
    #14
    bambooshoots

    bambooshoots [OP] Be a fountain, not a drain.

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    2015 Honda Accord Sport
    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    Well, it appears that the problem has been solved..

    Looks like when I replaced the serp belt I missed ONE (1) groove on a pulley. I took a good hard look at how the belt was seated and noticed it looked off track on a pulley. I took the tension out of the belt, seated the belt correctly, started the engine, and no more knocking.

    Thanks to the guys who pointed me that direction. I feel like derp right now, screwing up something as simple as that. Though I'm not sure why it didn't manifest itself right away.

    Really glad it wasn't as severe as an oil pump going out (yet...)
     
  15. Mar 23, 2011 at 5:46 PM
    #15
    BlueT

    BlueT Well-Known Member

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    :thumbsup:
    Dont feel like derp. Anybody who worked on cars atleast once had that :facepalm:moment
     
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