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Weird sound in engine every few seconds

Discussion in 'Ask An Owner Operator' started by simongrewal, Aug 18, 2022.

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  1. Aug 18, 2022 #1
    simongrewal

    simongrewal Light Load Member

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    Sep 17, 2017
    Indianapolis IN
    0
    Hello everyone. I noticed weird chunking sound in engine (dd15) 2014 has 865000 miles on it. First I noticed decreased oil pressure since last service done which was 3000 miles ago. But there is no engine check light on. Today I noticed this weird sound. Please help what it could be.
    Thanks in advance. Please see this link
    https://youtube.com/shorts/BkPyq4z_XkE?feature=share
     
    simongrewal, Aug 18, 2022
    simongrewal, Aug 18, 2022
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  3. Aug 18, 2022 #2
    86scotty

    86scotty Road Train Member

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    Aug 27, 2017
    Appalachia
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    Weird. Any different under load or at different RPM's?
     
    86scotty, Aug 18, 2022
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  4. Aug 18, 2022 #3
    simongrewal

    simongrewal Light Load Member

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    Sep 17, 2017
    Indianapolis IN
    0
    No, its same. Frequency of sound changes when RPM are higher. Like at 1500 rpm i hear it every 2-3 seconds. I had head rebuilt 2 months ago. It was good till yesterday.
     
    simongrewal, Aug 18, 2022
    simongrewal, Aug 18, 2022
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  5. Aug 18, 2022 #4
    Dave_in_AZ

    Dave_in_AZ Road Train Member

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    Dave_in_AZ, Aug 18, 2022
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  7. Aug 18, 2022 #5
    Dadetrucking305

    Dadetrucking305 Heavy Load Member

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    Sep 15, 2011
    Cibolo,Texas
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    Record it and post the video
     
    Dadetrucking305, Aug 18, 2022
    Dadetrucking305, Aug 18, 2022
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  8. Aug 18, 2022 #6
    Dave_in_AZ

    Dave_in_AZ Road Train Member

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    He did. Original post.
     
    Dave_in_AZ, Aug 18, 2022
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  9. Aug 18, 2022 #7
    simongrewal

    simongrewal Light Load Member

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    Sep 17, 2017
    Indianapolis IN
    0
    simongrewal, Aug 18, 2022
    simongrewal, Aug 18, 2022
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  10. Aug 18, 2022 #8
    Dave_in_AZ

    Dave_in_AZ Road Train Member

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    Dave_in_AZ, Aug 18, 2022
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  11. Aug 18, 2022 #9
    simongrewal

    simongrewal Light Load Member

    50
    37
    Sep 17, 2017
    Indianapolis IN
    0
    Do you think it could be camshaft or anything in cam housing?
     
    simongrewal, Aug 18, 2022
    simongrewal, Aug 18, 2022
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  12. Aug 18, 2022 #10
    SmallPackage

    SmallPackage Road Train Member

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    Dec 20, 2019
    Marion Texas
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    If it were a gas burner engine I’d say it sounds like a backfire through the egr.
     
    SmallPackage, Aug 18, 2022
    SmallPackage, Aug 18, 2022
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