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DD knock rattle? I'm lost

This is a discussion on DD knock rattle? I'm lost within the General Help forums, part of the LSx Technical Help Section category; Thanks I'll add that stuff to my list, I had some people suggest cracked transmission mounts and maybe a cracked ...

  1. #21
    Junior Member thefridge's Avatar
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    2002 Pontiac Trans am ws6

    Thanks I'll add that stuff to my list,
    I had some people suggest cracked transmission mounts and maybe a cracked flywheel, judging from my video and the info I've provided do either of those sound legit,


    Also has anyone here ever even heard a sound like that before?

  2. #22
    Your friendly policeman FinZ28's Avatar
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    2001 Chevy Camaro Z28

    What's your oil pressure look like when it's idling? How about when you're driving? What does the oil pressure gauge indicate when you're in park with the engine idling once the car gets up to operating temp?
    Last edited by FinZ28; 06-12-2012 at 11:47 PM.
    2001 Chevy Camaro Z28 A4
    SLP cold air intake/lid, SLP smooth bellow, Pacesetter LT's, ORY, Magnaflow exhaust, BMR STB, adjustable Panhard rod, SFC's, LCA's, 1LE sway bars, cross-drilled rotors

  3. #23
    Junior Member thefridge's Avatar
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    2002 Pontiac Trans am ws6

    update i finnaly pulled the oil pan because a few friends said after hearing it in person that it sounded much more mechanical than fuel related so i am starting there now, i took some pics and am wondering what i should be looking for on the bottom side of the motor dont know much about whats going on down there. thanks

    IMG_0720.JPG
    IMG_0716.JPGIMG_0717.JPGIMG_0718.JPGIMG_0719.JPGIMG_0720.JPG
    Last edited by thefridge; 07-15-2012 at 06:21 PM.

  4. #24
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    did you find any metal shavings or anything in the oil pan? I would check to make sure nothing is loose while your down there. Doesn't hurt to look for a worn bearing.

  5. #25
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Can't tell anything from the pictures..

    Reach up in there with your fingers and give the rod caps a wiggle.

    If any one of them move around easier than the others you have a spun rod bearing.

  6. #26
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by thefridge View Post
    ok im really in need of help here my 2002 ws6 is a daily driver and my wife is starting her new job soon so i cant drive hers to work anymore,
    ok here goes
    ive got a sound a code and loss of power and it shakes all through the pedal and shifter.
    sound is like a rattle/knock this is in idle and speeds up with rpm
    code is p0300
    what i have done,
    put 93 in it ( i ran 87 for a month or so bc of $)
    pulled valve covers, springs, and everything there looks ok to me,
    pulled plugs, 2 of them were extremely more worn than the others, i cant remember now which cylinders they were but i know they fire right after each other in the sequence,
    so i replaced the plugs, and finnaly put my long tubes on that have been sitting in the garage for a year,
    anyway started car up after everything was put back together and the sound is still there, drove it arround the block and noticed the lack of power,
    so that is what i have done, please if some of you ls1 gods out there got something i can do, or if you know a thread that can point me in the right direction please let me know thanks in advance
    Quote Originally Posted by thefridge View Post
    . Video of the sound it's more prominent on top and passenger side
    Flex plate broken, or converter/main pump issue.. imho

    Broken flex plate can destroy your trany pump.

    I would'nt run it much more.. If @ all till you find the issue.
    Last edited by Smittro; 07-19-2012 at 03:37 AM.

  7. #27
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by thefridge View Post
    ok im really in need of help here my 2002 ws6 is a daily driver and my wife is starting her new job soon so i cant drive hers to work anymore,
    ok here goes
    ive got a sound a code and loss of power and it shakes all through the pedal and shifter.
    sound is like a rattle/knock this is in idle and speeds up with rpm

    code is p0300
    what i have done,
    put 93 in it ( i ran 87 for a month or so bc of $)
    pulled valve covers, springs, and everything there looks ok to me,
    pulled plugs, 2 of them were extremely more worn than the others, i cant remember now which cylinders they were but i know they fire right after each other in the sequence,
    so i replaced the plugs, and finnaly put my long tubes on that have been sitting in the garage for a year,
    anyway started car up after everything was put back together and the sound is still there, drove it arround the block and noticed the lack of power,
    so that is what i have done, please if some of you ls1 gods out there got something i can do, or if you know a thread that can point me in the right direction please let me know thanks in advance
    This is what makes me think it's the flex plate, or T-converter.

    Idles too good for it to be anything else imho..
    Last edited by Smittro; 07-19-2012 at 03:45 AM.

  8. #28
    Junior Member thefridge's Avatar
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    Sorry I haven't updated I was deployed, anyway it's a t56 so flex plate/ t converter, don't thnk it's those lol

  9. #29
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Haha yes that changes things..lol

  10. #30
    Member DaddySS's Avatar
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    Pull the plugs and check if one is wet. Get a mechanics stethoscope and try to isolate the sound. I had a similar noise that turned out to be a bad cam that then chewed up the the lifetr rollers.

  11. #31
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    Seeing as you just got the headers installed have you re-checked the header bolts? sometimes they can back out of the hole a little and cause a leak, Also depending on the brand/type of gasket used you may have a leak at one of the gasket contact points?....

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