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  1. #1
    Member candlelit's Avatar
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    May 2006
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    Oklahoma City, OK
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    37
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    White
    98 Trans Am

    Need help with engine noise [video]

    My buddies 04 GTO started doing this today. We're unsure what it's coming from... lifters, springs, rods, bearings??? It does this at idle and when rpms increase it gets faster. Warm or cold, doesn't matter. The car is in a parking lot and trying to figure it out to determine if we can fix it there or not.

    Stock internal LS1, 55k miles. Camshaft: 232/236 FTI Custom Camshaft. .600 lift. Heads: Z06 #243 casting. These have the lightweight sodium-filled valves. Professionally installed Patriot Dual valvesprings.

    Video:

    Thanks!

  2. #2
    Impounded
    Join Date
    Oct 2007
    Location
    Beaver Dam KY
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    7,745

    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    I would definately have it towed home. That sounds rough as hell. Maybe pull that sides valve cover off and see it if there are any obvious things.

  3. #3
    Member slowgtp's Avatar
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    Sep 2007
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    Eaton Rapids MI
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    Red
    1999 Pontiac GTP

    Something in the valve train would be my guess.

  4. #4
    Junior Member
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    Aug 2007
    Location
    Orlando
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    White
    98 Camaro

    I say bent pushrod.

  5. #5
    NY Representative basballny2's Avatar
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    Aug 2007
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    Red
    2001 ws6

    Has he missed any shifts lately? DONT DRIVE the car anywhere. If hes missed some shifts its guna be a bent rod.

  6. #6
    Member candlelit's Avatar
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    Oklahoma City, OK
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    White
    98 Trans Am

    we definitely aren't running the car.

    today we pulled the valve covers off. all the rockers seem to be working properly except the 2nd from back on passenger side. we checked a few pushrods (hardened 7.425 rods) and they looked fine. now I think we should figure out the PTV clearance..

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