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What is this knocking noise...lifter?

This is a discussion on What is this knocking noise...lifter? within the Internal Engine forums, part of the LSx Technical Help Section category; Lifters are under the heads...

  1. #81
    Member GNICTRY's Avatar
    Join Date
    Jun 2007

    2000 Trans Am WS6 Ram Air

    Lifters are under the heads

  2. #82
    Former Mopar Man 2002ssslp's Avatar
    Join Date
    Jun 2011
    Branchville, NJ

    Silver & Blue
    02 Camaro SS, 04 GTO

    It sounds to me like a bent pushrod. I would pull the valve covers and check for a cracked rocker or pushrod problem. Good luck.
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

  3. #83
    Join Date
    Apr 2012

    2001 trans am

    this guy posted later on and said it was in fact a bent pushrod i think this sound identical to the OP video as well as my car now but i still drive it, no misfire codes or any problems

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