Rattling Noise Underneath Hood

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2009-2015 Cadillac CTS-V General Discussion Discussion, Rattling Noise Underneath Hood in Cadillac CTS-V Series Forum - 2009-2015; My 2012 CTS V is making a rattling noise underneath the hood... It only does this on slow acceleration, like ...
  1. #1
    ccrabtree is offline Cadillac Owners Member
    Automobile(s): 2012 Cadillac CTS-V
    Join Date
    Mar 2014

    Rattling Noise Underneath Hood

    My 2012 CTS V is making a rattling noise underneath the hood... It only does this on slow acceleration, like pulling around in a drive thru, backing out and pulling in driveways. Also I can put my foot on the brake & push on the gas and you can here it. Sounds almost like chains rattling together. I've taken it to the dealer and they are telling me its coming from the Super Charger, which they have already had to fix one time because of it making sounds like marbles bouncing around inside of it.... And it's not the heat shield for the catalytic converter. My dad seems to think its the bearings going out in the water pump. Any recommendations would be much appreciated! Thanks in advance

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  3. #2
    gohawks63's Avatar
    gohawks63 is offline Cadillac Owners Connoisseur
    Automobile(s): 2012 Black Diamond CTS-V Coupe
    Join Date
    Feb 2008
    Unless you're nearing six digits on your odometer, I highly doubt it's your water pump. Anything is possible, but as I said, unlikely.

    Most likely it's the supercharger. You don't have to scroll too far down through this forum to see similar threads and also that GM has acknowledged the issue and has extended the warranty on the blower.

  4. #3
    spearfish25 is offline Cadillac Owners Enthusiast
    Automobile(s): 2013 CTS-V Wagon, Glacier Blue, Red Brembos, SB wheels
    Join Date
    May 2013
    Naples, FL

    Re: Rattling Noise Underneath Hood

    Drives to dealer, replicates rattle sound, gets replacement blower under new extended GM warranty plan.

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