3.6L 05 CTS engine vibrations seen and felt inside while idle
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, 3.6L 05 CTS engine vibrations seen and felt inside while idle in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Hi. I just got my car back from service where i had the timing chains replaced. the car has 123k ...
  1. #1
    bowser1724 is offline Cadillac Owners Member
    Automobile(s): 05 CTS 3.6, 06 DTS
    Join Date
    Aug 2013
    Posts
    3

    3.6L 05 CTS engine vibrations seen and felt inside while idle

    Hi. I just got my car back from service where i had the timing chains replaced. the car has 123k mi. Prior to bringing it in, i did not notice anything other than the timing chain chatter. THat is now gone, but in its place is a vibration that i can feel when sitting at a stop light or in park in my driveway. When i say i can feel it, i mean if i put my knee against the door panel, or my hand on the passenger headrest. When i say i can see it, the shroud on top of the motor i can visually see it vibrating. I do not feel anything abnormal while in motion. I took a quick look but i do not see anything wrong. No engine codes, no check engine light. I called the dealer and they said this is normal for high mileage vehicles. THe problem is it was not there prior to the repair. Any advice is appreciated.


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  3. #2
    junttiej is offline Cadillac Owners Member
    Automobile(s): 2005 SRX, 2011 CTS Sport Wagon
    Join Date
    Jun 2016
    Posts
    3

    Re: 3.6L 05 CTS engine vibrations seen and felt inside while idle

    I just fixed mine with the same problem - new motor mounts did the trick. My symptoms were ran perfect, no codes, 160K miles, but an irritating vibration at 600 RPM - didn't matter if it was in P,N,R. Raise RPM to 700 and vibration goes away. This is an easy fix - definitely a DIY, you just need 13/16" shallow and deep well sockets and a ratchet that pivots at the head so that the bar can drop below parallel. Two nuts per mount come off easily - as soon as I took them off it was obvious that this was the problem. You also need to remove the cross bar above the engine so that you can raise the engine with a jack. This was easy on my 3.6L; took about an hour and cost me $200 (don't buy cheap Chinese mounts).

  4. #3
    Henryk is offline Cadillac Owners Member
    Automobile(s): 2004 CTS 3.6L V6
    Join Date
    Jun 2016
    Posts
    3

    Re: 3.6L 05 CTS engine vibrations seen and felt inside while idle

    have the same vibrations. they are not incredibly noticeable to me really, but if i don't fix it whats the worse case scenario?

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