Motor mounts.
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  • 1 Post By danscan
Cadillac STS Forum - 2005 through 2012 Discussion, Motor mounts. in Past Cadillac Vehicle Discussion; How do I know when the motor mounts are bad. I have a 2006 Cadillac STS V8....
  1. #1
    Jneedom14 is offline Cadillac Owners Member
    Automobile(s): STS
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    Motor mounts.

    How do I know when the motor mounts are bad. I have a 2006 Cadillac STS V8.


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  3. #2
    danscan is offline Cadillac Owners Member
    Automobile(s): STS
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    Nov 2010
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    Re: Motor mounts.

    The easist way is to check is to grab a partner.
    1. Open the hood.
    2. Start the engine
    3. Have your partner get into the driver seat and while pressing the brake put the car in gear.
    4. You stand to the side of the car and watch the engine
    5. Your partner presses the gas while holding the brake.
    6. If the engine seems to almost lift off the side (3-4inch movement) you need a new motor mount (usually 2).
    7. Go get some cheap beer so you have enough money to pay the mechanic replace the driverside motor mount. (you can do the passenger side in about 1 or 2 hours)
    Guy.Seminerio likes this.

  4. #3
    curtc's Avatar
    curtc is offline Cadillac Owners Master
    Automobile(s): 2006 STS V8 1SF RWD
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    Oakdale, MN
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    When my driver side mount went out I had noticeable "pop" when taking off from a start with a heavy foot.

  5. #4
    JGarten is offline Cadillac Owners Member
    Automobile(s): 2005 Cadillac STS V8 1SF
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    Re: Motor mounts.

    Quote Originally Posted by danscan View Post
    The easist way is to check is to grab a partner.
    1. Open the hood.
    2. Start the engine
    3. Have your partner get into the driver seat and while pressing the brake put the car in gear.
    4. You stand to the side of the car and watch the engine
    5. Your partner presses the gas while holding the brake.
    6. If the engine seems to almost lift off the side (3-4inch movement) you need a new motor mount (usually 2).
    7. Go get some cheap beer so you have enough money to pay the mechanic replace the driverside motor mount. (you can do the passenger side in about 1 or 2 hours)
    You can do this yourself, you can see the engine clearly through the gap between the cowl and hood when the hood's wide open (duck your head a little). A little rocking is ok...when it looks as if it's trying to flip out of the engine compartment it's pretty obvious.

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