S/C coolant level???
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Cadillac STS-V Series Forum Discussion, S/C coolant level??? in Cadillac V-Series Forums; A couple of weeks ago it was pointed out to me that my s/c coolant level was low... I picked ...
  1. #1
    06 STS Rob's Avatar
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    S/C coolant level???

    A couple of weeks ago it was pointed out to me that my s/c coolant level was low... I picked up a bottle of the GM coolant and topped it off. Since then, I've added about a quart of coolant to the system. Seems like half the time I check it, I have to add more. There are no signs of leaking anywhere. I have been checking it while warm, cold, running and off...
    Could there be an air pocket that hasn't worked it's way out. Are there seals within the cooler that could have blown causing coolant to be injected into the s/c. This is a small reservoir so adding a little at a time would take a few times to fill the system but I'm a bit concerned with why it went low to begin with.

    Update, just found on an xlr site the "proper" way to fill the s/c coolant. I am going to fill the coolant at the s/c by removing the cover plate. We'll see if this does the trick.

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    carter's_sts is offline Cadillac Owners Connoisseur
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    After the dealer flushed mine, I had to keep adding a little at a time for a while.

  4. #3
    fozjared is offline Cadillac Owners Member
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    Re: S/C coolant level???

    where would i even check the s/c coolant? apparently i was blissfully ignorant of this

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    PGA2B's Avatar
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    Re: S/C coolant level???

    Either the fill cap or the top of the S/C. The fill cap is the easiest. It is located by the battery.

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    fozjared is offline Cadillac Owners Member
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    Re: S/C coolant level???

    sweet, thx!

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    fozjared is offline Cadillac Owners Member
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    Re: S/C coolant level???

    yup fill cap reservoir is bone dry.. what kind of coolant should i get?

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    Guy.Seminerio is offline Cadillac Owners Connoisseur
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    Re: S/C coolant level???

    Ok car doesn't warn you of low coolant level in the sc. Good to know.

  9. #8
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    Re: S/C coolant level???

    If its to low and you drive hard and get the iat2 temps to high the car will go in to limp mode to keep you from melting it down. Ask how I know lol.
    GizmoQ and GizmoQ like this.

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    Guy.Seminerio is offline Cadillac Owners Connoisseur
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    Re: S/C coolant level???

    Haha damn. Well I'm gonna check it nevertheless.

  11. #10
    06 STS Rob's Avatar
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    Re: S/C coolant level???

    Quote Originally Posted by fozjared View Post
    yup fill cap reservoir is bone dry.. what kind of coolant should i get?
    Takes GM antifreeze/coolant, same as the radiator.
    I finally popped the cap on the s/c and coolant is defiantly full. Everything has been good the last few times I checked so feeling much better now.

  12. #11
    fozjared is offline Cadillac Owners Member
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    Re: S/C coolant level???

    sweet! thanks a bunch rob

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    This I need to do.

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    Quote Originally Posted by 1madstsv View Post
    If its to low and you drive hard and get the iat2 temps to high the car will go in to limp mode to keep you from melting it down. Ask how I know lol.
    Since no one asked, I'll bite.... How do you know?

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    boomys10 is offline Cadillac Owners Enthusiast
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    Re: S/C coolant level???

    omg he opened a can of worms, damn..

  16. #15
    1madstsv's Avatar
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    Re: S/C coolant level???

    Quote Originally Posted by Ludacrisvp View Post
    Since no one asked, I'll bite.... How do you know?
    When you buy a car with only 7500 miles you just assume its all good. Wrong 20 miles in to the 180 mile ride back home with the car and a E550 mb with a dad and two teen boys in it come up along side me and start pointing at my car. So I gunned it and it went in to limp mode coasted to side of road car stalled out and would not stay running. I tought I killed it but it turns out the s/c had no coolant in it at all topped it off and went on my way after I reset it.

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