2003 CTS losing coolant
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, 2003 CTS losing coolant in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; I have a cadillac cts i have a problem with the coolent it leaks alot i have to put one ...
  1. #1
    adrian386 is offline Cadillac Owners Member
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    2003 CTS losing coolant

    I have a cadillac cts i have a problem with the coolent it leaks alot i have to put one every week can some one let me know what can i do plz is my first cadillac..

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: i have 2003 cts

    Wrong forum. Moved from Engines; Other to the proper CTS group forum.

  4. #3
    mattfranz is offline Cadillac Owners Fanatic
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    Re: 2003 CTS losing coolant

    Look around the water pump and the radiator. You might want to check the coolant hoses too

  5. #4
    ChadM's Avatar
    ChadM is offline Cadillac Owners Member
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    Re: 2003 CTS losing coolant

    I am also having the same issue. I put in a gallon of coolant every week. Dealership cant find the leak. They even had it parked for 4 days with a puddle underneath 2 times and still nothing. I have no idea anymore with this car. I have an 06 cts.

  6. #5
    Firewalker is offline Cadillac Owners Fanatic
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    Re: 2003 CTS losing coolant

    I had the same problem. Ultimately, replacing the water pump solved my problem. No more leaks on my 2006 CTS.

  7. #6
    Bluehaze07's Avatar
    Bluehaze07 is offline Cadillac Owners Connoisseur
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    The water pump sounds correct. I'm about to replace mine this weekend. It's the second one I replaced.

  8. #7
    Teedoe's Avatar
    Teedoe is offline Cadillac Owners Fanatic
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    Re: 2003 CTS losing coolant

    I just started having this issue as well. I gotta get it checked and fixed ASAP.

  9. #8
    Bluehaze07's Avatar
    Bluehaze07 is offline Cadillac Owners Connoisseur
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    Quote Originally Posted by Teedoe
    I just started having this issue as well. I gotta get it checked and fixed ASAP.
    What's up bro!!!!!

  10. #9
    arogers260's Avatar
    arogers260 is offline Cadillac Owners Enthusiast
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    Re: 2003 CTS losing coolant

    Oil cooler cover is also a common spot to leak coolant. There is no gasket there and the silicone sealant fails over time.

  11. #10
    ghettomike's Avatar
    ghettomike is offline Cadillac Owners Master
    Automobile(s): 03 CTS 3.2L (Sold) / 09 CBR 600rr /2014 GMC Sierra
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    Re: 2003 CTS losing coolant

    do NOT put in a coolant system stop leak.
    i was loosing a lot of coolant and put a little bit in, it made my bad heater into a a/c unit...

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