Tran Cooler Lines
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  • 1 Post By ghettomike
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Tran Cooler Lines in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Could someone please tell me if the cooler line fitting going to the rad needs a special tool for removal ...
  1. #1
    Tom's Caddy's Avatar
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    Tran Cooler Lines

    Could someone please tell me if the cooler line fitting going to the rad needs a special tool for removal or just a flare nut wrench and if so what size please. Thanks.

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  3. #2
    briggy's Avatar
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    Re: Tran Cooler Lines

    Quote Originally Posted by Tom's Caddy View Post
    Could someone please tell me if the cooler line fitting going to the rad needs a special tool for removal or just a flare nut wrench and if so what size please. Thanks.
    It's a special tool, the reason being there is a guard on it which which prevents a standard wrench from turning it. See pic below


  4. #3
    ghettomike's Avatar
    ghettomike is online now Cadillac Owners Master
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    Re: Tran Cooler Lines

    GM has a "J" tool for the line.
    one of the 2 lines you can wrench off, the other oe if you try itwill break the fitting on the line.
    the fitting is a push in to that bolt actually which is what the "J"tool is for.

    take it off and put in a aftermarket cooler...save yourself a grand...wish i knew enough to do that at the time.

    or contact cadillac customer service here and complain, which will still go nowhere because they dont care that they made a very flawed transmission cooler system. (im bitter about this major defect)
    Ikera likes this.

  5. #4
    Tom's Caddy's Avatar
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    Re: Tran Cooler Lines

    Quote Originally Posted by briggy View Post
    It's a special tool, the reason being there is a guard on it which which prevents a standard wrench from turning it. See pic below

    Thanks guys, I just had the dealer change the lines only, wow $700. I think the line ( at the rad driver side might just be weeping, No drips. ) Was hoping to maybe see if it just needed a little turn? That "J" tool could I buy one? Thanks for the help guys.

  6. #5
    Ikera's Avatar
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    Re: Tran Cooler Lines

    you should have probably read this post before you went to a dealer

    http://www.cadillacforums.com/forums...ocumented.html

    fact is, your brand new lines are still less reliable than an external oil cooler setup. And even if you lines don't blow out, your radiator can still fail internally mixing your Transmission oil and engine coolant with no signs of damage from the outside until the coolant overflow tank overflows with chocolate milk.
    P.S. chocolate milk does qualify as Dexron III or Dexron VI transmission fluid and should be flushed out immediately

  7. #6
    Tom's Caddy's Avatar
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    Re: Tran Cooler Lines

    Quote Originally Posted by Ikera View Post
    you should have probably read this post before you went to a dealer

    http://www.cadillacforums.com/forums...ocumented.html

    fact is, your brand new lines are still less reliable than an external oil cooler setup. And even if you lines don't blow out, your radiator can still fail internally mixing your Transmission oil and engine coolant with no signs of damage from the outside until the coolant overflow tank overflows with chocolate milk.
    P.S. chocolate milk does qualify as Dexron III or Dexron VI transmission fluid and should be flushed out immediately
    I have read briggy's post and do not want to debate tran coolers. I think in the cold winters that I have here worse then Vancouver, it is not for me. Talked to many people and I know gettomike will be mad but some trusted Cadillac dealers tell me it is not a very big issue. Just had it done yesterday and it is my wife's ride, I drive my DTS, so I will have a better look at it over the weekend to see if it is weeping or was just left over from the line replacement. The lines were not leaking before at the rad but at the crimps so they had to be replaced. But I'm still wondering, am I able with a flex flare wrench or "J" tool be able to give it a slight right turn if needed. I don't want to start a war over tran coolers please.

  8. #7
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    Re: Tran Cooler Lines

    Quote Originally Posted by Tom's Caddy View Post
    Just had it done yesterday and it is my wife's ride, I drive my DTS, so I will have a better look at it over the weekend to see if it is weeping or was just left over from the line replacement. The lines were not leaking before at the rad but at the crimps so they had to be replaced. But I'm still wondering, am I able with a flex flare wrench or "J" tool be able to give it a slight right turn if needed. I don't want to start a war over tran coolers please.
    The transmission cooler line fittings are a major weak link, the fine aluminum threads of the fittings will strip without much warning. Beware, over tightening the fittings will increase your chances of a failure. Good luck.
    ghettomike and Tom's Caddy like this.

  9. #8
    CTSM is offline Cadillac Owners Enthusiast
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    Re: Tran Cooler Lines

    The only tool that worked for me is this one from Lisle: Lisle 39960



    http://www.oreillyauto.com/site/c/de...&keyword=39960

    It's not only the diameter that is important, that indented lip is essential in entering the nut and expanding the snap ring that is inside the aluminum nut.

  10. #9
    ghettomike's Avatar
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    Re: Tran Cooler Lines

    Quote Originally Posted by Tom's Caddy View Post
    I have read briggy's post and do not want to debate tran coolers. I think in the cold winters that I have here worse then Vancouver, it is not for me. Talked to many people and I know gettomike will be mad but some trusted Cadillac dealers tell me it is not a very big issue. Just had it done yesterday and it is my wife's ride, I drive my DTS, so I will have a better look at it over the weekend to see if it is weeping or was just left over from the line replacement. The lines were not leaking before at the rad but at the crimps so they had to be replaced. But I'm still wondering, am I able with a flex flare wrench or "J" tool be able to give it a slight right turn if needed. I don't want to start a war over tran coolers please.
    you were lied to....
    http://www.cadillacforums.com/forums...hanks-tow.html
    http://www.cadillacforums.com/forums...ler-issue.html
    http://www.cadillacforums.com/forums...-2003-sts.html (on a STS
    http://www.cadillacforums.com/forums...r-stopped.html
    http://www.cadillacforums.com/forums...ease-step.html
    http://www.cadillacforums.com/forums...il-cooler.html
    http://www.cadillacforums.com/forums...-radiator.html
    http://www.cadillacforums.com/forums...luid-line.html
    http://www.cadillacforums.com/forums...reak-down.html
    http://www.cadillacforums.com/forums...ppy-leaky.html (Escalade)
    http://www.cadillacforums.com/forums...ns-cooler.html (aftermarket fix attempt)
    http://www.cadillacforums.com/forums...-radiator.html
    http://www.cadillacforums.com/forums...lled-year.html
    http://www.cadillacforums.com/forums...oler-leak.html
    http://www.cadillacforums.com/forums...nny-lines.html
    http://www.cadillacforums.com/forums...nny-fluid.html
    http://www.cadillacforums.com/forums...ling-line.html
    http://www.cadillacforums.com/forums...verywhere.html
    http://www.cadillacforums.com/forums...-finished.html
    http://www.cadillacforums.com/forums...ase-reply.html
    http://www.cadillacforums.com/forums...wont-move.html
    http://www.cadillacforums.com/forums...car-ready.html
    http://www.cadillacforums.com/forums...verywhere.html
    http://www.cadillacforums.com/forums...al-reward.html
    http://www.cadillacforums.com/forums...-question.html
    http://www.cadillacforums.com/forums...ts-luxery.html
    http://www.cadillacforums.com/forums...ose-leads.html
    http://www.cadillacforums.com/forums...oblem-diy.html
    http://www.cadillacforums.com/forums...ion-lines.html
    http://www.cadillacforums.com/forums...oler-line.html (preventative inquiry)
    http://www.cadillacforums.com/forums...ou-have-3.html (See post #37)


    Need more proof or do you still believe your trustworthy dealership?

    ----------

    Quote Originally Posted by CTSM View Post
    The only tool that worked for me is this one from Lisle: Lisle 39960



    http://www.oreillyauto.com/site/c/de...&keyword=39960

    It's not only the diameter that is important, that indented lip is essential in entering the nut and expanding the snap ring that is inside the aluminum nut.
    this looks similar to what the GM tech showed me...but its been a while since ive seen it.

  11. #10
    Tom's Caddy's Avatar
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    Re: Tran Cooler Lines

    You guys are all great, thanks so much for all the input. I know you have proof gheetomike.

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