Coolant issue! Leaking from back of motor, top of transmission.
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Coolant issue! Leaking from back of motor, top of transmission. in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; This leak has me stumped. It is leaking from what looks to be a capped fitting on top of the ...
  1. #1
    thinkjeremiah is offline Cadillac Owners Member
    Automobile(s): 02 cts
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    Coolant issue! Leaking from back of motor, top of transmission.

    This leak has me stumped. It is leaking from what looks to be a capped fitting on top of the transmission. When I pour water into the overflow tank, it immediately leaks out of the capped spot on the transmission. I followed all hoses and none go to this spot. I had to take the intake off to find the leak, it looks like there is a metal cap on top which has dislodged enough to let water leak out, I can stick a screwdriver back in there and move the cap round and round on the fitting. It is about the size of the tip of a pinkie finger. Anybody know what that is and how to fix it?

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  3. #2
    arogers260's Avatar
    arogers260 is offline Cadillac Owners Enthusiast
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    Quote Originally Posted by thinkjeremiah View Post
    This leak has me stumped. It is leaking from what looks to be a capped fitting on top of the transmission. When I pour water into the overflow tank, it immediately leaks out of the capped spot on the transmission. I followed all hoses and none go to this spot. I had to take the intake off to find the leak, it looks like there is a metal cap on top which has dislodged enough to let water leak out, I can stick a screwdriver back in there and move the cap round and round on the fitting. It is about the size of the tip of a pinkie finger. Anybody know what that is and how to fix it?
    Possibly your oil cooler, I just recently had a coolant leak which I traced down to the oil cooler cover. The silicone sealant failed and needed resealed. But it required more than just some sealant to repair.

  4. #3
    thinkjeremiah is offline Cadillac Owners Member
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    Re: Coolant issue! Leaking from back of motor, top of transmission.

    Nope, not the oil cooler. That is on top of the engine, this leak is from the top of the transmission area, behind the engine.

  5. #4
    arogers260's Avatar
    arogers260 is offline Cadillac Owners Enthusiast
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    Quote Originally Posted by thinkjeremiah View Post
    Nope, not the oil cooler. That is on top of the engine, this leak is from the top of the transmission area, behind the engine.
    Mine ran doen the back of the motor to the transmission area and also right by the exhaust manifold on the drivers side. But if you have that possibility eliminated I'm out of suggestions.

    ----------

    Have you put in a uv dye at all? If you haven't try that and get a uv flashlight, make sure the dye is dex-cool friendly. Not all dyes are.

  6. #5
    713CTS is offline Cadillac Owners Member
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    Guys I need help with my 03 3.2v6... Ok the check engine light came on one day then all of sudden I started going through 50/50 coolant...there's always a little puddle from the overflow tank on the drivers side. Seems like when the ac is on... There no problem. Fans seem to be working. So today I swapped out the coolant temperature sensor and the crankshaft position sensor (another story)... Check engine Light went off but ac wasn't blowing cold air and when I parked and cut the ac off... Coolant boiled over again!! No obvious leaks from anywhere else. I'm going to change the radiator cap today to see if that helps! Any suggestions?? Sorry if this is a repeat.

  7. #6
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    713CTS, a thread was started for you after you hijacked a thread in the Seville forums. Please don't hijack threads.

    http://www.cadillacforums.com/forums...vac-stack.html

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