LS6 Oil Leak Passenger Side
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2004-2007 Cadillac CTS-V General Discussion Discussion, LS6 Oil Leak Passenger Side in Cadillac CTS-V Series Forum - 2004 - 2007; A day after a recent track day, I discovered an oil leak on the passenger side of my 2004 CTS-V's ...
  1. #1
    repenttokyo is offline Cadillac Owners Connoisseur
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    LS6 Oil Leak Passenger Side

    A day after a recent track day, I discovered an oil leak on the passenger side of my 2004 CTS-V's engine. It's near the front - oil was all over the power steering hoses, and even on the lower control arm. I have oil on the bottom of the oil pan, but I don't think that's where it's coming from, since it seems unlikely it would have migrated from there all the way up front.

    The most likely answer is somewhere up on the passenger side of the engine - where are the common leak points I should be looking for? It's not dripping a mile a minute, but it is coating components. I also still have tranny fluid coming out on the track - which I assume is from the breather hose. Starting to get really wet down there!

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    OneFast V is offline Cadillac Owners Enthusiast
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    Re: LS6 Oil Leak Passenger Side

    Are you sure it was not power steering fluid? I have had power steering fluid spill over at the track..

  4. #3
    repenttokyo is offline Cadillac Owners Connoisseur
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    Re: LS6 Oil Leak Passenger Side

    Quote Originally Posted by OneFast V View Post
    Are you sure it was not power steering fluid? I have had power steering fluid spill over at the track..
    I am reasonably sure, but I am going to go look again today. I actually checked power steering fluid level the day before I hit the track, and this oil I am finding feels thicker....I am also thinking that if it was flowing over, it would be on the driver's side of the car more than the passenger, because of where the fill point/cap is.

    I replaced the hoses for the power steering along the area where the oil is congregating about 2 years ago, so I would be surprised if they were leaking again. Where did you notice your power steering fluid spillover when it happened to you?

  5. #4
    OneFast V is offline Cadillac Owners Enthusiast
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    Re: LS6 Oil Leak Passenger Side

    Quote Originally Posted by repenttokyo View Post
    I am reasonably sure, but I am going to go look again today. I actually checked power steering fluid level the day before I hit the track, and this oil I am finding feels thicker....I am also thinking that if it was flowing over, it would be on the driver's side of the car more than the passenger, because of where the fill point/cap is.

    I replaced the hoses for the power steering along the area where the oil is congregating about 2 years ago, so I would be surprised if they were leaking again. Where did you notice your power steering fluid spillover when it happened to you?
    Min was driver's side but it did run down the lines a ways. the second time with my "upgraded PS cooler", the cooler sprung a leak and shot PS fluid everywhere.

  6. #5
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    JDB
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    Re: LS6 Oil Leak Passenger Side

    Considering the fans can blow fluids everywhere, it's likely to be either. I zip tie a couple layers of an old tshirt around the power steering reservoir cap just because of this common issue.

    Take some samples from your power steering and motor oil dip sticks on a white towel and compare to the leak. Smell them too. I don't recommend licking them, but you might be in to that.

    Is there fluid on the hood's heat padding namely directly above the PS tank?

  7. #6
    repenttokyo is offline Cadillac Owners Connoisseur
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    Re: LS6 Oil Leak Passenger Side

    I was traveling yesterday and Thurs (and again tomorrow) but I am going to take a closer look at the car this afternoon. Fortunately, I don't have to drive it anytime soon.

    JDB - I will try the paper towel to examine the colors. It just seemed thick enough to be motor oil, but it was also dark and I was using a flashlight to peer up inside the engine.

    I will also try the t shirt trick when I am on the track. I wish there was a similar trick I could do for my tranny fluid track leak.

  8. #7
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    Re: LS6 Oil Leak Passenger Side

    you can also burn a sample of the fluids on a q-tip and observe the flame ... then burn the leaking fluid on a q-tip and see which one it matches

    they will burn different color flames
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    repenttokyo is offline Cadillac Owners Connoisseur
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    Re: LS6 Oil Leak Passenger Side

    Another great suggestion - this is why I love this board so much. Thanks for all of the help, guys.

  10. #9
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    Re: LS6 Oil Leak Passenger Side

    i can't take credit for that idea ... i did find it on here ... I think it was 00 Deville who first turned me on to the burnt q-tip idea
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  11. #10
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    Re: LS6 Oil Leak Passenger Side

    If it's engine oil, could it be coming from the dipstick tube? Valve cover gasket?

    Just trying to think of a relatively benign cause.
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    repenttokyo is offline Cadillac Owners Connoisseur
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    Re: LS6 Oil Leak Passenger Side

    I've managed to pinpoint the leak after cleaning and watching - it looks to be the front passenger side of the oil pan.

  13. #12
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    Re: LS6 Oil Leak Passenger Side

    Is it cracked? Is it the gasket? If it is the gasket maybe just tightening up the bolts may help.

  14. #13
    repenttokyo is offline Cadillac Owners Connoisseur
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    Re: LS6 Oil Leak Passenger Side

    Is it easy to over-torque the oil pan? I am thinking it could be loose as well (or gasket). The oil pan has a warning on it not to overtighten past the shop manual guidelines.

  15. #14
    pato is offline Cadillac Owners Fanatic
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    Is it leaking under the timing cover?

  16. #15
    repenttokyo is offline Cadillac Owners Connoisseur
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    Re: LS6 Oil Leak Passenger Side

    Well, it's the right front of the engine at the oil pan. The timing cover covers the entire front of the engine, correct? It seems to be more oil pan specific than timing cover specific. But I can check again later today (car is up on jack stands).

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