06 sts oil pan leak
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  • 1 Post By Neutrocuted
Cadillac STS Forum - 2005 through 2012 Discussion, 06 sts oil pan leak in Past Cadillac Vehicle Discussion; hey guys ive only had my sts for a few months it currently has 102xxx miles and i noticed a ...
  1. #1
    JT_alpha is offline Cadillac Owners Member
    Automobile(s): 06 sts 4.6 lh2
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    06 sts oil pan leak

    hey guys ive only had my sts for a few months it currently has 102xxx miles and i noticed a dot of oil on my drive way when i looked under and sure enough there is oil dripping from my pan so i figure must be the oil pan gasket. im just here to ask if there's any surprises i should be ready for before i pull it and it looks like it goes over the rack and pinion all the way to the trans. is this going to be a problem or should it slip Right out?

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  3. #2
    KRSTS is offline Cadillac Owners Enthusiast
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    Re: 06 sts oil pan leak

    Make sure its the oil pan before pulling it. Could be coming from somewhere else.

  4. #3
    JT_alpha is offline Cadillac Owners Member
    Automobile(s): 06 sts 4.6 lh2
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    Re: 06 sts oil pan leak

    Well I don't see any oil coming from above it starts at the oil pan I was just reading the older model Seville had to pull the whole engine to change the gasket and was wondering if its the same case for the 06 4.6 v-8 .

  5. #4
    CadiTamer is offline Cadillac Owners Fanatic
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    Re: 06 sts oil pan leak

    It doesn't look like the engine has to come out, but there seems to be a good bit of stuff that has to come out... Front cover has to come off, intermediate steering shaft, and the lower engine mount has to be disconnected. Can't tell, but the engine may have to be lifted a bit to get it out.

    This is all off of Alldata for the V6, so in practice with the N*, it is probably different.

  6. #5
    JT_alpha is offline Cadillac Owners Member
    Automobile(s): 06 sts 4.6 lh2
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    Re: 06 sts oil pan leak

    I don't want to get in there then find out I can't do it myself you know

  7. #6
    ddgm is offline Cadillac Owners Fanatic
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    Re: 06 sts oil pan leak

    First, I would clean the area really well, then look for the source of the leak. I would also get a quote on replacing the oil pan gasket if that is what it turns out to be.
    The more information you have, the easier it will be to decide your best course of action.

    Doug

  8. #7
    Ludacrisvp's Avatar
    Ludacrisvp is offline Cadillac Owners Connoisseur
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    Clean it up really well anywhere you see oil. Then get it changed out with some UV dye additive and you or the dealer with a uv light will be able to spot where the actual leak is from if there is one. Perhaps someone was a bit messy last time the oil was changed and its not really leaking.

  9. #8
    JT_alpha is offline Cadillac Owners Member
    Automobile(s): 06 sts 4.6 lh2
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    Re: 06 sts oil pan leak

    OK thanks guys I figured I would ask here before going to a shop

  10. #9
    jaime51 is offline Cadillac Owners Member
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    Re: 06 sts oil pan leak

    I recently noticed that my 2005 Northstar had oil that was leaking from the rear portion of the oil pan and I also assumed that it was the oil pan gasket. After bringing it in to the dealer to get it checked out, it turned out being 2 seals that were leaking from my front differential. Your best bet is to have someone diagnose your problem to save yourself some frustration.

  11. #10
    Neutrocuted's Avatar
    Neutrocuted is offline Cadillac Owners Fanatic
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    Re: 06 sts oil pan leak

    Direct from ALLDATAdiy for 2006 STS 4.6
    1. Install the engine support fixture.
    2. Drain the engine oil.
    3. Remove the front frame.
    4. Remove the front differential carrier, if equipped.
    5. Disconnect the electrical connector from the engine oil level sensor.
    6. Remove the engine oil level sensor from the oil pan.
    7. Remove the oil pan bolts.
    8. Important: The oil pan gasket is reusable unless damaged. Do not remove the gasket from the oil pan groove unless replacement is required.
    Remove the oil pan.

    1. Clean and inspect the oil pan. Refer to Oil Pan Cleaning and Inspection .
    Installation Procedure

    1. If required, install a new oil pan seal using the following procedure:
    1. Clean any residual oil from the seal groove.
    2. Work the seal into the pan groove in both directions around the pan.
    3. Position the oil pan to the crankcase.
    4. Notice: Refer to Fastener Notice in Service Precautions.
    Install the oil pan bolts. Tighten the bolts in the sequence shown:

    1. First Pass: Tighten the bolts to 15 Nm (11 ft. lbs.) .
    2. Final Pass: Tighten the bolts to 25 Nm (18 ft. lbs.) .
    3. Install the engine oil level sensor into the oil pan.
      • Tighten the sensor to 10 Nm (89 inch lbs.) .
    4. Connect the electrical connector to the engine oil level sensor.
    5. Install the front differential carrier, if equipped.
    6. Install the front frame.
    7. Fill the engine oil.
    8. Remove the engine support fixture.
    9. Inspect for oil leaks after engine start up.
    I would try re-torquing the bolts to see if that's the issue. PM me if you'd like to see the sequence pattern.

    Good luck!
    JT_alpha likes this.

  12. #11
    JT_alpha is offline Cadillac Owners Member
    Automobile(s): 06 sts 4.6 lh2
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    Re: 06 sts oil pan leak

    Thank you bro I really appreciate it

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