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oil leak

This is a discussion on oil leak within the General Help forums, part of the LSx Technical Help Section category; Over the past few weeks I've noticed oil on my pavement where I park, I didn't really think much of ...

  1. #1
    rice,its what's fo dinner LeadFarmer's Avatar
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    oil leak

    Over the past few weeks I've noticed oil on my pavement where I park, I didn't really think much of it until my low oil light came on yesterday. After taking a look under the car I found that all the seals and oil plug were dry, so I tried to follow the oil trail and it lead towards the back of the passenger side of the motor, towards the back of the intake manifold. My first guess was a cracked OPSU leaking oil, but isn't that on the driver side? Any ideas?

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    Member c5z28's Avatar
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    Get someone with small arms to reach back there while it runs. Another option is to get a dye and black light and try and follow it that way.

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    Senior Member INMY01TA's Avatar
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    I'm guessing intake manifold or rear main seal..

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    rice,its what's fo dinner LeadFarmer's Avatar
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    it's a very small amount so I'm not too worried, but my dad is taking it to his shop thurs. They're going to take the manifold off and see if they can find the leak. Once they figure it out i'll update

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    Veteran 0rion's Avatar
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    no oil flowing through or to the intake.....probably meant valve cover. I'd check there or the rear main.

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    Retired NOT tired SteveC's Avatar
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    I had the same problem, and it turned out to be a cracked oil pressure sensor that sits behind the intake manifold. It is made of plastic.

    They had to remove the intake manafold (ofcourse) to get to it.

    SteveC

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    rice,its what's fo dinner LeadFarmer's Avatar
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    Quote Originally Posted by SteveC View Post
    I had the same problem, and it turned out to be a cracked oil pressure sensor that sits behind the intake manifold. It is made of plastic.

    They had to remove the intake manafold (ofcourse) to get to it.

    SteveC
    YUP! that was my problem, I pulled everything off yesterday and it was cracked. After my dad took it to his work to replace it they also found a clogged pvc valve? which was causing pressure to build up which was making the leak from the sensor worse.

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    Moderator Cutlass's Avatar
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    Quote Originally Posted by LeadFarmer View Post
    they also found a clogged pvc valve? which was causing pressure to build up which was making the leak from the sensor worse.
    well that doesn't exactly make sense. The PCV doesn't have anything to do with engine oil pressure, but a plugged PCV can cause high crankcase pressure and that cause seals and gaskets to blow out and leak oil.

  9. #9
    Ricekiller z28punk's Avatar
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    haha I have had a leak from the same area for 2 years now. I always just said i'll fix it when I do my cam swap. unemployment really kills Cam swap plans. this winter for sure tho.

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