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Thread: low pressure oil warning

  1. #1
    Join Date
    Feb 2006
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    1

    Default low pressure oil warning

    I have a 95 540, the car was working fine and now the low engine oil pressure comes on. This only happens at idle speed and only after the car is warmed. It does not do it when is cold. Need sugestions of possible problems. I was told that this could be caused by worn seals.

  2. #2
    Join Date
    Dec 2003
    Posts
    868

    Default The oil pump bolts vibrate loose on your car....

    It may be to the point where the oil pump is not snug and you are losing some pressure. I'd have the pan dropped ASAP and have the oil pump checked.

    If the pressure sensor was bad, it would tell you so. Can't hurt to test it but I would think your oil pump should be checked anyway.

    Quote Originally Posted by ram5757
    I have a 95 540, the car was working fine and now the low engine oil pressure comes on. This only happens at idle speed and only after the car is warmed. It does not do it when is cold. Need sugestions of possible problems. I was told that this could be caused by worn seals.

  3. #3
    Join Date
    Oct 2005
    Location
    Houston, TX (USA)
    Posts
    181

    Default What kind of oil you you put last change?

    If its happaning only when warmed up, then it is possible that you have wrong grade of oil when get too thin after warming up and thiner oil mean lower pressure. I had similar problem onec in my toyota (not BMW though) and I chaged to thiker oil that fied the problem.

    Just my though, you may or may not have same problem.

    Akhil

  4. #4
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    Dec 2003
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    Default

    Scotts right here, drop the pan and clean the bolt holes and use red loctite when you put the bolts back in.

    Quote Originally Posted by Scott H
    It may be to the point where the oil pump is not snug and you are losing some pressure. I'd have the pan dropped ASAP and have the oil pump checked.

    If the pressure sensor was bad, it would tell you so. Can't hurt to test it but I would think your oil pump should be checked anyway.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  5. #5
    Join Date
    Dec 2003
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    868

    Default Thicker oil would only be a bandaid for a larger problem in this case.....

    A zero weight oil should be able to be run with no problems.


    Quote Originally Posted by Akhil
    If its happaning only when warmed up, then it is possible that you have wrong grade of oil when get too thin after warming up and thiner oil mean lower pressure. I had similar problem onec in my toyota (not BMW though) and I chaged to thiker oil that fied the problem.

    Just my though, you may or may not have same problem.

    Akhil

  6. #6
    Join Date
    Oct 2005
    Location
    Houston, TX (USA)
    Posts
    181

    Default If he is not sure what kind of oil he put in last change then

    don't you think it would be wise to use right grade of oil and check before taking things apart? Specily when this problem come only when it warms up. It was just my thought , I may be wrong

    Akhil

  7. #7
    Join Date
    Dec 2003
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    Eastern Tennessee USi
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    Default

    I think when the V8s have a notorious oil pump bolt issue that they should be checked first.
    Quote Originally Posted by Akhil
    don't you think it would be wise to use right grade of oil and check before taking things apart? Specily when this problem come only when it warms up. It was just my thought , I may be wrong

    Akhil
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  8. #8
    Join Date
    Dec 2003
    Location
    Dunlap Illinois
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    1,198

    Default

    Listen to Scott and Jeff! They are trying to tell you about this issue with the V8 BMW engines. It's not a news flash, but others have found their bolts laying in the bottom of the oil pan and the pump dangling by one bolt.

    It's easier to drop the pan on a V8 than it is the 535 I-6. Take heed and take care of this problem as soon as possible or you can seize a $5000 engine.

  9. #9
    Join Date
    Mar 2005
    Location
    Houston, TX
    Posts
    505

    Default Ditto -

    Quote Originally Posted by Jr ///M5
    Listen to Scott and Jeff! They are trying to tell you about this issue with the V8 BMW engines. It's not a news flash, but others have found their bolts laying in the bottom of the oil pan and the pump dangling by one bolt.

    It's easier to drop the pan on a V8 than it is the 535 I-6. Take heed and take care of this problem as soon as possible or you can seize a $5000 engine.
    Just do it - now.

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