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Blue smoke and high capicity oil pump

This is a discussion on Blue smoke and high capicity oil pump within the Engine and Drivetrain (S30) forums, part of the 1st Generation Z (S30) category; Hello I just rebuilt my top end and have a good amount of blue smoke. It did not smoke prior ...


  1. #1
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    Default Blue smoke and high capicity oil pump

    Hello


    I just rebuilt my top end and have a good amount of blue smoke. It did not smoke prior to the top end rebuild.

    I installed a high capicity oil pump when I rebuilt adds about 15 to 20% more oil. Could this be the cause of the blue smoke. Am I flooding the engine with too much oil.

    The engine is stock.

    Thanks
    Glenn

  2. #2
    Registered User Nissanman's Avatar
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    Could easily be an over oiling issue.
    Higher capacity is one thing but has the pump got higher pressure as well?
    If your valve clearances to the guides is good and the valve oil seals are new, then I would go back to a stock oil pump and see the difference.
    Nissanman - just trying to help
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  3. #3
    Express Japanese Taxi ozconnection's Avatar
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    Did you attempt to increase your compression ratio by doing the head?

    How were your oil/compression rings?

    I have a turbo pump in my 'stock' engine......no blue smoke. Could be the pump, sure....do as Nissanman suggests and swap the old one back in for argument sake.

    As far as the head goes, it 'should' be good, yes?

    Good luck man!
    '78 280C sedan P30 Y70 L4N71B 4.11 H190 N/A A 'NEW" engine combination 131 rwhp.
    '71 240C coupe N42 NEW E88 FS5W71B 4.33 H190 Megasquirt V3.57 212 rwhp

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  4. #4
    Rust Free'ish zKars's Avatar
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    Please please oh please, let it only be the head was assembled without the valve seals..... or just one forgotten.

    Other than that? head gasket? You did use a new one, didn't you? block face cleaned properly? The oil pump is highly unlikely to be the direct cause.
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  5. #5
    Crumudgeon
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    An increase in oil pressure or volume should not have any effect on the oil burned in the engine. There's something wrong with the head or the oil control rings.

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    John

    How can I detect if the oil rings are wiped. All the spark plugs are carbonized...black

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