How is it possible for an engine{1988 small block chevy}to literally blow oil out of the dipstick tube?

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  • Dan B
    Lv 7
    2 months ago
    Favorite Answer

    I had that exact problem. Turns out to be a plugged PCV line going into the vacuum port of the carburetor. Your plugged line could be the PCV valve itself or some point along the line. When that line is plugged, crankcase pressures build up and force oil from any orifice that can be found (oil dip stick tube,seals or gaskets, etc).

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  • M.
    Lv 7
    16 hours ago

    If your piston rings allow more blowby than the PCV system can evacuate, then oil can come out of many strange places, including the rear main seal, the front seal, the oil pan gasket, valve cover gasket, intake manifold gasket, the distributor gasket, the inside of the distributor, etc.

    -Engine overhaul mechanic and general automotive mechanic since 1972

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  • 2 months ago

    Did it blow oil out of the dipstick tube or did it just do it in a literal manner (whatever that is)

    Yes, all things are possible, especially when you add the word 'literally'.

  • 2 months ago

    It would do that if the oil has been over-filled.

    It could do that if the crankcase has been pressurised due to a blown head gasket or a damaged piston/piston ring.

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  • Rick
    Lv 7
    2 months ago

    oh yeah,with a bad ring & a plugged PCV valve !!!

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  • 2 months ago

    The PCV valve is bad.

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  • 2 months ago

    if the engine is running when you check the oil.....

    never do that as it can physically harm you (hot oil spraying on you)

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