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milky oil.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by chevysrule, Sep 21, 2002.

  1. chevysrule

    chevysrule Registered Member

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    i just got my new 383 in my truck. it came as a short block, but i put my 400sbc heads on it. now only after about 2 minutes of running it the oil turns cream colored. the intake manifold is not leaking. what else could it be??
     
  2. POWERMAD

    POWERMAD 1/2 ton status

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    Did you put steam holes in the head gasgets?
    Something is way wrong if you have milky oil after a few minutes of running.
     
  3. HarryH3

    HarryH3 1 ton status Author

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    DO NOT RUN THE ENGINE UNTIL YOU HAVE THE PROBLEM SOLVED AND FRESH OIL IN IT!!!
    There are 5 places I can think ofoff the top of my head that will let coolant get into the engine. Head gasket, intake gasket, cracked head, cracked intake, or cracked block. But don't run it again until you find the coolant source. Anti-freeze mixed with oil will ruin the engine bearings quickly. /forums/images/icons/mad.gif
     
  4. SWAMPRNR

    SWAMPRNR 1/2 ton status

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    Sounds like coolant in the oil. Like POWERMAD said the 400 heads require a steam hole for use on a 383.
     
  5. Sandman

    Sandman 3/4 ton status Author

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    You need the steam hole, but that in itself would not cause the problem. Do what these guys said and pull the top end off and try to find the problem.
    /forums/images/icons/frown.gif
     
  6. chevysrule

    chevysrule Registered Member

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    ok i re torqued the intake, and the heads. the gaskets have steam holes in them, i replaced the oil and filter, ran the motor with the valve covers off, and within 30 seconds milky oil began to pump out badly from an intake rocker arm(the third one back on the drivers side.)I am stumped. It kind of looks like it could be leaking from the intake manifold directly above thant lifter, but hell what do i know.
     
  7. SWAMPRNR

    SWAMPRNR 1/2 ton status

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    Is the radiator loosing coolant ? At this point i would be for pulling it back apart and checking everything out.
     
  8. chevysrule

    chevysrule Registered Member

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    yes, the rad has lost coolant, and i am planning on tearing it apart, but what do i look for?do you think that i'll be able to tell where its leaking??how can it be leaking that bad , that after only 30-40 seconds greyish white oil is pumping from one of the rocker arms? /forums/images/icons/confused.gif
     

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