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Thread: Oil in Intake Manifold with Blown Head Gasket?

  1. #1

    Oil in Intake Manifold with Blown Head Gasket?

    I thought my head gasket blew, I started taking the engine apart. I'm down to the heads now. But, I noticed oil and water in the intake manifold and intake plenum. I'm just wondering if this is something that should be happening with a blown head gasket, or if it is some other issue.

    The reasons I thought it was a blown head gasket are

    1. Driving and engine lost power, engine temp was normal
    2. Pulled over and had tons of white smoke coming out the tail pipe
    3. Drove home about a mile at low speeds and coasting mostly downhill about 2 minutes
    4. Engine never overheated, did rise, but never got in the red
    5. Pulled spark plugs, had oil and water on a few of them
    6. Turned engine over and had watery spray come out of spark plug hole

    Let me know what you think...
    1990 v6 4runner
    Engine: Chevy 4.3 Vortec/Edelbrock Performer Intake & Carburetor
    Front: Trail Gear 3in. Lift Leafs / Bilstein Shocks / ARB Air Locker
    Rear: Chevy 63in. Leafs / 3in. blocks / OME Shocks / ARB Air Locker
    Tires: 35 x 12.50 x 15

  2. #2

    Re: Oil in Intake Manifold with Blown Head Gasket?

    Oil always pools up a little bit in the intake manifold from it being drawn through the pvc, same goes if there's any water in the oil. It takes the highest point out. Pull your filler cap and see if there's water vapor or droplets there.

    What I'm getting at is it could be as simple as a bad intake gasket b/c coolant goes through there, or it could be the head gaskets. From the sound of things at this point you might as well pull the heads either way.

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