1985 eldorado 4100 intake manifold gaskets install
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HT4100 4.1, 4.5, 4.9 Discussion, 1985 eldorado 4100 intake manifold gaskets install in Cadillac Engine Technical Discussion; Hi I have a 1985 Eldorado and noticed last oil change the oil was cloudy looks like choc milk. I ...
  1. #1
    FREDFLYPOGGER is offline Cadillac Owners Member
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    1985 eldorado 4100 intake manifold gaskets install

    Hi

    I have a 1985 Eldorado and noticed last oil change the oil was cloudy looks like choc milk. I know that means antifreeze is in the oil. The car had a repalcement block installed about 7 yrs ago(previous owner) GM part
    12364778. I am assuming the oil is coming from the intake manifold gaskets.??? I have the valve covers off and it looks like you have to remove the rocker arms. How is the manifold going to come off with the pushrods in the way? I have the 83 service manual so I am buying a used 85 service manual, proabably the same info but i want to be sure. Help suggestions would be appreciated.
    thanks
    todd

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  3. #2
    omston is online now Cadillac Owners Member
    Automobile(s): 1985 Seville
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    Re: 1985 eldorado 4100 intake manifold gaskets install

    You have to take the rockers off and pull the push rods out. Also you will need to pull the distributor and while your in there pull out the lifters but keep them and the pushrods in order so you can place them back where they came from very important to do this . Visually inspect the cam lobes by turning engine over by hand often the lobes will be flattened out a good indicator will be the lifters if its dished that lobe is probably bad.

  4. #3
    FREDFLYPOGGER is offline Cadillac Owners Member
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    Re: 1985 eldorado 4100 intake manifold gaskets install

    looks like it's not necessary to remove springs. i did find Intake Manifold Gasket Kit 03634742 ,this is a fix taht gm put out a while back
    thanks
    todd

  5. #4
    drewsdeville is offline Cadillac Owners Master
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    Re: 1985 eldorado 4100 intake manifold gaskets install

    In case you haven't done this yet - DONT TOUCH the rocker fasteners themselves. Rather, remove the whole support bar they are attached to. The rocker fasteners are self-tappers. Once removed, strength will not be restored on re-installation.

  6. #5
    omston is online now Cadillac Owners Member
    Automobile(s): 1985 Seville
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    Re: 1985 eldorado 4100 intake manifold gaskets install

    Yeah thats what i meant remove the whole rocker assembly not each one individually. When i did mine i just used napa gaskets it said they were superior for bi metal applications. I'm sure the quality has improved in 30 years. When you pull the distributor take reference pictures of the rotor in relationship to something on the car or mark the intake in relationship to it before you pull it. Also if the connection tube between thermostat housing and intake is stock its almost impossible to remove it with out breaking it . I got lucky and found a replacement on line.

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