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Thread: Overhauled o-200 no oil pressure

  1. #1
    dbudd's Avatar
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    Default Overhauled o-200 no oil pressure

    I bought an overhauled 0-200 split the case and put a different cam in it. Now I have zero oil pressure. I pressurized the case and turned the engine over to prime it and as long as I had pressure to the case I had oil pressure. The only thing I did different is I left the gear off the front of the cam that drives the vac pump. I didnít want the gear slinging oil up and out of the breather tube. Any ideas?

  2. #2
    Rick-CAS's Avatar
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    Default Re: Overhauled o-200 no oil pressure

    You have to have the bolts in the front of the cam shaft either with or without the gear. Been there done that.

  3. #3
    dbudd's Avatar
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    Default Re: Overhauled o-200 no oil pressure

    Yep split the case today and put the gear on.thanks for your response

  4. #4
    Rick-CAS's Avatar
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    Default Re: Overhauled o-200 no oil pressure

    Had a customer who put a fresh overhauled C-90 on his Cub. Since it does did not need the vacuum pump they left the gear off. They could not get oil pressure when they ran it so they got several people involved and discovered that the bolt holes are open to a passage at the end of the cam. If left open no oil pressure.

  5. #5
    dbudd's Avatar
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    Default Re: Overhauled o-200 no oil pressure


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