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  1. #1

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    Jun 2006
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    Louisville, KY
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    Oil Injector check Valves

    Are the oil line check valves necessary? What would cause backflow?


  2. #2
    Moderator RX951's Avatar
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    They are necessary in an oil injection system.

    They ensure a positive foward flow of oil and help prevent dribbling.

    I think the OEM pumps at roughly 2 psi.

    200:1 at idle and 32:1 at W.O.T.

  3. #3

    Join Date
    Jun 2006
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    Louisville, KY
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    Well tested those darn check valves. Drill attached to Oil injector. All three failed. Removed check valves from lines and oil dripped accordingly.

    "Should you be able to blow air through those check valves"?

    Both new injector and old (broken ear/tab) seemed to flow the same. A drop or two per second through each of the three lines. Obviously I can't determine RPM via drill, so I'm going to assume that its flowing properly at each RPM and throtle position.

  4. #4
    Moderator OsideBill's Avatar
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    I have a couple of oil pump complete systems with all plumbing one from a 65U 99 GP and one from 66V 01 GPR I was going to list on ebay this week at $10 each if you can use any of this to help let me know.

    OsideBill

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