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Thread: Engine issues?

  1. #1
    Member Tepot's Avatar
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    Sep 2005
    Moncton, NB, Canada
    1974 Metalic Blue L-48 Coupe 4 speed
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    Default Engine issues?


    i hope this is not a sign of an possible engine rebuilt. It happened a few times this summer. I'll be driving without no problems and all of a sudden the oil pressure gauge will show zero pressure and when i rev the engine 1 to 3 times the pressure goes up to normal again.

    Now could it be a problem with the gauge or is it a serious problem with my engine?

  2. #2
    Moderator bill81vette's Avatar
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    Jan 2004
    1981 dark blue metallic
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    I would check the gauge and the sending unit 1st..
    Perhaps a electrical issue....
    Bill and Gail...save the wave
    NCRS member 42415
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  3. #3
    Technical Writer for Internet & Print Media
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    Jan 2001
    CenCoast CA
    71 04 12 19
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    Until you diagnose and repair, don't run the engine under load.
    If, in fact, oil pressure is dropping to zero; engine failure, if it has not already taken place, is likely if you run it under load.

    First thing to do is install/connect a known good oil pressure gauge, start the engine and see if the oil pressure behaves the same.

    If it does, pull the oil filter, cut it open and inspect for debris. If you find visible metal debris, overhaul the engine. If you don't, drop the pan and pull the oil pump. Inspect and replace as necessary.

    If the oil pressure, read by your known good gauge, is correct, troubleshoot the sensor and gauge and replace parts as necessary.

    Good luck.

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