My 12v leaks oil

Discussion in 'Engine and Performance' started by Red_12v, Mar 6, 2017.

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  1. Red_12v

    Red_12v Junior Member

    Age:
    25
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    Joined:
    Mar 6, 2017
    Ram Year:
    1994
    Engine:
    12 valve cummins 1991
    I have a 94 12v cummins that leaks oil pretty bad. It dose not leak when it is sitting it only leaks when the engine in running. Anybody know what could be my issue? Thanks!!


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  2. GunnerJ

    GunnerJ Senior Member Military

    Age:
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    Location:
    US
    Ram Year:
    2008
    Engine:
    5.7 Hemi
    To be fair, it is a 12v cummins, and in my experience they leak like a sieve under normal conditions. Where is the leak coming from, up on top, down by the oil pan, front or rear of motor? Need more info

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  3. Dennis Shellito

    Dennis Shellito Junior Member

    Age:
    67
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    Joined:
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    Location:
    Ft. Morgan, CO
    Ram Year:
    2012
    Engine:
    Cummins IBS
    I had a car once that would only leave one drop of oil on the pavement when parked but it was using too much oil. I put up with it for a while because I couldn't see where it was leaking but finally I got tired of having to check/add the oil so often, so I jacked it up where I could get under it with the engine running and used a drop light to look. I found a steady drip coming from the oil pressure sending unit. I replaced the sending unit and the car didn't use much oil afterward. I am telling you this because if anybody gave you an opinion about your oil lead it would just be a wild ass guess, so get under your truck with the engine warmed up and running and look until you locate the leak.
     
  4. BWC

    BWC Senior Member

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    Location:
    Northern CO
    Ram Year:
    2003
    Engine:
    Cummins
    As mentioned above we will need a bit more info such as where about it is coming from in terms around the engine. I would think its around the front cover. Let us know
     
  5. crash68

    crash68 Senior Member

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    Ram Year:
    2015
    Engine:
    3.0 EcoDiesel
    Is it leaking or is it marking it's spot?
    LOL
     

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