Crankcase oil drip

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Xenergiserx, Apr 10, 2021.

  1. Xenergiserx

    Xenergiserx Bobtail Member

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    Hello truckers! I have a problem with oil dripping from crankcase vent , oil is coming out from that tube that goes down . I put one of those maintenance free filter and it didn’t help. Then got a new filter from Cummins and it didn’t help. I got no codes , no black smoke. Just a gallon of oil every 1500 miles.
    Prostar 2015 Cummins isx15
     
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  3. Smellfunny

    Smellfunny Road Train Member

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    How many miles on engine? Over 750K and you are probably heading toward engine overhaul. These new engines are not million + engines. If you had it new and maintained it above and beyond then maybe.
     
  4. Xenergiserx

    Xenergiserx Bobtail Member

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    Feb 2, 2021
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    505454 miles. 14643 engine hours. Thanks for the replying
     
    Smellfunny Thanks this.
  5. Smellfunny

    Smellfunny Road Train Member

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    Sometimes it takes a while for answers. I don't get on here as often any longer and I am not a expert by any means so wait and see what others say. I am sure a little amount coming out is ok if you have the free flow non filter in there. An excessive amount is cause for concern.
     
  6. little cat 500

    little cat 500 Road Train Member

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  7. drivinhome

    drivinhome Light Load Member

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    If you posted correctly you said I gallon of oil in 1,500 miles. If you meant 15,000 then that is not too bad. If it is 1,500 then that is bad. It’s on its last leg. You may want to have it checked out by a good mechanic. Make sure it’s not leaking anywhere.
     
    little cat 500 Thanks this.
  8. Lazer

    Lazer Medium Load Member

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    Does the engine consistently run ‘hot’ or real close to the temp that the engine fan kicks on?
    Did you recently change brands of motor oil, and this problem started?
     
  9. Xenergiserx

    Xenergiserx Bobtail Member

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    No no other leaks. If I’m idle there no oil on the floor. Just in front of the oil pan. But not coming from gasket. I’ll take it tomorrow to the tech let you guys know what’s wrong
     
    Smellfunny Thanks this.
  10. Smellfunny

    Smellfunny Road Train Member

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    I forgot about you saying 1 gallon every 1500 miles in my second response. Yeah that isn't good.
     
  11. Xenergiserx

    Xenergiserx Bobtail Member

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    Guys so i stopped in a rest area and put the no maintenance filter back. And boom. Mpg jumped to 12.5 at 65 mph. In NM. No downhill. Power is back. Thanks guys
     

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