DD15 oil Leak

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by reelheavy, Jan 27, 2022.

  1. reelheavy

    reelheavy Light Load Member

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    6782BB39-8377-465C-ADFD-8E98BD6DBEA4.jpeg Hey All!
    I have a 2012 Cascadia with a DD15 725k miles and I discovered a oil leak after pre tripping this morning. I’m out on the road heading home. To hopefully find the culprit, it looks like it is a leak in front or on top of the oil pan the front vertical part of the oil pan is wet. I have been in the northeast so I have be having to run the truck all night to stay warm. I change oil every 15k miles.

    In July I did have the pick up tubes in the pan replaced. But never noticed any thing until

    Based off the picture has anyone had a similar issue and or what are some possible things to look for that may be the issue? Seals, gaskets, fittings, etc. cracked oil pan?
     

    Attached Files:

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  3. uncleal13

    uncleal13 Road Train Member

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    Judging by the location it is probably leaking from the crankcase breather. Here’s a good video about changing it.
     
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  4. baha

    baha Road Train Member

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    Ck. For sealing washer under drain plug if it was left off last oil change it maybe leaking from around plug?
     
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  5. reelheavy

    reelheavy Light Load Member

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    With this crankcase breather since it is on the passenger side of the block would it cause the leak to be in the front of the pan closer to the front bumper??
     
  6. uncleal13

    uncleal13 Road Train Member

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    No, middle of block.
     
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  7. goga

    goga Medium Load Member

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    How hard is it to get under and look? If it is way too hard, take it to any truck stop that has oil change pit and ask mechanic to look where it is leaking.
     
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  8. reelheavy

    reelheavy Light Load Member

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    Climbed under it with my flash light wiped the area off and waited for it continue to leak seen the oil couldn’t quite pin point where it was coming from, didn’t want to go crazy taking stuff apart laying on the ground in 10 degree cold with the wind blowing and limited tools.
     
  9. goga

    goga Medium Load Member

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    Add oil to the level and get home, there will be a better chance to do what's necessary.
     
  10. reelheavy

    reelheavy Light Load Member

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    710B0776-F53C-4BBE-A513-FB21FF0172C7.jpeg B8C3736D-ADEC-4036-B54F-199F809C2AEA.jpeg 83395D8F-6A09-4871-A2B2-302E6E884D2F.jpeg B87CCD8A-CC57-4952-81A0-05727996E8DB.jpeg

    More pics drain plug looked good. I think the culprit is up where I highlighted the picture in yellow CE1F48F4-F144-4147-9EF5-4CE57145F3D7.jpeg
     

    Attached Files:

  11. uncleal13

    uncleal13 Road Train Member

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    Looks like front seal. Probably didn’t quite get it right when they had the oil pan off for the seals on the oil pick up tubes.
     
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