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3406e Blowby On A 1lw Out Of Breather Tube Normal?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Jordonh, Aug 30, 2023.

  1. Aug 30, 2023 #1
    Jordonh

    Jordonh Light Load Member

    52
    38
    Jul 1, 2022
    North Carolina
    0
    Hello Y'all so I have a 3406e 1lw 14.6l with 242,819 miles that has little blowby. I don't have much blow by at idle little smoke and no drips only happens after a pull when we where coming down from Maryland to North Carolina. I've read around the forum/videos and people said it's quite normal for a old Caterpillar to have little blow by. Everything is original on the engine part just wanna be a 100% sure on this.

    Doesn't want to embed to post Video: https://youtube.com/shorts/TiIMgK25PCA?si=9xX6s7nYiksRokQ1
     
    Last edited: Aug 30, 2023
    Reason for edit: Adding video
    Jordonh, Aug 30, 2023
    Jordonh, Aug 30, 2023
    #1
    NightWind Thanks this.
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  3. Aug 30, 2023 #2
    BoxCarKidd

    BoxCarKidd Road Train Member

    4,536
    6,605
    Aug 26, 2014
    0
    That just needs more road!
     
    BoxCarKidd, Aug 30, 2023
    BoxCarKidd, Aug 30, 2023
    #2
    Jordonh Thanks this.
  4. Aug 30, 2023 #3
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

    9,439
    30,850
    Jan 20, 2010
    Hesperia, Ca.
    0
    That’s nothing. What are you using for oil ? I switched oil brand and mine went away on my former 3406 5EK. Switched to Guardol 15-40. Then I found a local oil distributor who carried their own house blend which was even better and exceeded all specs.
     
    Diesel Dave, Aug 30, 2023
    Diesel Dave, Aug 30, 2023
    #3
    Jordonh and Coffey Thank this.
  5. Aug 30, 2023 #4
    Jordonh

    Jordonh Light Load Member

    52
    38
    Jul 1, 2022
    North Carolina
    0
    That's good to know we did a oil change and coolant change recently, currently using Delvac 15W-40 for all of our trucks
     
    Jordonh, Aug 30, 2023
    Jordonh, Aug 30, 2023
    #4
    Diesel Dave and Coffey Thank this.
  7. Sep 4, 2023 #5
    Cdemars316

    Cdemars316 Heavy Load Member

    900
    5,591
    Nov 10, 2018
    0
    Delvac is the oil my mbn drinks like a drunken sailor, I switched up to Lucas synthetic and oil use besides a leak is non existent
     
    Cdemars316, Sep 4, 2023
    Cdemars316, Sep 4, 2023
    #5
    Jordonh Thanks this.
  8. Sep 4, 2023 #6
    wore out

    wore out Numbered Classic

    17,024
    209,232
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    Delvac is allegedly what CAT rebrands for their oil. I know they smell the same after a change. I know right but they do. I used to run Rotella in everything. Several years ago went to Delvac in my CATS, we been pretty happy with it.

    I agree all that engine needs is ran
     
    wore out, Sep 4, 2023
    wore out, Sep 4, 2023
    #6
    wildcoyote, bzinger, Last Call and 1 other person Thank this.
  9. Sep 11, 2023 #7
    Jordonh

    Jordonh Light Load Member

    52
    38
    Jul 1, 2022
    North Carolina
    0
    While I'm at it, does moisture or heat cause the engine to exit small drips of water out the blowby tube. I'm most certainly it's caused by moisture still in the engine... since the guy I brought it from had it sit for a year I've been noticing it today.
     
    Jordonh, Sep 11, 2023
    Jordonh, Sep 11, 2023
    #7
  10. Sep 12, 2023 #8
    wore out

    wore out Numbered Classic

    17,024
    209,232
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    That ain’t moisture…..I can promise you that. My bet is liner o rings are just starting to leak from liner walk or heat. Taste it it will be sweet. Minute amounts of antifreeze manifest as blowby. A bright light shined up tube will confirm color.
     
    wore out, Sep 12, 2023
    wore out, Sep 12, 2023
    #8
    NightWind, bzinger and Jordonh Thank this.
  11. Mar 12, 2024 #9
    Jordonh

    Jordonh Light Load Member

    52
    38
    Jul 1, 2022
    North Carolina
    0
    @wore out Little curious on my blowby now, ever since getting the truck in late September blowby was low now it looks a little more normal then usually then I expected, comes out the oil fill cap only when removed and stops coming from breather tube? Not sure if it’s liner o-rings giving out normal stem smells like oil. It drips a little more than usually.

    https://youtube.com/shorts/tOGqQHnVFws?si=04lCU_elC4QynEMK
     
    Jordonh, Mar 12, 2024
    Jordonh, Mar 12, 2024
    #9
    wildcoyote Thanks this.
  12. Mar 12, 2024 #10
    wore out

    wore out Numbered Classic

    17,024
    209,232
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    Look up the tube with the motor off, or pull a valve cover I’ll bet you find sludge. Either way it’s time to do something about it
     
    wore out, Mar 12, 2024
    wore out, Mar 12, 2024
    #10
    Jordonh Thanks this.
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