Plastic oil pan

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by GAShog19, May 19, 2025.

  1. GAShog19

    GAShog19 Bobtail Member

    40
    13
    Dec 28, 2022
    Englewood, Oh
    0
    I have a 2019 Kenworth t680 with a Paccar mx13 ... It has the plastic oil pan on it and it seems to have a small hairline crack that I have been trying to seal ... Anyone have a product they have tried to seal it ... I've tried a couple products but so far no luck ... Trying to not spend a thousand (if I don't it) or three thousand (if a shop does it) on a pan replacement
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Big Road Skateboard

    Big Road Skateboard Road Train Member

    5,865
    31,194
    May 2, 2021
    0
    Spend the money, you'll never fix it
     
  4. lual

    lual Road Train Member

    4,488
    8,090
    Oct 22, 2020
    SW Georgia
    0
    J B Weld....?
     
    Rideandrepair and Concorde Thank this.
  5. Concorde

    Concorde Road Train Member

    4,392
    15,690
    Jun 29, 2016
    West Melbourne Florida
    0
  6. JB7

    JB7 Medium Load Member

    689
    1,029
    Dec 13, 2022
    Laurel, MD
    0
    Reading reviews on sealers you will find that most say it is only a temporary fix. Where is the crack located? Of course you would need to attempt the repair with the oil drained but almost all oil pans, car or truck, still hold a small amount of oil preventing the crack from being clean. So it would be best to remove the pan. A crack is a stress point and using sealer over the top the crack is likely to spread. In aircraft they use 'stop drilling' which is drilling a hole at each end of the crack to relieve the stress, but not always 100% effective. Ideally the crack should be v'ed out and then filled. Plastic welders are sold and not crazy expensive. I would try a radiator shop and see what they say as many/most newer radiators have plastic tanks that can be repaired. And they are under pressure unlike an oil pan.
     
  7. Ridgeline

    Ridgeline Road Train Member

    22,235
    114,406
    Dec 18, 2011
    Michigan
    0
    JB Weld Tank weld or plastic weld, clean the crack up really well, you don't need a lot and let it set for at least 24 hours, if not 48.
     
    ducnut and Rideandrepair Thank this.
  8. Rideandrepair

    Rideandrepair Road Train Member

    17,257
    56,005
    Aug 8, 2015
    0
    A8C87233-03B4-46BF-A4FE-A231A99AB5FF.png I’ve used this twice on automobile gasoline tanks. Dime sized rusty hole. Gooped it on, covered with a small metal patch, gooped some more over that. Sold the car today. Still not leaking after 20 years.
     
    Last edited: May 19, 2025
  9. AModelCat

    AModelCat Road Train Member

    28,980
    156,091
    Jul 7, 2015
    Canuckistan
    0
    Better budget for a new oil pan. Anything you put on there is nothing more than a patch to make it last long enough to replace it when it's convenient IMO.
     
  10. rollin coal

    rollin coal Road Train Member

    13,159
    26,266
    Mar 29, 2008
    TN
    0
    Plastic oil pans what a great idea... think of all the fuel saved from reduced weight... I was in a 2019 Cascadia that had one the dealer cracked it when servicing the truck. They're not built to last and not cheap either. I suppose plastic oil pans are on everything now.
     
    Rideandrepair Thanks this.
  11. OlegMel

    OlegMel Medium Load Member

    373
    654
    Apr 8, 2023
    0
    Make sure to sand the area around the crack with sandpaper . Also use break clean to degrease it really well. I’d use jb weld made for plastic and let it cure.
     
    Rideandrepair Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.