Plastic oil pan

Spend the money, you'll never fix it

 

J B Weld....?

 

Bubble gum

 

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.

 

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.

 

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.

 

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.

 

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.

 

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.