⚙️ Keep your Cummins running smooth — don’t let leaks slow your grind!
This MOTOKU front main crankshaft oil seal and wear sleeve combo is a direct OE replacement (part #3802820) designed for Cummins 5.9L engines in Ram 2500, 3500, D250, D350, and W350 trucks from 1989 to 2016. Engineered for durability and precision fit, it ensures reliable sealing and extended engine life.
| Manufacturer | MOTOKU |
| Brand | MOTOKU |
| Item Weight | 5.9 ounces |
| Package Dimensions | 5.83 x 3.54 x 2.76 inches |
| Item model number | 5864280025 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | None3802820 |
S**S
Seals
Part fitment is great it comes with a seal installer which makes installation a breeze! Not had any issues with any leaks and this is much cheaper than a part from Cummins.
P**!
Crankshaft seals
Works like it should.
J**R
Fit perfect
Fit 2018 6.7 Cummins
**N
Direct replacement
Install was straight forward. They seem to be holding up just fine. I haven't had any leaks. I have 40k miles on it and no complaints. I was a bit skeptical when ordering but no worries they are just as good as oem so far. They fit as well as the oem.
G**.
Good insurance against another leak!
I appreciate it when the after-market has a "fix" for a manufacturer screwup. This is one of those products. The seal depth tool that comes with this kit worked great. And the sleeve went on the crankshaft quite nicely using the harmonic dampener as an installation tool for it... no need to purchase that $40-60 installation tool when you already have one using that dampener.The one "Con" I see in this is that there are no "assembly instructions" that come with the kit, for example, which part goes where during the assembly process (there is one seal that is not "intuitive" as to where it goes). An "order of alignment" diagram would be helpful.
B**W
Great for the price
Works and fits like it should, to properly install this you'll need some other tools. I got my wear sleeve tool from thoroughbred diesel and I had the seal pressed in by a local shop that specializes in cummins diesels. You'll want some thread sealer like loctite 545 to go around the seal before pressing it in.Just got the truck back together I'll update if it starts leaking from the new seal.
C**Y
Seal very low quality
The shipment arrived on time. The box was undamaged. I opened the box to see the seal delaminated/came apart. The black part in the picture is supposed to keep oil in the crankcase. If you are replacing a leaky seal, opt for a genuine Cummins. I'm guessing the heat from the delivery truck is what caused the seal to come apart as I have to assume the person. It would be nice if the shipper would refund my purchase and have a pickup scheduled for the defective product.
B**T
Easy DIY
Shop wanted $500 to replace this. YouTube videos and a weekend.
Trustpilot
5 days ago
2 weeks ago
